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Timothy Johnson

Animal Sciences 

  • Assistant Professor of Animal Sciences
CRTN Room 2020
270 S Russell Street
West Lafayette, IN 47907-2041

Area of Expertise: Food Animal Microbiome, Microbial Ecology
Education: B.S., Brigham Young University; Ph.D., Michigan State University; 
Post-doctoral Training: McMaster University, Canada (2013-2015); National Animal Disease Center, ARS, USDA (2015-2017)

Teaching Program
ANSC 66000 Intestinal Microbiology and Immunology
Discussion and critique of recent journal articles related to intestinal microbiology/immunology. The specific areas covered under this forum are: (i) Intestinal microbiology and microbiome, (ii) Food microbiology as it related to gastrointestinal diseases and persistence, (iii) Probiotics and prebiotics - related to intestinal health or pathogen control, and (iv) Mucosal immunity with major emphasis on intestinal immunology and gut health. 

We are discovering key processes and interactions in the animal microbiome, finding alternative growth promoters to antibiotics, and working to maintain food safety in meat products to the public. Our lab has two research goals: 1) to understand the diverse impacts of antimicrobial use in agriculture on microbial communities and antibiotic resistant genes, and the sustainability of these impacts; and 2) to manipulate the microbiome to improve nutrition and health in food animals, largely poultry and swine.

Full list of Dr. Tim Johnson's publications

News Releases

Selected Publications

Wickware, C. L., Johnson, T., & Koziol, J. H. (2019). Composition and diversity of the preputial microbiota in healthy bulls. Theriogenology. doi:10.1016/j.theriogenology.2019.11.002

Etchebarne, B. E., Li , Z., Stedtfeld, R. D., Nicholas, M. C., Williams, M. R., Johnson, T., . . . Hughes, M. J. (2017). Evaluation of Nucleic Acid Isothermal Amplification Methods for Human Clinical Microbial Infection Detection. Frontiers in microbiology, 8, 2211. doi:10.3389/fmicb.2017.02211

Johnson, T., Sylte, M. J., & Looft, T. (2019). In-feed bacitracin methylene disalicylate modulates the turkey microbiota and metabolome in a dose-dependent manner. Scientific reports, 9(1), 8212. doi:10.1038/s41598-019-44338-5

Sylte, M. J., Johnson, T., Meyer, E. L., Inbody, M. H., Trachsel, J., Looft, T., . . . Zhang, Q. (2019). Intestinal colonization and acute immune response in commercial turkeys following inoculation with Campylobacter jejuni constructs encoding antibiotic-resistance markers. Veterinary immunology and immunopathology, 210, 6-14. doi:10.1016/j.vetimm.2019.02.003

Sylte, M. J., Inbody, M. H., Johnson, T., Looft, T., & Line, J. E. (2018). Evaluation of different Campylobacter jejuni isolates to colonize the intestinal tract of commercial turkey poults and selective media for enumeration. Poultry science, 97(5), 1689-1698. doi:10.3382/ps/pex384

Yoder, N. C., Johnson, T. J., Adams, D. E., & Johnson, T. (2007). Near real-time monitoring of bead area damage in rolling tires using arotating wheel model and multi-directional vibration data. 347, 233-238. doi:10.4028/www.scientific.net/KEM.347.233

Jia, B., Raphenya, A. R., Alcock, B., Waglechner, N., Guo, P., Tsang, K. K., . . . Others (2017). CARD 2017: expansion and model-centric curation of the comprehensive antibiotic resistance database. Nucleic acids research, 45(D1), D566–D573.

Johnson, T., Looft, T., Severin, A. J., Bayles, D. O., Nasko, D. J., Wommack, K. E., . . . Allen, H. K. (2017). The In-Feed Antibiotic Carbadox Induces Phage Gene Transcription in the Swine Gut Microbiome. mBio, 8(4), e00709–17.

Sylte, M. J., Looft, T., Johnson, T., Wu, Z., & Zhang, Q. (2017). Development of an experimental model of Campylobacter jejuni intestinal colonization in commercial turkeys. American Association of Immunologists.

Stedtfeld, R. D., Williams, M. R., Fakher, U., Johnson, T., Stedtfeld, T. M., Wang, F., . . . Others (2016). Antimicrobial resistance dashboard application for mapping environmental occurrence and resistant pathogens. FEMS microbiology ecology, 92(3).

Department of Animal Sciences, 270 S Russell Street, West Lafayette, IN 47907 USA, (765) 494-4808

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