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United States Department of Agriculture

Agricultural Research Service

Related Topics

Richard K Gast
Egg Safety & Quality Research
Microbiology

Phone: (706) 546-3445
Fax: (706) 546-3035

USDA, ARS, SAA
950 COLLEGE STATION ROAD
RBRRC
ATHENS , GA 30605

Projects
Evaluation of Management of Laying Hens and Housing Systems to Control Salmonella and Other Pathogenic Infections, Egg Contamination, and Product Quality
Appropriated (D)
  Accession Number: 430344
Laying Hen Performance, Food Safety, and Well-being in Cage-free Housing as Impacted by an Early Molt
Specific Cooperative Agreement (S)
  Accession Number: 431579
Delayed Movement of Pullets to the Hen Facility During a Disease Outbreak
Specific Cooperative Agreement (S)
  Accession Number: 428099

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Colonization of internal organs by Salmonella serovars Heidelberg and Typhimurium in experimentally infected laying hens housed in enriched colony cages at different stocking densities -
Metabolic parameters linked by Phenotype MicroArray to acid resistance profiles of poultry-associated Salmonella enterica -
Guard, J.Y., Rothrock Jr, M.J., Shah, D., Jones, D.R., Gast, R.K., Sanchez-Ingunza, R., Madsen, M., El-Attrache, J., Lungu, B. 2016. Metabolic parameters linked by Phenotype MicroArray to acid resistance profiles of poultry-associated Salmonella enterica. Research in Microbiology. 1-12. Available:http//www.elsevier.com/locate/remisc.
Colonization of internal organs by Salmonella serovars Heidelberg and Typhimurium in experimentally infected laying hens housed in enriched colony cages at different stocking densities -
Gast, R.K., Guraya, R., Jones, D.R., Guard, J.Y., Anderson, K.E., Karcher, D. 2016. Colonization of internal organs by Salmonella serovars Heidelberg and Typhimurium in experimentally infected laying hens housed in enriched colony cages at different stocking densities. Poultry Science Association Meeting Abstract. Paper No. 72.
Salmonella enterica. -
Waltman, W. Douglas and Richard K. Gast, 2016. Salmonella enterica. In Isolation and Identification of Avian Pathogens, 6th edition, S. M. Williams, L. Dufour-Zavala, M. W. Jackwood, M. D. Lee, B. Lupiani, W. M. Reed, E. Spackman, and P. R. Woolcock, eds., pp. 103-112. American Association of Avian Pathologists, Athens, GA
Microbiology of Shell Egg Production in the United States -
Gast, R.K. 2016. Microbiology of Shell Egg Production in the United States. In Producing Safe Eggs, Steven C. Ricke and Richard K. Gast, eds. Academic Press, London, UK. p. 25-44.
Colonization of internal organs by Salmonella Enteritidis in experimentally infected laying hens housed in enriched colony cages at different stocking densities Reprint Icon -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K., Karcher, D.M. 2016. Colonization of internal organs by Salmonella Enteritidis in experimentally infected laying hens housed in enriched colony cages at different stocking densities. Poultry Science. 95:1363-1369.
Colonization of internal organs by Salmonella Enteritidis in experimentally infected laying hens housed in enriched colony cages at different stocking densities -
Influence of commercial laying hen housing systems on the incidence and identification of Salmonella and Campylobacter -
Jones, D.R., Guard, J.Y., Gast, R.K., Buhr, R.J., Fedorka-Cray, P.J., Abdo, Z., Plumblee, J., Bourassa, D.V., Cox Jr, N.A., Rigsby, L.L., Robinson, C.I., Regmi, P., Karcher, D.M. 2016. Influence of commercial laying hen housing systems on the incidence and identification of Salmonella and Campylobacter. Poultry Science. 95(5):1116-1124.
Microbiological Consequences of Different Housing Systems for Laying Hens: Field and Experimental Infection Studies -
Gast, R.K., Jones, D.R., Guraya, R., Anderson, K., Karcher, D.M. 2015. Microbiological Consequences of Different Housing Systems for Laying Hens: Field and Experimental Infection Studies. Proceedings of Northeast Conference on Avian Diseases. p. 10.
Salmonella and Impact on Egg Production -
Persistence of fecal shedding of Salmonella Enteritidis by experimentally infected laying hens housed in conventional or enriched cages. -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2015. Persistence of fecal shedding of Salmonella Enteritidis by experimentally infected laying hens housed in conventional or enriched cages. Poultry Science Association Meeting Abstract. 94 (E-Suppl.1):60.
Persistence of fecal shedding of Salmonella Enteritidis by experimentally infected laying hens housed in conventional or enriched cages -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2015. Persistence of fecal shedding of Salmonella Enteritidis by experimentally infected laying hens housed in conventional or enriched cages. Poultry Science. 94:1650-1656.
Recovery of Salmonella enterica serovar Enteritidis from hens initially infected with serovar Kentucky -
Guard, J.Y., Sanchez-Ingunza, R., Shah, D.H., Rothrock Jr, M.J., Gast, R.K., Jones, D.R. 2015. Recovery of Salmonella enterica serovar Enteritidis from hens initially infected with serovar Kentucky. Journal of Food Chemistry, 189:86-92. 2015.
Horizontal transmission of Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2014. Horizontal transmission of Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages. Poultry Science. 93:3145-3151.
Microbiological impact of three commercial laying hen housing systems -
Jones, D.R., Cox Jr, N.A., Guard, J.Y., Cray, P.J., Buhr, R.J., Gast, R.K., Abdo, Z., Rigsby, L.L., Plumblee, J., Karcher, D.M., Robinson, C.I., Blatchford, R.A., Makagon, M.M. 2015. Microbiological impact of three commercial laying hen housing systems. Poultry Science. 94(3):544-551.
Development and application of novel SNP-based serotyping assays in targeting Salmonella enterica within the poultry production and processing continuum. -
Horizontal transmission of Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2014. Horizontal transmission of Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages. Poultry Science Association Meeting Abstract. 93(1):263.
Integrated farm management to prevent Salmonella Enteritidis contamination of eggs -
Trampel, D.W., Holder, T.G., Gast, R.K. 2014. Integrated farm management to prevent Salmonella Enteritidis contamination of eggs. Journal of Applied Poultry Research. 23(2):353-365.
Continuing multiplication of Salmonella Enteritidis strains in egg yolk during refrigeration at 7.2° C -
Gast, R.K., Guraya, R. 2014. Continuing multiplication of Salmonella Enteritidis strains in egg yolk during refrigeration at 7.2° C. International Journal of Poultry Science. 12(11):622-627.
Salmonella Enteritidis organ invasion and egg contamination in experimentally infected laying hens housed in conventional or enriched cages. -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2014. Salmonella Enteritidis organ invasion and egg contamination in experimentally infected laying hens housed in conventional or enriched cages. American Association of Avian Pathologist. p.20.
Contamination of eggs by Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K. 2014. Contamination of eggs by Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages. Poultry Science. 93:728-733.
Colonization of internal organs by Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages. -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2013. Colonization of internal organs by Salmonella Enteritidis in experimentally infected laying hens housed in conventional or enriched cages. Poultry Science. 92:468-473.
Assessing the Significance of Salmonella Heidelberg Infections in Egg-Laying Flocks -
Gast, R.K. 2012. Assessing the Significance of Salmonella Heidelberg Infections in Egg-Laying Flocks. Trade Journal Publication. http://egg-cite.com/presentations/gast/slideshow.aspx.
Salmonella Enteritidis deposition in eggs after experimental infection of laying hens with different oral doses -
Gast, R.K., Guraya, R., Guard, J.Y. 2013. Salmonella Enteritidis deposition in eggs after experimental infection of laying hens with different oral doses. Journal of Food Protection. 76:108-113.
Comparison of dkgB-linked Intergenic Sequence Ribotyping to DNA Microarray Hydridization for Assigning Serotype to Salmonella Enterica. -
Guard, J.Y., Sanchez-Ingunza, R., Morales, C., Stewart, T.E., Liljebjelke, K., Van Kessel, J.S., Ingram, K.D., Jones, D.R., Jackson, C.R., Cray, P.J., Frye, J.G., Gast, R.K., Hinton Jr, A. 2012. Comparison of dkgB-linked Intergenic Sequence Ribotyping to DNA Microarray Hydridization for Assigning Sterotype to Salmonella enterica. FEMS Microbiology Letters. 337(1):61-72.
Microbiological differences between laying hen strains housed in various production systems. -
Jones, D.R., Anderson, K., Guard, J.Y., Gast, R.K. 2012. Microbiological differences between laying hen strains housed in various production systems. Poultry Science. 91(supp):27.
Salmonella Enteritidis Deposition inside Eggs after Experimental Infection of Laying Hens with Different Oral Doses -
Gast, R.K., Guraya, R., Guard, J.Y. 2012. Salmonella Enteritidis Deposition inside Eggs after Experimental Infection of Laying Hens with Different Oral Doses. Poultry Science Association. 91(Supplement 1):28.
Detecting Salmonella Enteritidis in Laying Hens and Eggs after Experimental Infection at Different Oral Dose Levels -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2012. Detecting Salmonella Enteritidis in Laying Hens and Eggs after Experimental Infection at Different Oral Dose Levels. International Association for Food Protection. 74(SupplementA):52.
Controlling Egg Contamination by Understanding Salmonella Enteritidis Infections in Laying Hens -
Gast, R.K., Guard, J.Y. 2012. Controlling Egg Contamination by Understanding Salmonella Enteritidis Infections in Laying Hens. World Wide Web. http://egg-cite.com/presentations/NCADC/Slideshow.aspx.
Isolation of Salmonella Enteritidis from Internal Organs of Experimentally Infected Laying Hens Housed in Conventional or Enriched Cages -
Gast, R.K., Guraya, R., Jones, D.R., Anderson, K.E. 2013. Isolation of Salmonella Enteritidis from Internal Organs of Experimentally Infected Laying Hens Housed in Conventional or Enriched Cages. Poultry Science Association Meeting Abstract. 92(1):26.
Salmonella Enteritidis -
Ricke, S.C., Gast, R.K. 2014. Salmonella Enteritidis. In: Encyclopedia of Food Microbiology. Vol 3, Elsevier Ltd, Academic Press. p 343-348.
CONTROLLING EGG CONTAMINATION BY UNDERSTANDING SALMONELLA ENTERITIDIS INFECTIONS IN LAYING HENS -
Gast, R.K., Guard, J.Y. 2012. Controlling Egg Contamination By Understanding Salmonella Enteritidis Infections In Laying Hens. Proceedings of North Central Avian Disease Conference. p. 49.
Thermal inactivation of avian viral and bacterial pathogens in an effluent treatment system within a biosafety level 2 and 3 enhanced facility Reprint Icon -
Chmielewski, R.A., Day, J.M., Spatz, S.J., Yu, Q., Gast, R.K., Zsak, L., Swayne, D.E. 2011. Thermal inactivation of avian viral and bacterial pathogens in an effluent treatment system within a biosafety level 2 and 3 enhanced facility. Applied Biosafety. 16(4):206-217.
Salmonella Infections -
Gast, R.K. 2013. Salmonella Infections. In Diseases of Poultry. 13th edition. D.E. Swayne, ed. Wiley-Blackwell Publishing, Ames, Iowa. p. 677.
Paratyphoid Infections -
Gast, R.K. 2013. Paratyphoid Infections. In Diseases of Poultry, 13th edition. D.E.Swayne, ed. Wiley-Blackwell Publishing, Ames, Iowa. p 693-713,718-733.
Frequency and persistence of fecal shedding following exposure of laying hens to different oral doses of Salmonella enteritidi -
Gast, R.K., Guraya, R., Holt, P.S. 2011. Frequency and persistence of fecal shedding following exposure of laying hens to different oral doses of Salmonella enteritidi. International Journal of Poultry Science. 10:750-756.
Controlling Egg Contamination with Salmonella Enteritidis by Understanding its Pathobiology -
Gast, R.K., Guard, J.Y. 2011. Controlling Egg Contamination with Salmonella Enteritidis by Understanding its Pathobiology. PoultryMed. Available:http://www.poultrymed.com/Poultry/Templates/ShowPage.asp?.
Single Nucleotide Polymorphisms that Differentiate Two Subpopulations of Salmonella Enteritidis Within Phage Type -
Guard, J.Y., Morales, C., Cray, P.J., Gast, R. K. 2011. Single nucleotide polymorphisms that differentiate two subpopulations of salmonella enteritidis within phage type. BMC Research Notes. 4:369
Controlling Egg Contamination with Salmonella Enteritidis by Understanding its Pathobiology -
Gast, R.K., Guard, J.Y. 2011. Controlling Egg Contamination with Salmonella Enteritidis by Understanding its Pathobiology. In: Proceedings of the 22nd Latin American Poultry Congress, 2011. CDROM
Eggs and Egg Products -
Ricke, S., Jones, D.R., Gast, R.K. 2015. Eggs and Egg Products. In Compendium of Methods for the Microbiological Examination of Foods, 5th edition, Y. Salfinger and M.L. Tortorello, eds., pp. 633-643. American Public Health Association, Washington, DC.
A Role for Vaccination to Control Salmonella in Poultry Flocks -
Gast, R.K. 2011. A Role for Vaccination to Control Salmonella in Poultry Flocks. Electronic Publication. http://www.poultrymed.com/Poultry/Templates/showpage.asp?DBID=1&LNGID=1&TMID=111&FID=352&PID=12487.
Frequency and magnitude of internal organ colonization following exposure of laying hens to different oral doses of Salmonella Enteritidis -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2011. Frequency and magnitude of internal organ colonization following exposure of laying hens to different oral doses of Salmonella Enteritidis. International Journal of Poultry Science. 10:325-331.
Fecal shedding and internal organ colonization following exposure of laying hens to different oral doses of Salmonella Enteritidis -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2011. Fecal shedding and internal organ colonization following exposure of laying hens to different oral doses of Salmonella Enteritidis. Poultry Science Symposium Proceedings. Poultry Science. (E supplement 1):2.
Changes in Peyer’s Patch and Cecal Tonsil B Lymphocytes in Laying Hens Following Challenge with Salmonella enterica serovar Enteritidis -
Holt, P.S., Vaughn, L., Gast, R.K. 2011. Changes in Peyer’s Patch and Cecal Tonsil B Lymphocytes in Laying Hens Following Challenge with Salmonella enterica serovar Enteritidis. International Journal of Poultry Science. 10: 231-237.
A Role for Vaccination to Control Salmonella in Poultry Flocks -
Gast, R.K. 2011. A Role for Vaccination to Control Salmonella in Poultry Flocks. American College of Poultry Veterinarians. Vol 1:54-59.
The relationship between the numbers of Salmonella Enteritidis, Salmonella Heidelberg, or Salmonella Hadar colonizing reproductive tissues of experimentally infected laying hens and deposition inside eggs -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2011. The relationship between the numbers of Salmonella Enteritidis, Salmonella Heidelberg, or Salmonella Hadar colonizing reproductive tissues of experimentally infected laying hens and deposition inside eggs. Avian Diseases. 55:243-247.
Strategies for Controlling Salmonella Enteritidis in Poultry Flocks: Translating Research into Action -
Gast, R.K. 2011. Strategies for Controlling Salmonella Enteritidis in Poultry Flocks: Translating Research into Action. Meeting Proceedings. Available:http://www.bccdc.ca/NR/rdonlyres/174B83CO-E172-4663-AE01-B836436B40D7/0/Gast.pdf..
The Impact of Different Housing Systems on Egg Safety and Quality -
Holt, P.S., Davies, R.H., Dewulf, J., Gast, R.K., Huwe, J.K., Jones, D.R., Waltman, D., Willian, K.R. 2010. The Impact of Different Housing Systems on Egg Safety and Quality. Proceedings of Iowa Egg Symposium. Proceedings of the Iowa Egg Industry Symposium, November 10, 2010, Iowa State University, Ames, IA..
Salmonella Growth and Deposition Inside Eggs: Implications for Refrigeration as a Control Strategy -
Gast, R.K. 2010. Salmonella Growth and Deposition Inside Eggs: Implications for Refrigeration as a Control Strategy. Georgia Poultry Conference Proceedings. Available: http://www.poultry.uga.edu/gaconference10.htm..
Salmonella enterica serovar Enteridis (SE) infection in 5 commercial white egg and 3 commercial brown egg strains of laying hens: comparison of SE colonization with immune responsiveness -
Holt, P.S., Vaughn, L.E., Gast, R.K., Anderson, K.E. 2010. Salmonella enterica serovar Enteridis (SE) infection in 5 commercial white egg and 3 commercial brown egg strains of laying hens: comparison of SE colonization with immune responsiveness. Avian Immunology Research Group Abstract. p. 37.
In Vitro Penetration of Salmonella Enteritidis through Yolk Membranes of Eggs from Six Genetically Distinct Commercial Lines of Laying Hens. -
Gast, R.K., Jones, D.R., Anderson, K.E., Guraya, R., Guard, J.Y., Holt, P.S. 2010. In Vitro Penetration of Salmonella Enteritidis through Yolk Membranes of Eggs from Six Genetically Distinct Commercial Lines of Laying Hens. Poultry Science: 89:1732-1736.
Pre-Harvest Measures to Control Salmonella in Layers -
Gast, R.K. 2011. Pre-Harvest Measures to Control Salmonella in Layers. Improving Egg and Egg Product Safety and Quality. Cambridge, UK: Flip Van Immerseel, Yves Nys, and Maureen Bain, eds. Woodhead Publishing. (2):120-145.
The Impact of Different Housing Systems on Egg Safety and Quality -
Holt, P.S., Davies, R.H., Dewulf, J., Gast, R.K., Huwe, J.K., Jones, D.R., Waltman, D., Willian, K.R. 2010. The Impact of Different Housing Systems on Egg Safety and Quality. Poultry Science. 90:251-262.
Multiplication of Salmonella Enteritidis in egg yolks after inoculation outside, on, and inside vitelline membranes and storage at different temperatures -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2010. Multiplication of Salmonella Enteritidis in egg yolks after inoculation outside, on, and inside vitelline membranes and storage at different temperatures. Journal of Food Protection. 73:1902-1906.
The Impact of Different Housing Systems on Egg Safety and Quality -
Holt, P.S., Gast, R.K., Jones, D.R. 2010. The Impact of Different Housing Systems on Egg Safety and Quality. Meeting Abstract. Poultry Science. 89:831.
Multiplication of Salmonella Enteritidis in egg yolks after inoculation outside, on, and inside vitelline membranes and storage at different temperatures -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2010. Multiplication of Salmonella Enteritidis in egg yolks after inoculation outside, on, and inside vitelline membranes and storage at different temperatures. Poultry Science Association Meeting Abstract. (89): p. 856.
The Relationship between the Numbers of Salmonella Enteritidis, S. Heidelberg, or S. Hadar Colonizing Reproductive Tissues of Experimentally Infected Laying Hens and Deposition inside Eggs -
Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2010. The Relationship between the Numbers of Salmonella Enteritidis, S. Heidelberg, or S. Hadar Colonizing Reproductive Tissues of Experimentally Infected Laying Hens and Deposition inside Eggs. American Association of Avian Pathologists. Paper No. 9203.
Selection and Characterization of Cellulose Deficient Derivatives of Shiga Toxin Producing Escherichia coli -
Yoo, B., Stewart, T.E., Guard, J.Y., Musgrove, M.T., Gast, R.K., Chen, J. 2010. Selection and Characterization of Cellulose Deficient Mutants of Shiga Toxin Producing Escherichia coli. 2010. Applied and Environmental Microbiology. 73:1038-1046.
Preharvest control of Salmonella -
Gast, R.K. 2010. Preharvest Control of Salmonella. WATT Poultry USA. p. 16-20.
Salmonella Control in Laying Flocks: The Scientific Background -
Gast, R.K. 2009. Salmonella Control in Laying Flocks: The Scientific Background. Proceedings of Iowa Egg Symposium: pp.1-7, 2009.
Comparing in vitro lymphocyte reactivity to Salmonella enterica serovar Enteridis (SE) antigens 5 commercial white egg and 3 commercial brown egg strains of laying hens following SE infection. -
Holt, P.S., Vaughn, L.E., Gast, R.K., Anderson, K.E. 2010. Comparing in vitro lymphocyte reactivity to Salmonella enterica serovar Enteridis (SE) antigens 5 commercial white egg and 3 commercial brown egg strains of laying hens following SE infection. Western Poultry Disease Conference. p. 107.
Flow Cytometric Characterization of Peyer’s Patch and Cecal Tonsil T Lymphocytes in Laying Hens Following Challenge with Salmonella enterica serovar Enteritidis -
Holt, P.S., Vaughn, L.E., Gast, R.K. 2010. Flow Cytometric Characterization of Peyer’s Patch and Cecal Tonsil T Lymphocytes in Laying Hens Following Challenge with Salmonella enterica serovar Enteritidis. Veterinary Immunology and Immunopathology. 133:276-281.
The Scientific Background for Salmonella Control in Laying Flocks -
Gast, R.K. 2009. The Scientific Background for Salmonella Control in Laying Flocks. Georgia Poultry Conference Proceedings.
Colonization of avian reproductive tract tissues by variant subpopulations of Salmonella Enteritidis -
Guard, J.Y., Gast, R.K., Guraya, R. 2010. Colonization of avian reproductive tract tissues by variant subpopulations of Salmonella Enteritidis. Avian Diseases. 54:857-861.
Strategies for Pre-Harvest Control of Food-borne Salmonella in Poultry -
Gast, R.K. 2009. Strategies for Pre-Harvest Control of Food-borne Salmonella in Poultry. American Association of Avian Pathologists.
Penetration of Salmonella enteritidis through the yolk membrane in eggs from six genetically distinct commercial lines of laying hens. -
Gast, R.K., Jones, D.R., Anderson, K.E., Guraya, R., Bouldin, J.G., Holt, P.S. 2009. Penetration of Salmonella enteritidis through the yolk membrane in eggs from six genetically distinct commercial lines of laying hens. Poultry Science Association Meeting Abstract.
Effect of prior passage through laying hens on invasion of reproductive organs by Salmonella Enteritidis -
Gast, R.K., Bouldin, J.G., Guraya, R., Holt, P.S. 2009. Effect of prior passage through laying hens on invasion of reproductive organs by Salmonella Enteritidis. International Journal of Poultry Science. (8):116-121.
Serologic Testing for Salmonella Infections in Poultry Flocks: Limitations and Opportunities -
Gast, R.K. 2009. Serologic Testing for Salmonella Infections in Poultry Flocks: Limitations and Opportunities. American College of Poultry Veterinarians. pp.168-174.
Detection of Salmonella enterica serovar Enteritidis (SE) Antibodies in Serum Using A Polystyrene Bead/SE Flagella Agglutination Assay -
Use of carboxyfluorescein diacetate succinimidyl ester (CFSE) dye and fluorescent imaging as an in situ method to visualize lymphoid tissues in egg-layer chickens challenged with Salmonella enterica serovar Enteritidis (SE) -
Mechanisms of egg contamination by Salmonella Enteritidis -
Gantois, I., Ducatelle, R., Pasmans, F., Haesebrouck, F., Gast, R.K., Humphrey, T., Van Immerseel, F. 2009. Mechanisms of egg contamination by Salmonella Enteritidis. FEMS Microbiology Letters. (33):718-738.
Evolutionary trends of Salmonella Enteritidis linked to subpopulation biology and virulence attributes -
Guard, J.Y., Morales, C., Gast, R.K. 2008. Evolutionary trends of Salmonella Enteritidis linked to subpopulation biology and virulence attributes. United States Animal Health Association Proceedings. 480.
CELLULAR ASSESSMENT OF CROP LYMPHOID TISSUE FROM SPECIFIC-PATHOGEN-FREE WHITE LEGHORN CHICKENS AFTER SALMONELLA ENTERITIDIS CHALLENGE -
Vaughn, L.E., Holt, P.S., Gast, R.K. 2008. Cellular assessment of crop lymphoid tissue from specific-pathogen-free white leghorn chickens after salmonella enteritidis challenge. Avian Disease. 52:657-664.
In vitro multiplication of Salmonella Enteritidis on the egg yolk membrane and penetration to the yolk contents -
Gast, R.K., Guraya, R., Bouldin, J.G., Holt, P.S. 2008. Multiplication of Salmonella Enteritidis on the yolk membrane and penetration to the yolk contents at 30 c in an in vitro egg contamination model. Journal of Food Protection. 71:1905-1909.
Effect of passage through laying hens on organ invasiveness and phenotypic heterogeneity of Salmonella enteritidis -
Gast, R.K., Bouldin, J.G., Guraya, R., Holt, P.S. 2008. Effect of passage through laying hens on organ invasiveness and phenotypic heterogeneity of Salmonella enteritidis. Poultry Science. 87(1):54.
Multiplication of Salmonella Enteritidis on Egg Yolk Membranes and Penetration into Yolk Contents -
Gast, R.K., Guraya, R., Bouldin, J.G., Holt, P.S. 2008. Multiplication of Salmonella Enteritidis on egg yolk membranes and penetration into yolk contents. International Association for Food Protection Proceedings, p.35.
Location of Salmonella enterica serovar Enteritidis on House Flies (Musca domestica) Obtained from Rooms Containing S. Enteritidis-challenged Hens -
Holt, P.S., Geden, C.J., Vaughn, L.E., Gast, R.K. 2008. Location of Salmonella enterica serovar Enteritidis on House Flies (Musca domestica) Obtained from Rooms Containing S. Enteritidis-challenged Hens. American Society for Microbiology.
Crop Immune Response Post-Salmonella Enteritidis Challenge in Eight Commercial Egg-Layer Strains and Specific Pathogen Free White Leghorn Chickens -
Vaughn, L.E., Holt, P.S., Moore, R.W., Gast, R.K., Anderson, K.E. 2008. Crop Immune Response Post-Salmonella Enteritidis Challenge in Eight Commercial Egg-Layer Strains and Specific Pathogen Free White Leghorn Chickens. Avian Disease. 52:79-87.
Salmonella Infections -
Gast, R.K. 2008. Salmonella Infections: Diseases of Poultry, 12th edition. Blackwell Publishing, Ames, Iowa, pp.619.
Paratyphoid Infections -
Gast, R.K. 2008. Paratyphoid Infections. Diseases of Poultry, 12 edition. Blackwell Publishing, Ames, iowa, pp.636-655.
Detection of Salmonella enterica subpopulations by phenotype microarray antibiotic resistance patterns -
Bouldin, J.G., Morales, C., Frye, J.G., Gast, R.K., Musgrove, M.T. 2007. Detection of Salmonella enterica subpopulations by phenotype microarray antibiotic resistance patterns. Applied and Environmental Microbiology. 73(23):7753-7756.
Serotype-specific and serotype-independent strategies for pre-harvest control of foodborne Salmonella in poultry. -
Gast, R.K. 2007. Serotype-specific and serotype-independent strategies for pre-harvest control of foodborne Salmonella in poultry. Avian Diseases. 51:817-828.
Isolation of Salmonella enterica serovar Enteritidis from House Flies (Musca domestica) Found in Rooms Containing Salmonella serovar Enteritidis-challenged hens. -
Holt, P.S., Geden, C.J., Moore, R.W., Gast, R.K. 2007. Isolation of Salmonella enterica serovar Enteritidis from House Flies (Musca domestica) Found in Rooms Containing S. Enteritidis-challenged Hens. Applied and Environmental Microbiology.73:6030-6035.
Novel staining procedure to visualize the chicken Peyer’s patch in situ for expanded immunological research of this tissue in poultry -
Holt, P.S., Vaughn, L.E., Moore, R.W., Gast, R.K., Kaiser, P. 2007. Novel staining procedure to visualize the chicken Peyer’s patch in situ for expanded immunological research of this tissue in poultry. Meeting Abstract.
In Vitro Penetration of Egg Yolks by Salmonella Enteritidis and Salmonella Heidelberg Strains During 36-hour Ambient Temperature Storage -
Gast, R.K., Guraya, R., Bouldin, J.G., Holt, P.S. 2007. In Vitro Penetration of Egg Yolks by Salmonella Enteritidis and Salmonella Heidelberg Strains During 36-hour Ambient Temperature Storage. Poultry Science.86(7):1431-1435
Crop Isolated Lymphoid Follicles and Ileal Peyer’s patches in Egg-Layer Hens Challenged with Salmonella enterica Enteritidis -
Holt, P.S., Vaughn, L., Moore, R.W., Gast, R.K. 2007. Crop Isolated Lymphoid Follicles and Ileal Peyer’s patches in Egg-Layer Hens Challenged with Salmonella enterica Enteritidis. American Association of Avian Pathologists.
Penetration of Salmonella enteritidis and S. heidelberg strains into egg yolks during 36 hour ambient temperature storage -
Gast, R.K., Guraya, R., Bouldin, J.G., Holt, P.S. 2007. Penetration of Salmonella enteritidis and S. heidelberg strains into egg yolks during 36 hour ambient temperature storage. International Association for Food Protection, p 99.
PATHOTYPING OF SALMONELLA ENTERICA BY ANALYSIS OF SNPS IN CYAA AND FLANKING 23S RIBOSOMAL SEQUENCES -
Bouldin, J.G., Musgrove, M.T., Humphrey, T.J., Cates, C.W., Gast, R.K., Morales, C. 2007. Pathotyping of salmonella enterica by analysis of snps in cyaa and flanking 23s ribosomal sequences. Environmental Microbiology.9(4):1047-1059.
ARS Egg Safety and Quality Research Unit -
Gast, R.K. 2006. ARS Egg Safety and Quality Research Unit: Organization and Activities. United States Animal Health Association Committee on Salmonella Proceedings, p 22.
COLONIZATION OF SPECIFIC REGIONS OF THE REPRODUCTIVE TRACT AND DEPOSITION AT DIFFERENT LOCATIONS INSIDE EGGS LAID BY HENS INFECTED WITH SALMONELLA ENTERITIDIS OR SALMONELLA HEIDELBERG -
Gast, R.K., Guraya, R., Bouldin, J.G., Holt, P.S., Moore, R.W. 2007.Colonization of specific regions of the reproductive tract and deposition at different locations inside eggs laid by hens infected with salmonella enteritidis or salmonella heidelberg. Avian Diseases.51(1):40-44.
J. Linkage of avian and reproductive tract tropism with sequence divergence adjacent to the 5S ribosomal subunit rrfH of Salmonella enterica. -
Morales, C., Gast, R.K., Bouldin, J.G. 2006. J. Linkage of avian and reproductive tract tropism with sequence divergence adjacent to the 5s ribosomal subunit rrfh of salmonella enterica.Federation of European Microbiological Societies Microbiology Letters.264(1):48-58.
USE OF NOVEL STAINING PROCEDURE TO VISUALIZE AND ISOLATE CHICKEN PEYER’S PATCHES FOR INTESTINAL IMMUNE RESPONSE STUDIES AGAINST SALMONELLA INFECTION -
Holt, P.S., Vaughn, L.E., Moore, R.W., Gast, R.K., Kaiser, P. 2006. Use of novel staining procedure to visualize and isolate chicken peyer’s patches for intestinal immune response studies against salmonella infection. 9th Avian Immunology Group Meeting.p. 57
COMPARISONS OF S ENTERICA SEROVAR ENTERITIDIS LEVELS IN CROPS OF FED OR FASTED INFECTED HENS -
Holt, P.S., Vaughn, L.E., Moore, R.W., Gast, R.K. 2006. Comparisons of s enterica serovar enteritidis levels in crops of fed or fasted infected hens. Avian Diseases.50(3):425-429.
COLONIZATION OF RERPODUCTIVE TRACT AND DEPOSITION INSIDE EGGS LAID BY HENS INFECTED WITH SALMONELLA ENTERITIDIS OR S. HEIDELBERG -
Gast, R.K., Guraya, R., Bouldin, J.G., Holt, P.S., Moore, R.W. 2006. Colonization of rerpoductive tract and deposition inside eggs laid by hens infected with salmonella enteritidis or s. heidelberg (abstract). Poultry Science Association Meeting. 85:(1):134
COMPARISON OF S. ENTERICA SEROVAR ENTERITIDIS LEVELS IN CROPS OF FED OR FASTED INFECTED HENS -
Holt, P.S., Vaughn, L.E., Moore, R.W., Gast, R.K. 2007. Comparison of s. enterica serovar enteritidis levels in crops of fed or fasted infected hens. Avian Diseases: 50:425-429
A NEW CRACK AT EGG SAFETY: FROM THE HEN HOUSE TO YOUR HOUSE -
Musgrove, M.T., Curtis, P., Ramirez, G., Latimer, H., Thesmar, H., Jones, D.R., Gast, R.K. 2006. A new crack at egg safety: from the hen house to your house (abstract).International Association for Food Protection Annual Meeting. p.67.
EFFECT OF EGG REFRIGERATION ON IN VITRO PENETRATION OF SALMONELLA ENTERITIDIS THROUGH THE EGG YOLK MEMBRANE -
Gast, R.K., Holt, P.S., Guraya, R. 2006. Effect of egg refrigeration on in vitro penetration of salmonella enteritidis through the egg yolk membrane. Journal of Food Protection. 69:1426-1429
ENHANCED GROSS VISUALIZATION OF CHICKEN PEYER’S PATCH: NOVEL STAINING TECHNIQUE APPLIED TO FRESH TISSUE SPECIMENS -
Vaughn, L.E., Holt, P.S., Moore, R.W., Gast, R.K. 2006. Enhanced gross visualization of chicken peyer’s patch: Novel staining technique applied to fresh tissue specimens. Avaian Diseases. (50):298-302
SALMONELLOSIS -
Waltman, W.D., Gast, R.K., Mallinson, E.T. 2008. Salmonellosis. Isolation and Identification of Avian Pathogens, 5th edition. American Association of Avian Pathologists, Jacksonville, FL, pp.3-9.
HIGH EFFICIENCY ELECTROSTATIC SAMPLER FOR BIOAEROSOLS -
Mitchell, B.W., Gast, R.K. 2005. High efficiency electrostatic sampler for bioaerosols. ARS Food Safety and Inspection Service Research Workshop.
DEVELOPMENT OF A LAVAGE PROCEDURE TO COLLECT LUNG SECRETIONS FROM CHICKENS FOR EVALUATING RESPIRATORY HUMORAL IMMUNITY TO SALMONELLA ENTERITIDIS -
Holt, P.S., Stone, H.D., Moore, R.W., Gast, R.K. 2005. Development of a lavage procedure to collect lung secretions from chickens for evaluating respiratory humoral immunity to salmonella enteritidis. Avian Pathology. 34:396-398. 2005.
DEVELOPMENT OF LYMPHOID TISSUES IN THE CROPS OF HENS INFECTED WITH SALMONELLA ENTERICA SUBSPECIES ENTERICA SEROVAR ENTERITIDIS -
Holt, P.S., Vaughn, L.E., Moore, R.W., Gast, R.K. 2005. Development of lymphoid tissues in the crops of hens infected with salmonella enterica subspecies enterica serovar enteritidis. International Immunology Congress.
THE RELATIONSHIP BETWEEN THE DURATION OF FECAL SHEDDING AND THE PRODUCTION OF CONTAMINATED EGGS BY LAYING HENS INFECTED WITH STRAINS OF SALMONELLA ENTERITIDIS AND SALMONELLA HEIDELBERG -
Gast, R.K., Bouldin, J.G., Holt, P.S. 2005. The relationship between the duration of fecal shedding and the production of contaminated eggs by laying hens infected with strains of salmonella enteritidis and salmonella heidelberg. Avian Diseases. Vol 49:382-386.
CROP IMMUNE RESPONSE POST-SALMONELLA ENTERITIDIS CHALLENGE IN EIGHT COMMERCIAL LAYER BREED-STRAINS AND SPECIFIC-PATHOGEN-FREE (SPF)WHITE LEGHORNS -
EFFECT OF EGG REFRIGERATION ON THE IN VITRO PENETRATION OF SALMONELLA ENTERITIDIS THROUGH THE YOLK MEMBRANE. -
Gast, R.K., Holt, P.S. 2005. Effect of egg refrigeration on the in vitro penetration of salmonella enteritidis through the yolk membrane. Poultry Science Association. 84(1):77.
COMPARISON OF LEVELS OF SALMONELLA ENTERICA SEROVAR ENTERITIDIS CONTAMINATION OF FLIES OBTAINED FROM ROOMS CONTAINING MOLTED OR NONMOLTED INFECTED HENS -
Holt, P.S., Geden, C.J., Moore, R.W., Gast, R.K. 2005. Comparison of levels of salmonella enterica serovar enteritidis contamination of flies obtained from rooms containing molted or nonmolted infected hens. Western Poultry Disease Conference.
THE RELATIONSHIP BETWEEN INTESTINAL PERSISTENCE AND EGG CONTAMINATION FOR STRAINS OF SALMONELLA ENTERITIDIS AND S. HEIDELBERG -
Gast, R.K., Bouldin, J.G., Holt, P.S. 2005. The relationship between intestinal persistence and egg contamination for strains of salmonella enteritidis and s. heidelberg. Program of American Association of Avian Pathologists Annual Meeting. p.43
PENETRATION OF SALMONELLA ENTERITIDIS AND S. HEIDELBERG INTO EGG YOLKS IN AN IN VITRO CONTAMINATION MODEL -
Gast, R.K., Holt, P.S., Murase, T. 2005. Penetration of salmonella enteritidis and s. heidelberg into egg yolks in an in vitro contamination model. Poultry Science. 84:621-625
GROWTH OF SALMONELLA ENTERICA SEROVAR ENTERITIDIS IN ALBUMEN AND YOLK CONTENTS OF EGGS INOCULATED WITH THIS ORGANISM ONTO THE VITELLINE MEMBRANE -
Murase, T., Holt, P.S., Gast, R.K. 2005. Growth of salmonella enterica serovar enteritidis in albumen and yolk contents of eggs inoculated with this organism onto the vitelline membrane. Journal of Food Protection. 68(4):718-721.
BACTERIAL CONTAMINATION OF EGGS -
Gast, R.K. 2005. Bacterial contamination of eggs. In Food Safety Control in the Poultry Industry. G.C. Mead, ed. Woodhead Publishing, Cambridge, UK, p. 1-20.
PENETRATION OF SALMONELLA ENTERITIDIS AND S. HEIDELBERG THROUGH THE VITELLINE MEMBRANE IN AN IN VITRO EGG CONTAMINATION MODEL -
Gast, R.K., Holt, P.S., Murase, T. 2005. Penetration of salmonella enteritidis and s. heidelberg through the vitelline membrane in an in vitro egg contamination model. Proceedings of the International Poultry Scientific Forum. 84(1):93.
HIGH EFFICIENCY ELECTROSTATIC SAMPLER FOR BIOAEROSOLS -
Mitchell, B.W., Gast, R.K. 2005. High efficiency electrostatic sampler for bioaerosols. Agricultural Safety and Health American Society of Agricultural Engineers.
DETECTION OF SPECIFIC ANTIBODY RESPONSES TO SALMONELLA ENTERITIDIS IN LUNG WASH SAMPLES FROM INFECTED HENS -
Holt, P.S., Stone, H.D., Gast, R.K., Moore, R.W. 2005. Detection of specific antibody responses to salmonella enteritidis in lung wash samples from infected hens. International Poultry Forum Proceedings.
DEPOSITION OF SALMONELLA HEIDELBERG INSIDE EGGS IN EXPERIMENTAL INFECTION STUDIES -
Gast, R.K., Bouldin, J.G., Holt, P.S. 2004. Deposition of Salmonella Heidelberg Inside Eggs in Experimental Infection Studies. United States Animal Health Association Proceedings. p.42.
Molt and Salmonella Co Infection -
Holt, P.S., Gast, R.K., Moore, R.W. 2004. Molt and Salmonella Co Infection. United States Animal Health Association Proceedings.
COLONIZATION OF REPRODUCTIVE ORGANS AND INTERNAL CONTAMINATION OF EGGS AFTER EXPERIMENTAL INFECTION OF LAYING HENS WITH SALMONELLA HEIDELBERG AND SALMONELLA ENTERITIDIS -
Gast, R.K., Bouldin, J.G., Holt, P.S. 2004. Colonization of reproductive organs and internal contamination of eggs after experimental infection of laying hens with salmonella heidelberg and salmonella enteritidis. Avian Diseases. 48:863-869
PRODUCTION OF INTERNALLY CONTAMINATED EGGS BY LAYING HENS INFECTED EXPERIMENTALLY WITH SALMONELLA HEIDELBERG -
Gast, R.K., Holt, P.S., Bouldin, J.G. 2004. Production of Internally Contaminated Eggs by Laying Hens Infected Experimentally With Salmonella Heidelberg. Program of American Association of Avian Pathologists Annual Meeting. p.38.
DETECTION AND CONTROL OF SALMONELLA ENTERITIDIS IN EGG LAYING CHICKENS -
Gast, R.K. 2004. Detection and Control of Salmonella Enteritidis in Egg Laying Chickens. Institute of Food Technologies Proceedings, p.235, 2004.
EVALUATION OF CULTURE MEDIA FOR DETECTING AIRBORNE SALMONELLA ENTERITIDIS COLLECTED WITH AN ELECTROSTATIC SAMPLING DEVICE FROM THE ENVIRONMENT OF EXPERIMENTALLY INFECTED LAYING HENS -
Gast, R.K., Mitchell, B.W., Holt, P.S. 2004. Evaluation of Culture Media for Detecting Airborne Salmonella Enteritidis Collected With an Electrostatic Sampling Device from the Environment of Experimentally Infected Laying Hens. Poultry Science v.83 p.1106-1111, 2004.
INCUBATION OF EGG CONTENTS POOLS AT AN ELEVATED TEMPERATURE (42EC) DOES NOT IMPROVE THE RAPID DETECTION OF SALMONELLA ENTERITIDIS PHAGE TYPE 14B -
Gast, R.K., Holt, P.S. 2004. Incubation of Egg Contents Pools at an Elevated temperature (42 degrees Centigrade) Does Not Improve the Rapid Detection of Salmonella Enteritidis Phage Type 14b. Journal of Food Protection. 67(8):751-1754.
SUBPOPULATION BEHAVIOR OF EGG-CONTAMINATING SALMONELLA ENTERICA SEROVAR ENTERITIDIS AS DEFINED BY LIPOPOLYSACCHARIDE O CHAIN -
Bouldin, J.G., Gast, R.K., Humphrey, T.J., Henzler, D.J., Morales, C., Coles, K. 2004. Subpopulation Behavior Of Egg-Contaminating Salmonella Enterica Serovar Enteritidis As Defined By Lipopolysaccharide O Chain. Applied and Environmental Microbiology v.70, p.2756-2763, 2004.
SUBPOPULATION BEHAVIOR OF EGG-CONTAMINATING SALMONELLA ENTERICA SEROVAR ENTERITIDIS AS DEFINED BY LPS MASS -
Guard, J.Y., Gast, R.K., Humphrey, T.J., Henzler, D.J., Morales, C., Coles, K. 2004. Subpopulation Behavior of Egg-Contaminating Salmonella Enterica Serovar Enteritidis as Defined by LPS Mass. 53rd Western Poultry Disease Conference. p. 27
COMPARISON OF METHODS FOR DIFFERENTIATION OF SALMONELLA ENTERICA SEROVAR ENTERITIDIS PHAGE TYPE 4 ISOLATES -
Lopes, V.C., Velayundhan, B.T., Halvorson, D.A., Lauer, D.C., Gast, R.K., Nagaraja, K.V. 2004. Comparison Of Methods For Differentiation Of Salmonella Enterica Serovar Enteritidis Phage Type 4 Isolates. American Journal of Veterinary Research v.65 p.538-543 2004.
DETECTION OF AIRBORNE SALMONELLA ENTERITIDIS IN THE ENVIRONMENT OF EXPERIMENTALLY INFECTED LAYING HENS BY AN ELECTROSTATIC SAMPLING DEVICE -
Gast, R.K., Mitchell, B.W., Holt, P.S. 2004. Detection of airborne salmonella enteritidis in the environment of experimentally infected laying hens by an electrostatic sampling device. Avian Diseases. 48:148-154, 2004.
Effect of Prior Infection with a Different Salmonella Serovar on A Salmonella Enteritidis Infection During Molt. -
Holt, P.S., Gast, R.K. 2004. Effect of Prior Infection with a Different Salmonella Serovar on A Salmonella Enteritidis Infection During Molt. Avian Diseases. 48:160-166.
PATHOGENICITY OF TWO SALMONELLA PULLORUM ISOLATES FROM BACKYARD POULTRY -
Waltman, D., Gast, R.K. 2003. Pathogenicity Of Two Salmonella Pullorum Isolates From Backyard Poultry. Proceedings of the Annual Meeting of the U.S. Animal Health Association Committee on Salmonella. p.25 2003.
DETECTION OF SALMONELLA ENTERITIDIS IN THE ENVIRONMENT OF EXPERIMENTALLY INFECTED LAYING HENS BY AN ELECTROSTATIC AIR SAMPLING DEVICE -
Gast, R.K., Mitchell, B.W., Holt, P.S. 2003. Detection Of Salmonella Enteritidis In The Environment Of Experimentally Infected Laying Hens By An Electrostatic Air Sampling Device. Proceedings of the Congress of the World Veterinary Poultry Association, p.79, 2003.
EVALUATION OF CULTURE MEDIA FOR USE IN DETECTING AIRBORNE SALMONELLA ENTERITIDIS IN THE ENVIRONMENT OF EXPERIMENTALLY INFECTED LAYING HENS WITH AN ELECTROSTATIC SAMPLING DEVICE -
Gast, R.K., Mitchell, B.W., Holt, P.S. 2003. Evaluation Of Culture Media For Use In Detecting Airborne Salmonella Enteritidis In The Environment Of Experimentally Infected Laying Hens With An Electrostatic Sampling Device. United States Animal Health Association Proceedings, p.38, 2003.
USE OF A LIVE ATTENUATED SALMONELLA TYPHIMURIUM VACCINE TO PROTECT HENS AGAINST S. ENTERITIDIS INFECTION WHILE UNDERGOING MOLT -
HOLT, P.S., GAST, R.K., KELLY-AEHLE, S. USE OF A LIVE ATTENUATED SALMONELLA TYPHIMURIUM VACCINE TO PROTECT HENS AGAINST S. ENTERITIDIS INFECTION WHILE UNDERGOING MOLT. AVIAN DISEASES. 2003. 47:656-661.
Effect of elevated incubation temperature (42 Degrees C) On the multiplication and rapid detection of Salmonella Enteritidis in Egg Contents Pools. -
Gast, R.K., Holt, P.S. 2003. Effect of elevated incubation temperature (42 Degrees C) On the multiplication and rapid detection of Salmonella Enteritidis in Egg Contents Pools.. Poultry Science Association Meeting Abstract. p.53-54.
EFFECT OF ELEVATED INCUBATION TEMPERATURE (42 DEGREES C) ON THE MULTIPLICATION AND RAPID DETECTION OF SALMONELLA ENTERITIDIS IN EGG CONTENTS POOLS. -
Gast, R.K., Holt, P.S. 2003. Effect Of Elevated Incubation Iemperature (42 Degrees C) On The Multiplication And Rapid Detection Of Salmonella Enteritidis In Egg Contents Pools. Poultry Science, 2003.V.82(Supplement 1) Abstract, p.53-54.
EFFECT OF PRIOR SERIAL IN VIVO PASSAGE ON THE FREQUENCY OF SALMONELLA ENTERITIDIS CONTAMINATION IN EGGS FROM EXPERIMENTALLY INFECTED LAYING HENS -
GAST, R.K., PETTER, J.G., HOLT, P.S. EFFECT OF PRIOR SERIAL IN VIVO PASSAGE ON THE FREQUENCY OF SALMONELLA ENTERITIDIS CONTAMINATION IN EGGS FROM EXPERIMENTALLY INFECTED LAYING HENS. AVIAN DISEASES. 2003. 47:633-639.
SUBPOPULATION BEHAVIOR OF EGG-CONTAMINATING SALMONELLA ENTERICA SEROVAR ENTERITIDIS AS DEFINED BY LIPOPOLYSACCHARIDE O CHAIN -
Bouldin, J.G., Gast, R.K., Humphrey, T.J., Henzler, D.J., Morales, C., Coles, K. 2003. Subpopulation behavior of egg-contaminating salmonella enterica serovar enteritidis as defined by lipopolysaccharide o chain. Western Poultry Disease Conference.
SYMPOSIUM INTRODUCTION -
Gast, R.K., Ricke, S.C. 2003. Symposium introduction. Poultry Science. 82:964.
SIMPLE AND RAPID METHODS FOR DETECTING SALMONELLA ENTERITIDIS IN RAW EGGS -
SEO, K., HOLT, P.S., STONE, H., GAST, R.K. SIMPLE AND RAPID METHODS FOR DETECTING SALMONELLA ENTERITIDIS IN RAW EGGS. INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY. 2003. 87 139-144
DETECTION OF SALMONELLA ENTERITIDIS IN INCUBATED POOLS OF EGG CONTENTS BY FLUORESCENCE POLARIZATION AND LATERAL FLOW IMMUNODIFFUSION -
GAST, R.K., HOLT, P.S., NASIR, M.S., JOLLEY, M.E., STONE, H.D. DETECTION OF SALMONELLA ENTERITIDIS IN INCUBATED POOLS OF EGG CONTENTS BY FLUORESCENCE POLARIZATION AND LATERAL FLOW IMMUNODIFFUSION. POULTRY SCIENCE. 2003. 82:687-690.
INCUBATION OF SUPPLEMENTED EGG CONTENTS POOLS TO SUPPORT RAPID DETECTION OF SALMONELLA ENTERITIDIS -
GAST, R.K., HOLT, P.S. INCUBATION OF EGG CONTENTS POOLS TO SUPPORT RAPID DETECTION OF SALMONELLA ENTERICA SEROVAR ENTERITIDIS. JOURNAL OF FOOD PROTECTION. 2003. Vol. 66. No.4. p. 656-659 2003.
EFFECT OF IN VIVO PASSAGE ON THE FREQUENCY OF EGG CONTAMINATION BY SALMONELLA ENTERITIDIS IN AN EXPERIMENTAL ORAL INFECTION MODEL IN LAYING HENS -
Gast, R.K., Holt, P.S. 2002. Effect Of In Vivo Passage On The Frequency Of Egg Contamination By Salmonella Enteritidis In An Experimental Oral Infection Model in Laying Hens. United States Animal Health Association Proceedings.
DETECTION OF SALMONELLA ENTERITIDIS (SE)-SPECIFIC IGA ANTIBODIES IN CROP SAMPLES FROM SE-INFECTED CHICKENS -
HOLT, P.S., SEO, K., GAST, R.K., VAUGHN, L.E., STONE, H. DETECTION OF SALMONELLA ENTERITIDIS (SE)-SPECIFIC IGA ANTIBODIES IN CROP SAMPLES FROM SE-INFECTED CHICKENS. POULTRY SCIENCE ASSOCIATION. 2003. 82:67-70.
DEVELOPMENT OF A LAVAGE PROCEDURE TO COLLECT CROP SECRETIONS FROM LIVE CHICKENS FOR STUDYING CROP IMMUNITY -
Holt, P.S., Vaughn, L.E., Gast, R.K., Stone, H.D. 2002. Development Of A Lavage Procedure To Collect Crop Secretions From Live Chickens For Studying Crop Immunity. Avian Pathology. 31:589-592. 2002.
INCUBATION OF EGG CONTENTS POOLS FOR RAPID DETECTION OF SALMONELLA ENTERITIDIS -
Gast, R.K., Holt, P.S. 2002. Incubation of Egg Contents Pools For Rapid Detection Of Salmonella Enteritidis. Poultry Science Association Meeting Abstract.
INTRODUCTION: CURRENT AND FUTURE PROSPECTS FOR INDUCED MOLTING IN LAYING HENS -
Gast, R.K., Ricke, S.C. 2002. Introduction: Current And Future Prospects For Induced Molting In Laying Hens. Poultry Science Meeting.
DETECTION OF EXPERIMENTAL SALMONELLA ENTERITIDIS AND S. TYPHIMURIUM INFECTIONS IN LAYING HENS BY FLUORESCENCE POLARIZATION ASSAY FOR EGG YOLK ANTIBODIES -
Gast, R.K., Nasir, M.S., Jolley, M.E., Holt, P.S., Stone, H.D. 2002. Detection of experimental salmonella enteritidis and s. typhimurium infections in laying hens by fluorescence polarization assay for egg yolk antibodies. Poultry Science.
EFFECT OF PRIOR SERIAL IN VIVO PASSAGE ON THE FREQUENCY OF DEPOSITION OF SALMONELLA ENTERITIDIS IN EGGS FROM EXPERIMENTALLY INFECTED LAYING HENS -
Gast, R.K., Holt, P.S. 2002. Effect Of Prior Serial In Vivo Passage On The Frequency Of Deposition Of Salmonella Enteritidis In Eggs From Experimentally Infected Laying Hens. American Veterinary Medical Association Abstract.
COMPARISON OF THE EFFECTS OF INFECTION WITH SALMONELLA ENTERITIDIS, IN COMBINATION WITH AN INDUCED MOLT, ON SERUM LEVELS OF THE ACUTE PHASE PROTEIN, ALPHAL ACID GLYCOPROTEIN IN HENS -
Holt, P.S., Gast, R.K. 2002. Comparison of the effects of infection with salmonella enteritidis, in combination with an induced molt, on serum levels of the acute phase protein, alphal acid glycoprotein in hens. Poultry Science.
CHARACTERISTICS OF SALMONELLA ENTERITIDIS CONTAMINATION IN EGGS AFTER ORAL, AEROSOL, AND INTRAVENOUS INOCULATION OF LAYING HENS -
Gast, R.K., Holt, P.S. 2002. Characteristics of salmonella enteritidis contamination in eggs after oral, aerosol, and intravenous inoculation of laying hens. Avian Diseases.
SEROLOGICAL DETECTION OF EXPERIMENTAL SALMONELLA ENTERITIDIS INFECTIONS IN LAYING HENS BY FLUORESCENCE POLARIZATION AND ENZYME IMMUNOASSAY -
Gast, R.K., Nasir,, M.S., Jolley,, M.E., Holt, P.S., Stone,, H.D. 2002. Serological detection of experimental salmonella enteritidis infections in laying hens by fluorescence polarization and enzyme immunoassay. Avian Diseases.
DETECTING ANTIBODIES TO SALMONELLA ENTERITIDIS IN SERUM AND EGG YOLKS FROM EXPERIMENTALLY INFECTED LAYING HENS BY FLUORESCENCE POLARIZATION -
Gast, R.K., Jolley, M.E., Nasir, M.S., Holt, P.S., Stone, H.D. 2001. Detecting antibodies to salmonella enteritidis in serum and egg yolks from experimentally infected laying hens by fluorescence polarization. United States Animal Health Association Proceedings.
INTRODUCTION AND PARATYPHOID INFECTIONS -
COMPARISON OF SALMONELLA ENTERITIDIS INFECTION IN HENS MOLTED VIA LONG TERM FEED WITHDRAWAL VS FULL FED WHEAT MIDDLING -
Seo, K., Holt, P.S., Gast, R.K. 2001. Comparison of salmonella enteritidis infection in hens molted via long term feed withdrawal vs full fed wheat middling. Journal of Food Protection.
PULSED-FIELD GEL ELECTROPHORESIS AND DNA SEQUENCE ANALYSIS OF SEVERAL SALMONELLA VIRULENCE GENES REVEALS THE CLOSE GENETIC-RELATEDNESS OF THE MAJOR SALMONELLA ENTERITIDIS PHAGE TYPES -
DETECTION OF EXPERIMENTAL SALMONELLA ENTERITIDIS AND S. TYPHIMURIUM INFECTIONS IN LAYING HENS BY FLUORESCENCE POLARIZATION ASSAY FOR EGG YOLK ANTIBODIES -
Gast, R.K., Nasir,, M.S., Jolley,, M.E., Holt, P.S., Stone,, H. 2001. Detection of experimental salmonella enteritidis and s. typhimurium infections in laying hens by fluorescence polarization assay for egg yolk antibodies. Poultry Science Association Meeting Abstract.
THE PAST, PRESENT, AND FUTURE OF SALMONELLA CONTROL IN POULTRY: THE EXAMPLE OF S. ENTERITIDIS -
Gast, R.K. 2001. The past, present, and future of salmonella control in poultry: the example of s. enteritidis. World Veterinary Poultry Association.
ASSESSING THE FREQUENCY AND CONSEQUENCES OF SALMONELLA ENTERITIDIS DEPOSITION ON THE EGG YOLK MEMBRANE -
Gast, R.K., Holt, P.S. 2001. Assessing the frequency and consequences of salmonella enteritidis deposition on the egg yolk membrane. Poultry Science.
FREQUENCY AND LOCATION OF SALMONELLA ENTERITIDIS CONTAMINATION IN EGGS ASSOCIATED WITH VARIOUS ROUTES OF EXPERIMENTAL INFECTION OF LAYING HENS -
Gast, R.K., Holt, P.S. 2001. Frequency and location of salmonella enteritidis contamination in eggs associated with various routes of experimental infection of laying hens. American Veterinary Medical Association Abstract.
DETERMINATION OF CLOSE GENETIC RELATEDNESS OF THE MAJOR SALMONELLA ENTERITIDIS PHAGE TYPES BY PULSED-FIELD GEL ELECTROPHORESIS AND DNA SEQUENCE ANALYSIS OF SEVERAL SALMONELLA VIRULENCE GENES -
Hudson,C.R.; Garcia,M.; Gast,R.K.; Maurer,J.J., Determination of close genetic relatedness of the major salmonella enteritidis phage types by pulsed-field gel electrophoresis and DNA sequence analysis of several salmonella virulence genes. Avian Diseases issue 45 pg. 875-886
THE RELATIONSHIP BETWEEN THE MAGNITUDE OF THE SPECIFIC ANTIBODY RESPONSE TO EXPERIMENTAL SALMONELLA ENTERITIDIS INFECTION IN LAYING HENS AND THEIR PRODUCTION OF CONTAMINATED EGGS -
Gast, R.K., Holt, P.S. 2001. The relationship between the magnitude of the specific antibody response to experimental salmonella enteritidis infection in laying hens and their production of contaminated eggs. Avian Diseases.
SEROLOGICAL DETECTION OF EXPERIMENTAL SALMONELLA ENTERITIDIS INFECTIONS IN LAYING HENS BY FLUORESCENCE POLARIZATION AND ENZYME IMMUNOASSAY -
Gast, R.K., Nasir,, M.S., Jolley,, M.E., Holt, P.S., Stone,, H.D. 2001. Serological detection of experimental salmonella enteritidis infections in laying hens by fluorescence polarization and enzyme immunoassay. Proceedings of Southern Conference on Avian Diseases.
BACTERICIDAL EFFECTS OF NEGATIVE AIR IONS ON AIRBORNE AND SURFACE SALMONELLA ENTERITIDIS FROM AN ARTIFICIALLY GENERATED AEROSOL -
Seo, K., Mitchell, B.W., Holt, P.S., Gast, R.K. 2001. Bactericidal effects of negative air ions on airborne and surface salmonella enteritidis from an artificially generated aerosol. Journal of Food Protection.
MULTIPLICATION IN EGG YOLK AND SURVIVAL IN EGG ALBUMEN OF SALMONELLA ENTERITIDIS STRAINS OF PHAGE TYPES 4, 8, 13A AND 14B -
Gast, R.K., Holt, P.S. 2001. Multiplication in egg yolk and survival in egg albumen of salmonella enteritidis strains of phage types 4, 8, 13a and 14b. Journal of Food Protection.
ELIMINATION OF EARLY SALMONELLA ENTERITIDIS INFECTION AFTER TREATMENT WITH COMPETITIVE-EXCLUSION CULTURE AND ENROFLOXACIN IN EXPERIMENTALLY INFECTED CHICKS -
Seo, K., Holt, P.S., Gast, R.K., Hofacre, C.L. 2000. Elimination of early salmonella enteritidis infection after treatment with competitive-exclusion culture and enrofloxacin in experimentally infected chicks. Poultry Science.
DEPOSITION OF SALMONELLA ENTERITIDIS ON AND WITHIN EGG YOLKS -
Gast, R.K., Holt, P.S. 2000. Deposition of salmonella enteritidis on and within egg yolks. Poultry Science Association Meeting Abstract.
STRATEGIES AND PROGRAMS FOR CONTROLLING SALMONELLA ENTERITIDIS IN POULTRY AND EGGS -
Gast, R.K. 2000. Strategies and programs for controlling salmonella enteritidis in poultry and eggs. International Seminar on Poultry Production and Pathology Proceedings.
EVALUATION OF A LATERAL FLOW DEVICE FOR DETECTING SALMONELLA ENTERITIDIS IN RAW EGGS AND CHICKEN FECES -
Seo, K., Holt, P.S., Mitchell, B.W., Gast, R.K. 2000. Evaluation of a lateral flow device for detecting salmonella enteritidis in raw eggs and chicken feces. Milk Food and Environmental Sanitarians International Association.
THE RELATIONSHIP BETWEEN SPECIFIC ANTIBODY RESPONSE AND THE DEPOSITION OF SALMONELLA ENTERITIDIS IN EGGS LAID BY EXPERIMENTALLY INFECTED HENS -
Gast, R.K., Holt, P.S. 2000. The relationship between specific antibody response and the deposition of salmonella enteritidis in eggs laid by experimentally infected hens. American Veterinary Medical Association Abstract.
COMPARISON OF EFFECTS OF 14 DAY FEED REMOVAL, 6 DAY FEED REMOVAL/SKIP FEED REGIMEN, AND FEEDING HENS WHEAT MIDDLINGS TO MOLT HENS ON A SALMONELLA ENTERITIDIS INFECTION -
Holt, P.S., Seo, K., Gast, R.K. 2000. Comparison of effects of 14 day feed removal, 6 day feed removal/skip feed regimen, and feeding hens wheat middlings to molt hens on a salmonella enteritidis infection. World Poultry Congress Proceedings.
REMOVAL OF SALMONELLA ENTERITIDIS FROM ROOM ENVIRONMENTS USING NEGATIVE AIR IONIZATION - POSSIBLE ROLE OF BACTERICIDAL ACTIVITIES BY THE IONIZER IN THIS REMOVAL -
Seo, K., Holt, P.S., Mitchell, B.W., Gast, R.K. 2000. Removal of salmonella enteritidis from room environments using negative air ionization - possible role of bactericidal activities by the ionizer in this removal. American Society for Microbiology.
INFLUENCE OF THE LEVEL AND LOCATION OF CONTAMINATION ON THE MULTIPLICATION OF SALMONELLA ENTERITIDIS AT DIFFERENT STORAGE TEMPERATURES IN EXPERIMENTALLY INOCULATED EGGS -
DEPOSITION OF PHAGE TYPE 4 AND 13A SALMONELLA ENTERITIDIS STRAINS IN THE YOLK AND ALBUMEN OF EGGS LAID BY EXPERIMENTALLY INFECTED HENS -
APPLICATION OF THE AGAR GEL PRECIPITIN TEST TO DETECT ANTIBODIES TO SALMONELLA ENTERICA SEROVAR ENTERITIDIS IN SERUM AND EGG YOLKS FROM INFECTED HENS -
HYPORESPONSIVENESS OF THE SYSTEMIC AND MUCOSAL HUMORAL IMMUNE SYSTEMS IN CHICKENS INFECTED WITH SALMONELLA ENTERICA SEROVAR ENTERITIDIS AT ONE DAY OF AGE -
EXPERIMENTAL HORIZONTAL TRANSMISSION OF SALMONELLA ENTERITIDIS STRAINS (PHAGE TYPES 4,8, AND 13A) IN CHICKS -
USE OF NEGATIVE AIR IONIZATION FOR REDUCING AIRBORNE LEVELS OF SALMONELLA ENTERICA SEROVAR ENTERITIDIS IN A ROOM CONTAINING INFECTED CAGED LAYERS -
PERSISTENCE OF SALMONELLA ENTERITIDIS FROM ONE DAY OF AGE UNTIL MATURITY IN EXPERIMENTALLY INFECTED EGG-TYPE CHICKENS -
APPLICATION OF STANDARD AGGLUTINATION TESTS AND FLAGELLA-BASED IMMUNOASSAYS FOR SEROLOGICAL DETECTION OF SALMONELLA PULLORUM INFECTION IN CHICKENS -
SUPPLEMENTING POOLS OF EGG CONTENTS WITH CONCENTRATED ENRICHMENT MEDIA TO IMPROVE RAPID DETECTION OF SALMONELLA ENTERITIDIS -
AIRBORNE HORIZONTAL TRANSMISSION OF SALMONELLA ENTERITIDIS IN MOLTED LAYING CHICKENS -
ASSESSING THE SENSITIVITY OF EGG YOLK ANTIBODY TESTING FOR DETECTING SALMONELLA ENTERITIDIS INFECTIONS IN LAYING HENS -
GROWTH OF SALMONELLA ENTERITIDIS (SE) IN EGG CONTENTS FROM HENS VACCINATED WITH AN SE BACTERIN -
APPLYING TESTS FOR SPECIFIC YOLK ANTIBODIES TO PREDICT CONTAMINATION BY SALMONELLA ENTERITIDIS IN EGGS FROM EXPERIMENTALLY INFECTED LAYING HENS -
INTESTINAL COLONIZATION AND ORGAN INVASION IN CHICKS EXPERIMENTALLY INFECTED WITH SALMONELLA ENTERITIDIS PHAGE TYPE 4 AND OTHER PHAGE TYPES ISOLATED FROM POULTRY IN THE UNITED STATES -
DETECTING INFECTIONS OF CHICKENS WITH RECENT SALMONELLA PULLORUM ISOLATES USING STANDARD SEROLOGICAL METHODS -
SALMONELLA INFECTIONS. PARATYPHOID INFECTIONS -
ARS News Articles
Last Modified: 5/2/2016
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