Burner, C., H. G. Perez, A. A. C. Alves, and V. E. Ryman. 2026. Association of differential somatic cell count with antibiotic success following an intramammary infection. Dairy 7:16. doi:10.3390/dairy7010016
Perez, H. G., D. S. Seidel, and T. R. Callaway. 2025. Preharvest animal management controls and intervention options for reducing Escherichia coli O157 and other Shiga toxin-producing E. coli shedding in cattle: A critical analysis. Foodborne Pathog. Dis. doi:10.1177/15353141251386418
Callaway, T. R., H. G. Perez, N. Corcionivoschi, D. Bu, and F. L. Fluharty. 2024. The holobiont concept in ruminant physiology: More of the same, or something new and meaningful to food quality, food security, and animal health? J. Dairy Sci. doi:10.3168/jds.2024-25847
Perez, H. G., C. K. Stevenson, J. M. Lourenco, and T. R. Callaway. 2024. Understanding rumen microbiology: An overview. Encyclopedia 4:148–157. doi:10.3390/encyclopedia4010013
El-Jeni, R., C. Villot, O. Koyun, A. Osorio-Doblado, J. J. Baloyi, J. M. Lourenco, M. Steele, and T. R. Callaway. 2024. “Probiotic” approaches to improving dairy production: Reassessing “magic foo-foo dust.” J. Dairy Sci. 107:1832–1856. doi:10.3168/jds.2023-23831
Carmichael, M. N., M. M. Dycus, J. M. Lourenco, C. B. Welch, D. B. Davis, T. R. Krause, M. J. Rothrock, F. L. Fluharty, T. D. Pringle, and T. R. Callaway. 2024. Ruminal microbiome differences in Angus steers with differing feed efficiencies during the feedlot-finishing phase. Microorganisms 12:536. doi:10.3390/microorganisms12030536
Lourenco, J. M., and T. R. Callaway. 2024. Editorial: Impact of special issue “The microbial population of the gastrointestinal tract of animals: Impacts on host physiology.” Microorganisms
Walker, M. B., M. P. Holton, T. R. Callaway, J. M. Lourenco, and P. L. P. Fontes. 2023. Differences in microbial community composition between uterine horns ipsilateral and contralateral to the corpus luteum in beef cows on day 15 of the estrous cycle. Microorganisms 11:2117. doi:10.3390/microorganisms11082117
Osorio-Doblado, A. M., K. P. Feldmann, J. M. Lourenco, R. L. Stewart, W. B. Smith, L. O. Tedeschi, F. L. Fluharty, and T. R. Callaway. 2023. Forages and Pastures Symposium: Forage biodegradation, advances in ruminal microbial ecology. J. Anim. Sci. 101:1–12. doi:10.1093/jas/skad178
Davis, D. B., S. R. Hernandez, H. M. Johnson, T. R. Callaway, and R. L. Stewart. 2022. Grazing cotton crop residue to reduce winter supplementation cost in late gestation beef cows and assessment of the negative impacts of gossypol on the mixed ruminal microorganism fermentation. Appl. Anim. Sci. 38:433–440. doi:10.15232/aas.2022-02302
Lourenco, J. M., P. R. Broadway, and T. R. Callaway. 2022. The relationship of animal health and management to food safety. Front. Anim. Sci. doi:10.3389/fanim.2022.951316
Lourenco, J. M., C. B. Welch, T. R. Krause, M. A. Wieczorek, F. L. Fluharty, M. J. Rothrock, T. D. Pringle, and T. R. Callaway. 2022. Fecal microbiome differences in Angus steers with differing feed efficiencies during the feedlot-finishing phase. Microorganisms 10:1128. doi:10.3390/microorganisms10061128
Lourenco, J. M., T. R. Krause, C. B. Welch, T. R. Callaway, and T. D. Pringle. 2022. Longitudinal changes of the ruminal microbiota in Angus beef steers. Animals 12:1066. doi:10.3390/ani12091066
Seidel, D. S., J. W. Walker, J. M. Musser, T. R. Whitney, and T. R. Callaway. 2022. Impact of camphor on the in vitro caprine mixed ruminal microorganism fermentation from goats selected for consumption of low and high levels of Juniperus spp. Trans. Anim. Sci. 6:1–9. doi:10.1093/tas/txac097
Seidel, D. S., J. W. Walker, J. M. Musser, T. R. Whitney, and T. R. Callaway. 2022. Impact of concentrations of camphor on the in vitro caprine mixed ruminal microorganism fermentation from goats selected for consumption of low and high levels of Juniperus spp. 2. Trans. Anim. Sci. 6:1–11. doi:10.1093/tas/txac098
Williamson, J. R., T. R. Callaway, J. M. Lourenco, and V. E. Ryman. 2022. Characterization of rumen, fecal, and milk microbiota in dairy cows. Front. Microbiol. doi:10.3389/fmicb.2022.984119
Welch, C. B., J. M. Lourenco, T. R. Krause, D. S. Seidel, F. L. Fluharty, T. D. Pringle, and T. R. Callaway. 2021. Evaluation of the fecal microbiome of Angus steers with divergent feed efficiencies across lifespan from weaning to slaughter. Front. Vet. Sci. doi:10.3389/fvets.2021.597405
Krause, T. R., J. M. Lourenco, C. B. Welch, M. J. Rothrock, T. R. Callaway, and T. D. Pringle. 2020. The relationship between the rumen microbiome and carcass merit in Angus steers. J. Anim. Sci. 98:1–12. doi:10.1093/jas/skaa287
Callaway, T. R., M. A. Carr, T. S. Edrington, R. C. Anderson, and D. J. Nisbet. 2009. Diet, Escherichia coli O157, and cattle: A review after 10 years. Curr. Issues Mol. Biol. 11:67–80.
Callaway, T. R., T. S. Edrington, R. C. Anderson, J. A. Byrd, and D. J. Nisbet. 2007. Gastrointestinal microbial ecology and the safety of our food supply as related to Salmonella. J. Anim. Sci. 86(E. Suppl.):163–172
Callaway, T. R., R. C. Anderson, T. S. Edrington, R. O. Elder, K. J. Genovese, K. M. Bischoff, T. L. Poole, Y. S. Jung, R. B. Harvey, and D. J. Nisbet. 2003. Preharvest intervention strategies to reduce food-borne pathogens in food animals. J. Anim. Sci. 81(E. Suppl. 2):17–24
Callaway, T. R., R. O. Elder, J. E. Keen, R. C. Anderson, and D. J. Nisbet. 2003. Forage feeding to reduce preharvest E. coli populations in cattle: A review. J. Dairy Sci. 86:852–860
Diez-Gonzalez, F., T. R. Callaway, M. Kizoulis, and J. B. Russell. 1998. The potential link between grain feeding and the dissemination of acid-resistant Escherichia coli from cattle. Science 281:1666–1668
Perez, H. G., and T. R. Callaway. 2025. Enteric foodborne pathogens: Shiga toxin-producing E. coli, Salmonella, and Campylobacter. Pages 295–304 in Rumen Health Compendium. 2nd ed. L. O. Tedeschi and T. G. Nagaraja, eds. Kendall Hunt, Dubuque, IA.
Perez, H. G., C. K. Stevenson, and T. R. Callaway. 2025. Preharvest stress and food safety risks in sheep and goats. Pages 377–393 in Small Ruminant Welfare, Production and Sustainability. G. Kannan, ed. Academic Press.
Perez, H. G., S. C. Ricke, and T. R. Callaway. 2025. Escherichia coli in poultry meat. In Improving Poultry Meat Safety and Sustainability. S. C. Ricke, ed. Francis Dodds Science Publishing, Cambridge, UK.
Callaway, T. R., S. A. Martin, T. S. Edrington, K. J. Genovese, R. C. Anderson, and D. J. Nisbet. 2004. Rumen microbiology. Pages 773–776 in Encyclopedia of Animal Science. A. W. Bell and W. G. Pond, eds. Marcel Dekker Inc., New York, NY.
Callaway, T. R., T. S. Edrington, R. C. Anderson, T. L. Poole, K. M. Bischoff, K. J. Genovese, and D. J. Nisbet. 2004. Microbial ecological principles underlying preharvest intervention strategies. Pages 129–139 in Pre-Harvest and Post-Harvest Food Safety: Contemporary Issues and Future Directions. R. Beier, R. Ziprin, S. Pillai, and T. Phillips, eds. Blackwell Publishing, Ames, IA.
Poole, T. L., K. J. Genovese, R. C. Beier, T. R. Callaway, and K. M. Bischoff. 2004. Antibiotic resistance and the microflora of the gastrointestinal tract. Pages 213–226 in Pre-Harvest and Post-Harvest Food Safety: Contemporary Issues and Future Directions. R. Beier, R. Ziprin, S. Pillai, and T. Phillips, eds. Blackwell Publishing, Ames, IA.
Callaway, T. R., K. D. Dunkley, R. C. Anderson, T. S. Edrington, K. J. Genovese, T. L. Poole, R. B. Harvey, and D. J. Nisbet. 2005. Probiotics, vaccines, and other intervention strategies. Pages 192–213 in Raw Material Safety: Meat. J. N. Sofos, ed. Woodhead Publishing, Cambridge, UK.
Anderson, R. C., K. J. Genovese, R. B. Harvey, T. R. Callaway, and D. J. Nisbet. 2006. Preharvest food safety applications of competitive exclusion cultures and probiotics. Pages 273–284 in Probiotics in Food Safety and Human Health. I. Goktepe, V. K. Juneja, and M. Ahmedna, eds. Taylor and Francis, New York, NY.
Perez, H. G., A. Osorio-Doblado, C. M. Burner, J. M. Lourenco, F. L. Fluharty, and T. R. Callaway. 2026. Effects of DMI and ADG following an abrupt dietary shift to high- and low-quality forage in beef cattle. American Society of Animal Science National Meeting, Madison, WI, July 19–23.
Perez, H. G., A. Osorio-Doblado, J. M. Lourenco, F. L. Fluharty, and T. R. Callaway. 2026. Cattle dietary component and composition impacts fecal E. coli shedding in Angus cattle. VTEC, Aberdeen, Scotland, May 10–13.
Perez, H. G., A. Osorio-Doblado, K. P. Feldmann, M. M. Dycus, C. M. Burner, S. Locke, J. M. Lourenco, F. L. Fluharty, and T. R. Callaway. 2026. Abrupt dietary shifts as a preharvest food safety intervention strategy leads to profound shifts in the ruminant gastrointestinal microbiome in feedlot cattle. Congress on Gastrointestinal Function, Urbana, IL, April 20–22.
Perez, H. G., A. Osorio-Doblado, C. M. Burner, K. P. Feldmann, J. M. Lourenco, V. E. Ryman, F. L. Fluharty, and T. R. Callaway. 2025. Evaluating effects of an abrupt shift to varying forage qualities on E. coli and coliform shedding in beef cattle. American Society of Animal Science National Meeting, Hollywood, FL, July 6–10.
Osorio-Doblado, A., H. G. Perez, and T. R. Callaway. 2025. Microbial relationships with the ruminant animal: Impacts on sustainability, production, and animal health. Tri-Partite Ruminant Nutrition Conference, Beijing, China, April 15–17.
Osorio-Doblado, A., M. M. Dycus, U. Lamichhane, K. P. Feldmann, C. K. Stevenson, H. G. Perez, F. L. Fluharty, J. M. Lourenco, and T. R. Callaway. 2024. Effect of abrupt transition from high-concentrate diets to endophyte-free tall fescue and alfalfa mixed hay in beef cattle. International Symposium on Ruminant Physiology, Chicago, IL, August 26–29.
Osorio-Doblado, A. M., K. P. Feldmann, J. M. Lourenco, R. L. Stewart, W. B. Smith, L. O. Tedeschi, F. L. Fluharty, and T. R. Callaway. 2023. Forages and Pastures Symposium: Forage biodegradation, advances in ruminal microbial ecology. J. Anim. Sci. 101:1–12. doi:10.1093/jas/skad178.
