Research Project: Reducing Pathogen Contamination Risks and Improving Quality Attributes of Eggs and Egg Products through Housing System Management and Egg Handling Practices

Location: Egg and Poultry Production Safety Research Unit

Publications (Clicking on the reprint icon will take you to the publication reprint.)

Dust sprinkling as an effective method for infecting chickens with wild-type Salmonella Typhimurium and changes in host gut microbiota - (Peer Reviewed Journal)

A live attenuated Salmonella Typhimurium vaccine dose and diluent have minimal effects on the caecal microbiota of layer chickens. - (Peer Reviewed Journal)
Kham, S., Mcwhorter, A., Andrews, D.M., Underwood, G.J., Moore, R.J., Gast, R.K., Chousalkar, K.K. 2024. A live attenuated Salmonella Typhimurium vaccine dose and diluent have minimal effects on the caecal microbiota of layer chickens.. Frontiers in Veterinary Science. https://doi.org/10.3389/fvets.2024.1364731.

Internal organ colonization by Salmonella Enteritidis in layer pullets infected at two different ages during rearing in cage-free housing - (Peer Reviewed Journal)

Cracking the code for high quality eggs: From the beginning to the end - (Popular Publication)
Jones, D.R., Gast, R.K. 2023. Cracking the code for high quality eggs: From the beginning to the end. Food Safety Magazine. https://digitaledition.food-safety.com/october-november-2023/.

Pullet Rearing Conditions and Susceptibility to Experimental Salmonella Enteritidis Infection. - (Abstract Only)
Gast, R.K., Jones, D.R., Guraya, R., Garcia, J.S., Karcher, D.M. 2023. Pullet Rearing Conditions and Susceptibility to Experimental Salmonella Enteritidis Infection. American Association of Avian Pathologists. p.65.

Impact of paddock area stocking density of free-range laying hens on egg and environmental microbiology. - (Peer Reviewed Journal)
Garcia, J.S., Anderson, K.E., Guard, J.Y., Gast, R.K., Jones, D.R. 2023. Impact of paddock area stocking density of free-range laying hens on egg and environmental microbiology. Journal of Applied Poultry Research. https://doi.org/10.1016/j.japr.2023.100338.

Internal organ colonization by salmonella enteritidis in experimentally infected layer pullets after rearing in conventional cage or cage-free housing - (Peer Reviewed Journal)
Gast, R.K., Jones, D.R., Guraya, R., Garcia, J.S., Karcher, D.M. 2023. Internal organ colonization by salmonella enteritidis in experimentally infected layer pullets after rearing in conventional cage or cage-free housing. Journal of Applied Poultry Research. https://doi.org/10.1016/j.japr.2023.100334.

Understanding egg quality - (Proceedings)
Jones, D.R., Gast, R.K. 2022. Understanding egg quality. Australian Poultry Science Symposium. 33.

Salmonella in eggs and egg-laying chickens - (Review Article)
Gast, R.K., Dittoe, D.K., Ricke, S.C. 2022. Salmonella in eggs and egg-laying chickens. Critical Reviews in Microbiology. https://doi.org/10.1080/1040841X.2022.2156772.

Environmental sampling methods' influence on detection of pathogens in cage-free aviary housing - (Peer Reviewed Journal)
Garcia, J.S., Jones, D.R., Gast, R.K., Karcher, D., Erasmus, M.A. 2023. Environmental sampling methods' influence on detection of pathogens in cage-free aviary housing. Poultry Science. https://doi.org/10.1016/j.psj.2022.102381.

Salmonella control in egg-laying chickens: understanding how and why - (Proceedings)
Gast, R.K. 2022. Salmonella control in egg-laying chickens: Understanding how and why. Workshop Proceedings. p. 53-57.

El Saneamiento de Huevos: Áreas De Procesamiento - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Áreas De Procesamiento. Extension Publications. https://www.youtube.com/watch?v=U3K1YQOl_Jk&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=34.

El Saneamiento de Huevos: Áreas Para Empleados - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Áreas Para Empleados. Extension Publications. https://www.youtube.com/watch?v=m8dDodm9mwY&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=37.

El Saneamiento de Huevos: Sistema Auxiliar - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistema Auxiliar. Extension Publications. https://www.youtube.com/watch?v=JJ-1RItun4E&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=33.

El Saneamiento de Huevos: Áreas De Almacenamiento - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Áreas De Almacenamiento. Extension Publications. https://www.youtube.com/watch?v=oGiEL3_nHoA&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=36.

El Saneamiento de Huevos: Enfriadores - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Enfriadores. Extension Publications. https://www.youtube.com/watch?v=jQBL8ti5RLg&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=35.

El Saneamiento de Huevos: Cinta Transportadora Agrícola - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Heitschmidt, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Cinta Transportadora Agrícola. Extension Reports. Available: https://www.youtube.com/watch?v=_lH-hTA5Z-U&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=21.

El Saneamiento de Huevos: Introducción - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Perigen, M., Karcher, D.M. 2022. El Saneamiento de Huevos: Introducción. Extension Publications. Available: https://www.youtube.com/watch?v=ullo_Zcs-MY&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=20.

El Saneamiento de Huevos: Acumulador - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Perigen, M., Karcher, D.M. 2022. El Saneamiento de Huevos: Acumulador. Extension Reports. Available:https://www.youtube.com/watch?v=7fkFkhPfs6c&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=22.

El Saneamiento de Huevos: Lavadora - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Heitschmidt, G.W., Karcher, D.M. 2022. El Saneamiento de Huevos: Lavadora. Extension Reports. Available: https://www.youtube.com/watch?v=IBsctCazB4A&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=23.

El Saneamiento de Huevos: Lavadora - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Heitschmidt, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Lavadora. Extension Publications. https://www.youtube.com/watch?v=IBsctCazB4A&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=23.

El Saneamiento de Huevos: Sistemas de Saneamiento - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Karcher, D. 2022. El Saneamiento de Huevos: Sistemas de Saneamiento. Extension Publications. https://www.youtube.com/watch?v=-XVVJqpqHZI&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=24.

El Saneamiento de Huevos: Sistemas de Saneamiento - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistemas de Saneamiento. Extension Publications. https://www.youtube.com/watch?v=-XVVJqpqHZI&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=24.

El Saneamiento de Huevos: Equipo De Secado De Huevos - (Popular Publication)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Karcher, D.M. 2022. El Saneamiento de Huevos: Equipo De Secado De Huevos. Extension Publications. https://www.youtube.com/watch?v=85mokSPxcc0&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=25.

El Saneamiento de Huevos: Sistemas De Detección De Calidad De Huevos - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistemas De Detección De Calidad De Huevos. Extension Reports. https://www.youtube.com/watch?v=FBBIQhFDwVM&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=26.

El Saneamiento de Huevos: Sistemas De Eliminación De Huevos - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistemas De Eliminación De Huevos. Extension Publications. https://www.youtube.com/watch?v=TQsK_weuSA0&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=27.

El Saneamiento de Huevos: Sistemas De Empaquetado - Parte Superior - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistemas De Empaquetado - Parte Superior. Extension Publications. https://www.youtube.com/watch?v=DDNmMLUPq98&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=30.

El Saneamiento de Huevos: Empaquetado Y Apilado - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Empaquetado Y Apilado. Extension Publications. https://www.youtube.com/watch?v=woT3xxxg2fs&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=32.

El Saneamiento de Huevos: Sistema De Transporte - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistema De Transporte. Extension Publications. https://www.youtube.com/watch?v=MJHWA9EFWvM&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=29.

El Saneamiento de Huevos: Sistemas De Empaquetado - Porción Baja - (Other)
Jones, D.R., Garcia, J.S., Hendricks, J., Barajas, V., Warnock, J., Karcher, D.M. 2022. El Saneamiento de Huevos: Sistemas De Empaquetado - Porción Baja. Extension Publications. https://www.youtube.com/watch?v=EYw0oZ6-7KY&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=31.

Laying hen production and welfare in a cage-free setting is impacted by the northern fowl mite - (Peer Reviewed Journal)
Jarrett, R., Erasmus, M., Murillo, A., Scoles, K., Robison, C., Jones, D.R., Karcher, D.M. 2022. Laying hen production and welfare in a cage-free setting is impacted by the northern fowl mite. Journal of Applied Poultry Research. https://doi.org/10.1016/j.japr.2022.100290.

Internal organ colonization by Salmonella Enteritidis in experimentally infected layer pullets reared at different stocking densities in indoor cage-free housing - (Peer Reviewed Journal)
Gast, R.K., Jones, D.R., Guraya, R., Garcia, J.S., Karcher, D.M. 2022. Internal organ colonization by Salmonella Enteritidis in experimentally infected layer pullets reared at different stocking densities in indoor cage-free housing. Poultry Science. https://doi.org/10.1016/j.psj.2022.102104.

Internal organ colonization by Salmonella Enteritidis in experimentally infected layer pullets reared under different housing conditions - (Abstract Only)
Gast, R.K., Jones, D.R., Guraya, R., Garcia, J.S., Karcher, D.M. 2023. Internal organ colonization by Salmonella Enteritidis in experimentally infected layer pullets reared under different housing conditions. Poultry Science Association Meeting Abstract. 101(1):157-158.

Arising From: “Global spread of Salmonella Enteritidis via centralized sourcing and international trade of poultry breeding stocks” (Nature Communications 12:5109, 2021) - (Other)
Johnson, T., Gast, R.K., Guard, J.Y., Rosales, A.G., Wilson, D. 2022. Arising From: “Global spread of Salmonella Enteritidis via centralized sourcing and international trade of poultry breeding stocks” Li, S., He, Y., Mann, D.A. et al. Global spread of Salmonella Enteritidis via centralized sourcing and international trade of poultry breeding stocks. Nat Commun 12, 5109 (2021).

Understanding egg processing area sanitation - (Other)

Understanding egg packaging systems sanitation - (Other)

Understanding egg processing storage areas sanitation - (Other)
Jones, D.R., Hendricks, J., Warnock, J., Karcher, D. 2022. Understanding egg processing storage areas sanitation. Purdue Extension Publications. https://www.youtube.com/watch?v=cxUjb6qpRLs&list=PLtXSf1tu3Jd-.

Understanding egg processing cooler sanitation - (Other)
Jones, D.R., Hendricks, J., Warnock, J., Karcher, D. 2022. Understanding egg processing cooler sanitation. Extension Publications. https://www.youtube.com/watch?v=SDyQTrlUhUU&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=16.

Understanding egg processing employee welfare areas and general facility sanitation - (Other)
Jones, D.R., Hendricks, J., Warnock, J., Karcher, D. 2022. Understanding egg processing employee welfare areas and general facility sanitation. Extension Publications. https://www.youtube.com/watch?v=AOP4Kje1TDw&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=17.

Tissue colonization and egg and environmental contamination associated with the experimental infection of cage-free laying hens with Salmonella Braenderup. - (Peer Reviewed Journal)
Garcia, J.S., Gast, R.K., Guard, J.Y., Karcher, D.M., Jones, D.R. 2022. Tissue colonization and egg and environmental contamination associated with the experimental infection of cage-free laying hens with Salmonella Braenderup. Avian Diseases. 66:74-78.

Understanding egg processing auxiliary system sanitation - (Other)
Jones, D.R., Hendricks, J., Warnock, J., Karcher, D. 2021. Understanding egg processing auxiliary system sanitation. Purdue Extension Publications. https://www.youtube.com/watch?v=mL4g7RBtozs&list=PLtXSf1tu3Jd-FMRe0wIQYnOyAFpTakk-I&index=14.

Influence of forage substrates on environmental and egg microbiology in cage-free aviary housing flocks. - (Peer Reviewed Journal)
Garcia, J.S., Jones, D.R., Gast, R.K., Robison, C.I., Regmi, P., Karcher, D.M. 2022. Influence of forage substrates on environmental and egg microbiology in cage-free aviary housing flocks. Journal of Applied Poultry Research. https://doi.org/10.1016/j.japr.2021.100225

Contamination of eggs by Salmonella Enteritidis and Salmonella Typhimurium in experimentally infected laying hens in indoor cage-free housing. - (Peer Reviewed Journal)
Gast, R.K., Jones, D.R., Guraya, R., Anderson, K.E., Karcher, D.M. 2021. Contamination of eggs by Salmonella Enteritidis and Salmonella Typhimurium in experimentally infected laying hens in indoor cage-free housing. Poultry Science. 100(11). https://doi.org/10.1016/j.psj.2021.101438.

Floor substrate provided during rearing influences body condition and welfare parameters of commercial white and brown cage free pullets - (Abstract Only)

Contamination of eggs by Salmonella Enteritidis and Salmonella Typhimurium in experimentally infected laying hens in indoor cage-free housing - (Abstract Only)
Gast, R.K., Jones, D.R., Guraya, R., Anderson, K.E., Karcher, D.M. 2021. Contamination of eggs by Salmonella Enteritidis and Salmonella Typhimurium in experimentally infected laying hens in indoor cage-free housing. Poultry Science 100 (E-Suppl.1):118 (Abstr).

Tissue colonization and egg and environmental contamination associated with experimental infection of laying hens with Salmonella Braenderup - (Abstract Only)
Garcia, J.S., Gast, R.K., Jones, D.R. 2021. Tissue colonization and egg and environmental contamination associated with experimental infection of laying hens with Salmonella Braenderup. Poultry Science Association Meeting Abstract. Poultry Science. 100(1):238.

Salmonella control in egg-laying chickens: Understanding how and why - (Proceedings)
Gast, R.K. 2021. Salmonella control in egg-laying chickens: Understanding how and why. Proceedings of Shell Egg Academy, June 21-25, 2021. pp.9-13.

Understanding egg quality detection system sanitation - (Popular Publication)