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United States Department of Agriculture

Agricultural Research Service

Research Project: Optimizing the Biology of the Animal-Plant Interface for Improved Sustainability of Forage-Based Animal Enterprises

Location: Forage-Animal Production Research

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

The effects of steroid implant and dietary soybean hulls on estrogenic activity of sera of steers grazing toxic endophyte-infected tall fescue pasture - (Peer Reviewed Journal)
Shappell, N.W., Flythe, M.D., Aiken, G.E. 2015. The effects of steroid implant and dietary soybean hulls on estrogenic activity of sera of steers grazing toxic endophyte-infected tall fescue pasture. Frontiers in Veterinary Science. DOI: 10.3389/fvets.2015.00030.
From the Lab Bench: Plant secondary metabolites: The good and the bad. - (Popular Publication)
Aiken, G.E. 2015. From the Lab Bench: Plant secondary metabolites: The good and the bad. . Cow Country News. Pg. 68.
Sample handling factors affecting the enumeration of lactobacilli and cellulolytic bacteria in equine feces - (Peer Reviewed Journal)
(24-Jul-15)
Activities and effects of ergot alkaloids on livestock physiology and production - (Review Article)
Klotz, J.L. 2015. Activities and effects of ergot alkaloids on livestock physiology and production. Toxins. 7:2801-2821; doi:10.3390/toxins7082801.
Physiologic effects of ergot alkaloids: What happens when excretion does not equal consumption? - (Proceedings)
(09-Jul-15)
From the Lab Bench: Should you plant a non-toxic endophyte tall fescue? - (Popular Publication)
Aiken, G.E. 2015. From the Lab Bench: Should you plant a non-toxic endophyte tall fescue? Cow Country News. p. 26.
Grazing management options in meeting objectives of grazing experiments - (Peer Reviewed Journal)
(09-Jun-15)
From the Lab Bench: Why Control Tall Fescue Seed Heads? - (Popular Publication)
Aiken, G.E. 2015. From the Lab Bench: Why Control Tall Fescue Seed Heads?. Cow Country News. Pgs. 34-35.
Switchgrass (Panicum virgatum) fermentation by Clostridium thermocellum and Clostridium beijerinckii sequential culture: effect of feedstock particle size on gas production - (Peer Reviewed Journal)
Flythe, M.D., Elia, N.M., Schmal, M.B., Nokes, S.E. 2015. Switchgrass (Panicum virgatum) fermentation by Clostridium thermocellum and Clostridium beijerinckii sequential culture: effect of feedstock particle size on gas production. Advances in Microbiology. 5:311-316.
The difficulties in reviewing ergovaline - (Proceedings)
(21-Apr-15)
From the Lab Bench: Season Changes in Ergot Alkaloid Concentrations of Toxic Tall Fescue - (Popular Publication)
Aiken, G.E. 2015. From the Lab Bench: Season Changes in Ergot Alkaloid Concentrations of Toxic Tall Fescue. Cow Country News. Pgs. 29-30.
From the Lab Bench: Can cattle meet their nutrient needs on toxic tall fescue pasture? - (Popular Publication)
Aiken, G.E. 2015. From the Lab Bench: Can cattle meet their nutrient needs on toxic tall fescue pasture?. Cow Country News. Pgs. 48-50.
Interaction between a tannin-containing legume and endophyte-infected tall fescue seed on lambs’ feeding behavior and physiology - (Abstract Only)
(18-Mar-15)
Effect of grazing seedhead-suppressed tall fescue pasture on the vasoactivity of serotonin receptors - (Abstract Only)
(18-Mar-15)
Recent investigations of ergot alkaloids incorporated into plant and/or animal systems - (Review Article)
Klotz, J.L., Smith, D.L. 2015. Recent investigations of ergot alkaloids incorporated into plant and/or animal systems. Front. Chem. 3:23. doi: 10.3389/fchem.2015.00023.
Hops (Humulus lupulus) ß-acid as an inhibitor of caprine rumen hyper-ammonia-producing bacteria in vitro - (Peer Reviewed Journal)
Flythe, M.D., Aiken, G.E., Gellin, G.L., Klotz, J.L., Goff, B.M., Andries, K. 2015. Hops (Humulus lupulus) ß-acid as an inhibitor of caprine rumen hyper-ammonia-producing bacteria in vitro. Agriculture, Food and Analytical Bacteriology. 5:29-36.
From the Lab Bench: Why the heat and cold stresses on tall fescue pasture - (Popular Publication)
Aiken, G.E. 2015. From the Lab Bench: Why the heat and cold stresses on tall fescue pasture. Cow Country News. Pg. 48 http://issuu.com/cowcountrynews/docs/ccnmarch2015/49?e=6680951/11554905.
Vasoconstrictive responses of the testicular and caudal arteries in bulls exposed to ergot alkaloids from tall fescue - (Peer Reviewed Journal)
Aiken, G.E., Burns, M.G., Stowe, H.M., Andrae, J.G., Pratt, S.L. 2015. Vasoconstrictive responses of the testicular and caudal arteries in bulls exposed to ergot alkaloids from tall fescue. Professional Animal Scientist. 31:130-136 doi:10.15232\pas.2014-01373.
Forage nutritive value and steer responses to grazing intensity and seed-head suppression of endophyte-free tall fescue in mixed pastures - (Peer Reviewed Journal)
Goff, B.M., Aiken, G.E., Witt, W.W., Burch, P.L., Schrick, F.N. 2015. Forage nutritive value and steer responses to grazing intensity and seed-head suppression of endophyte-free tall fescue in mixed pastures. Professional Animal Scientist. 31(2):120-129. DOI: 10.15232/pas.2014-01366.
Cases of ergotism in livestock and associated ergot alkaloid concentrations in feed - (Peer Reviewed Journal)
Craig, A.M., Klotz, J.L., Duringer, J.M. 2015. Cases of ergotism in livestock and associated ergot alkaloid concentrations in feed. Front. Chem. 3:8. doi:10.3389/.
Transferring research data to producers - (Popular Publication)
Aiken, G.E. 2015. Transferring research data to producers. Cow Country News. Pgs. 48-50.
Tall fescue seed extraction and partial purification of ergot alkaloids - (Peer Reviewed Journal)
Huihua, J., Fannin, N., Klotz, J.L., Bush, L.P. 2014. Tall fescue seed extraction and partial purification of ergot alkaloids. Frontiers in Chemistry: Chemical Biology. 2:110.
Physiologic effects of ergot alkaloids: What happens when excretion does not equal absorption? - (Abstract Only)
Klotz, J.L. 2015. Physiologic effects of ergot alkaloids: What happens when excretion does not equal absorption?. American Society of Animal Science Southern Section Meeting. Pg. 92.
Vasoconstrictive responses by the carotid and auricular arteries in goats to ergot alkaloid exposure - (Peer Reviewed Journal)
Aiken, G.E., Flythe, M.D. 2014. Vasoconstrictive responses by the carotid and auricular arteries in goats to ergot alkaloid exposure. Frontiers in Chemistry. 2:101. DOI: 10.3389/fchem.2014.00101.
Transcriptome response in different tissues of Lolium arundinaceum to the fungal endophyte Epichloe coenophiala - (Abstract Only)
(21-Oct-14)
Bulls grazing Kentucky 31 tall fescue exhibit impaired growth, semen quality, and decreased semen freezing potential - (Peer Reviewed Journal)
Pratt, S.L., Stowe, H.M., Whitlock, B.K., Strickland, L., Miller, M., Calcatera, S.M., Dimmick, M.D., Aiken, G.E., Schrick, F.N., Long, N.M., Duckett, S.K., Andrae, J.G. 2015. Bulls grazing Kentucky 31 tall fescue exhibit impaired growth, semen quality, and decreased semen freezing potential. Theriogenology. 83:408-414.
Development of a methodology to measure the effect of ergot alkaloids on forestomach motility using real-time wireless telemetry - (Peer Reviewed Journal)
Egert, A.M., Mcleod, K.R., Harmon, D.L., Klotz, J.L. 2014. Development of a methodology to measure the effect of ergot alkaloids on forestomach motility using real-time wireless telemetry. Frontiers in Chemistry: Chemical Biology. 2:90.
Timing and rate of Chaparral treatment affects tall fescue seedhead development and pasture plant densities - (Peer Reviewed Journal)
Goff, B.M., Aiken, G.E., Witt, W.W., Williamson, J.A., Flynn, E.S., Burch, P.L. 2014. Timing and rate of Chaparral treatment affects tall fescue seedhead development and pasture plant densities. Forage and Grazinglands. DOI: 10.2134/FG-2013-0001-RS.
Effect of intake on fasting heat production, respiratory quotient and plasma metabolites measured using the washed rumen technique - (Peer Reviewed Journal)
Kim, D., Mcleod, K.R., Koontz, A.F., Foote, A.P., Klotz, J.L., Harmon, D.L. 2015. Effect of intake on fasting heat production, respiratory quotient and plasma metabolites measured using the washed rumen technique. Animal. 9:58-66.
Effect of fescue toxicosis on whole body energy and nitrogen balance, in situ degradation and ruminal passage rates in Holstein steers - (Peer Reviewed Journal)
Koontz, A.F., Kim, D., Mc Leod, K.R., Klotz, J.L., Harmon, D.L. 2014. Effect of fescue toxicosis on whole body energy and nitrogen balance, in situ degradation and ruminal passage rates in Holstein steers. Animal Production Science. http://dx.doi.org/10.1071/AN14037.
Inhibition of fructan-fermenting equine fecal bacteria and Streptococcus bovis by hops (Humulus lupulus L.) ß-acid - (Peer Reviewed Journal)
Harlow, B.E., Lawrence, L.M., Kagan, I., Flythe, M.D. 2014. Inhibition of fructan-fermenting equine fecal bacteria and Streptococcus bovis by hops (Humulus lupulus L.) ß-acid. Journal of Applied Microbiology. 117:329-339.
Isolating and using sections of bovine mesenteric artery and vein as a bioassay to test for vasoactivity in the small intestine - (Peer Reviewed Journal)
Klotz, J.L., Barnes, A.J. 2014. Isolating and using sections of bovine mesenteric artery and vein as a bioassay to test for vasoactivity in the small intestine. Journal of Visualized Experiments. 92:e52020.
Pretreatment of lignocellulosic biomass using Fenton chemistry - (Peer Reviewed Journal)
Kato, D., Elia, N.M., Flythe, M.D., Lynn, B.C. 2014. Pretreatment of lignocellulosic biomass using Fenton chemistry. Bioresource Technology. 162:273-278.
Effect of acute exposure to ergot alkaloids on short-chain fatty acid absorption and barrier function of isolated bovine ruminal epithelium - (Abstract Only)
Foote, A.P., Penner, G.P., Walpole, M.E., Klotz, J.L., Bush, L.P., Harmon, D.L. 2014. Effect of acute exposure to ergot alkaloids on short-chain fatty acid absorption and barrier function of isolated bovine ruminal epithelium. Joint Meeting of the ADSA, AMSA, ASAS and PSA. 92(E.Suppl.2):874.
Effects of ergot alkaloid exposure on serotonin receptor mRNA in the smooth muscle of the bovine gastrointestinal tract - (Abstract Only)
Klotz, J.L., Kim, D., Foote, A.P., Harmon, D.L. 2014. Effects of ergot alkaloid exposure on serotonin receptor mRNA in the smooth muscle of the bovine gastrointestinal tract. Joint Meeting of the ADSA, AMSA, ASAS and PSA. 92(E.Suppl.2):890.
Analysis of rumen motility patterns using a wireless telemetry system to characterize bovine reticuloruminal contractions - (Abstract Only)
Egert, A.M., Mcleod, K.R., Klotz, J.L., Harmon, D.L. 2014. Analysis of rumen motility patterns using a wireless telemetry system to characterize bovine reticuloruminal contractions. Joint Meeting of the ADSA, AMSA, ASAS and PSA. 92(E.Suppl.2):804.
Effects of fescue toxicosis induced by endophyte-infected tall fescue seed on forestomach epithelial gene expression in Angus steers - (Abstract Only)
Kim, D., Klotz, J.L., Harmon, D.L. 2014. Effects of fescue toxicosis induced by endophyte-infected tall fescue seed on forestomach epithelial gene expression in Angus steers. Joint Meeting of the ADSA, AMSA, ASAS and PSA. 92(E.Suppl.2):898.
Acute exposure to ergot alkaloids from endophyte-infected tall fescue does not alter absorptive or barrier function of the isolated ruminal epithelium - (Peer Reviewed Journal)
Foote, A.P., Penner, G.P., Walpole, M.E., Klotz, J.L., Brown, K.R., Bush, L.P., Harmon, D.L. 2014. Acute exposure to ergot alkaloids from endophyte-infected tall fescue does not alter absorptive or barrier function of the isolated ruminal epithelium. Animal. 8(7):1106-1112.
Bovine lateral saphenous veins exposed to ergopeptine alkaloids do not relax - (Peer Reviewed Journal)
Pesqueira, A., Harmon, D.L., Branco, A.F., Klotz, J.L. 2014. Bovine lateral saphenous veins exposed to ergopeptine alkaloids do not relax. Journal of Animal Science. 92:1213-1218.
Can we graze 300+ days? - (Popular Publication)
Aiken, G.E., Lehmkuhler, J. 2014. Can we graze 300+ days?. Cow Country News. p. 20-21.
Dietary exposure to ergot alkaloids decreases contractility of bovine mesenteric vasculature - (Peer Reviewed Journal)
Egert, A.M., Kim, D., Schrick, F., Harmon, D.L., Klotz, J.L. 2014. Dietary exposure to ergot alkaloids decreases contractility of bovine mesenteric vasculature. Journal of Animal Science. 92:1768-1779.
Thin-layer chromatographic (TLC) separations and bioassays of plant extracts to identify antimicrobial compounds - (Peer Reviewed Journal)
Kagan, I., Flythe, M.D. 2014. Thin-layer chromatographic (TLC) separations and bioassays of plant extracts to identify antimicrobial compounds. Journal of Visualized Experiments. 85:e51411. doi:10.3791/51411.
Ergot alkaloids from endophyte-infected tall fescue decrease reticulo-ruminal epithelial blood flow and volatile fatty acid absorption from a washed reticulorumen - (Peer Reviewed Journal)
Foote, A.P., Kristensen, N.B., Klotz, J.L., Kim, D., Koontz, A.F., Mcleod, K.R., Bush, L.P., Schrick, F.N., Harmon, D.L. 2013. Ergot alkaloids from endophyte-infected tall fescue decrease reticulo-ruminal epithelial blood flow and volatile fatty acid absorption from a washed reticulorumen. Journal of Animal Science. 91:5366-5378.
Effects of toxicosis on bull growth, semen characteristics and breeding soundness evaluation - (Peer Reviewed Journal)
Stowe, H.M., Millar, M., Burns, M.G., Calcatera, S.M., Andrae, J.G., Aiken, G.E., Schrick, F.N., Cushing, T., Bridges, W.C., Pratt, S.L. 2014. Effects of toxicosis on bull growth, semen characteristics and breeding soundness evaluation. Journal of Animal Science. 91:3686-3692.
Diarrhea-associated pathogens, lactobacilli and cellulolytic bacteria in equine feces: responses to antibiotic challenge - (Peer Reviewed Journal)
Harlow, B.E., Lawrence, L.M., Flythe, M.D. 2013. Diarrhea-associated pathogens, lactobacilli and cellulolytic bacteria in equine feces: responses to antibiotic challenge. Veterinary Microbiology. 166:225-232.
Switchgrass (Panicum virgatum) fermentation by sequential culture of Clostridium thermocellum and Clostridium beijerinckii: effect of particle size on gas production - (Abstract Only)
Elia, N.M., Flythe, M.D., Nokes, S.E. 2013. Switchgrass (Panicum virgatum) fermentation by sequential culture of Clostridium thermocellum and Clostridium beijerinckii: effect of particle size on gas production. American Society for Microbiology General Meeting. 207:2476.
Evaluation of PCR-DGGE as a method to recapitulate host phylogeny by fecal microbial community fingerprint - (Abstract Only)
Flythe, M.D., Lawrence, L.M., Strasinger, L.A., Fisher, T.M., Gellin, G.L., Harlow, B.E. 2013. Evaluation of PCR-DGGE as a method to recapitulate host phylogeny by fecal microbial community fingerprint. Congress on Gastrointestinal Function. 67-68.
Dietary exposure to ergot alkaloids decreases contractility of bovine mesenteric vasculature - (Abstract Only)
Egert, A.M., Kim, D., Harmon, D.L., Klotz, J.L. 2013. Dietary exposure to ergot alkaloids decreases contractility of bovine mesenteric vasculature. J. Anim. Sci. Vol. 91, E-Suppl. 2:214.
Bovine lateral saphenous veins exposed to ergopeptine alkaloids do not relax - (Abstract Only)
Klotz, J.L., Pesqueira, A., Branco, A.F., Harmon, D.L. 2013. Bovine lateral saphenous veins exposed to ergopeptine alkaloids do not relax. J. Anim. Sci. Vol. 91, E-Suppl. 2:92.
Effect of endophyte-infected tall fescue seed on ruminal metabolism and physiology in Angus steers - (Abstract Only)
Kim, D.H., Klotz, J.L., Harmon, D.L. 2013. Effect of endophyte-infected tall fescue seed on ruminal metabolism and physiology in Angus steers. J. Anim. Sci. Vo. 91, E-Suppl. 2:522-523.
Equine palmar artery, palmar vein and uterine artery express different populations of vasoactive biogenic amine receptors - (Abstract Only)
Hestad, D.A., Mcdowell, K.J., Klotz, J.L. 2013. Equine palmar artery, palmar vein and uterine artery express different populations of vasoactive biogenic amine receptors. J. Anim. Sci. Vol. 91, E-Suppl. 2:566.
Effect of fescue toxicosis on ruminal kinetics, nitrogen and energy balance in Holstein steers - (Abstract Only)
Koontz, A.F., Foote, A.P., Kim, D.H., Klotz, J.L., Mcleod, K.R., Harmon, D.L. 2013. Effect of fescue toxicosis on ruminal kinetics, nitrogen and energy balance in Holstein steers. J. Anim. Sci. Vol. 91, E-Suppl. 2:92.
Effect of fescue toxicosis on nitrogen and energy balance in Holstein steers - (Abstract Only)
Koontz, A.F., Kim, D.H., Foote, A.P., Bush, L.P., Klotz, J.L., Mcleod, K.R., Harmon, D.L. 2013. Effect of fescue toxicosis on nitrogen and energy balance in Holstein steers. In: Energy and Protein Metabolism and Nutrition in Sustainable Animal Production. 134:67-68.
Number of beef cows exposed toxic tall fescue: small or large? - (Proceedings)
(10-Nov-12)
Post-graze recovery of blood circulation in steers exhibiting fescue toxicosis as influenced by seed head suppression - (Proceedings)
(10-Nov-12)
Steer and tall fescue pasture responses to grazing intensity and chemical seedhead suppression - (Proceedings)
(10-Nov-12)
Alteration of basal metabolic rate in Holstein steers during fescue toxicosis - (Experiment Station)
Koontz, A.F., Foote, A.P., Kim, D., Bush, L.P., Klotz, J.L., Mcleod, K.R., Harmon, D.L. 2014. Alteration of basal metabolic rate in Holstein steers during fescue toxicosis. Kentucky Beef Report. pgs. 7-9.
Evaluation of a rapid determination of heat production and respiratory quotient in Holstein steers using the washing rumen technique - (Experiment Station)
Kim, D., Mcleod, K.R., Klotz, J.L., Koontz, A.F., Foote, A.P., Harmon, D.L. 2014. Evaluation of a rapid determination of heat production and respiratory quotient in Holstein steers using the washing rumen technique. Kentucky Beef Report. pgs. 26-28.
Last Modified: 9/1/2015
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