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United States Department of Agriculture

Agricultural Research Service

Torey Looft

Research Microbiologist


Torey Looft

National Animal Disease Center                                                                  

Research Microbiologist

Food Safety and Enteric Pathogens Research Unit


Phone (515) 337-7140

P.O. BOX 70


AMES, IA  50010



1997-2001 Bowling Green State University; major, Biology; BS, 2002

2002-2005 Bowling Green State University; major, Conservation Biology; MS.

2007-2012 Iowa State University; major, Microbiology; Ph.D. 2012

2012-2013 GS-11, Postdoctoral Research Microbiologist, USDA, ARS, NADC

2013-Present GS-13, Research Microbiologist, USDA, ARS, NADC


1. Investigate the effects of antibiotics and non-antibiotic feed additives on the expression and transmission of virulence, fitness or antimicrobial resistance genes in intestinal microbial populations. 

2. Characterize host responses to Campylobacter spp. colonization and subsequent changes in intestinal microbiota. 

3. Evaluate environmental and host influences on gut bacterial ecological niches and foodborne pathogen control strategies.


Laboratory Personnel:

Technician- Lisa Lai, Biological Science Lab Tech.

Post doc- Timothy Johnson

Morgan Young - Stud. Biol. Sci.

Ann Braverman- Wallace Carver Student


Recent Publications:  Complete list of published work:[Author]


1.   Johnson, T. A., R. D. Stedtfeld, Q. Wang, J. R. Cole, S. A. Hashsham, T. Looft, Y.-  

      G. Zhu and J. M. Tiedje. "Clusters of Antibiotic Resistance Genes Enriched Together    

      Stay Together in Swine Agriculture." mBio 7(2). 2016.

2.   Looft T., D. O. Bayles, D. P. Alt, T. B. Stanton.  Complete genome sequence of   
Coriobacteriaceae Strain 68-1-3, a novel mucus- degrading isolate from the swine  
 intestinal tract.  Genome Announc. 3: e01143.  2015.

3.  Looft T., H. K. Allen, T. A. Casey, D. P. Alt, T. B. Stanton.  Carbadox has both  

temporary and lasting effects on the swine gut microbiota.  Front Microbiol 5: 276.  2014.

4.     Allen H.K., J. Trachsel, T.Looft, T. A. Casey.  Finding alternatives to antibiotics.  Annals of the New York Academy of Sciences 1323(1): 91-100.  2014.

5.     Looft, T., H. K. Allen, B. L. Cantarel, U. Y. Levine, D. O. Bayles, D. P. Alt, B. Henrissat, T. B. Stanton.  Bacteria, phages, and pigs: The effects of in-feed antibiotics on the microbiome at different gut locations.  ISME J. 8: 1566-1576.  2014. 

6.     Bearson S. M. D., H. K. Allen, B. L. Bearson, T. Looft, B.W. Brunelle, J. D. Kich, C. K. Tuggle, D. O. Bayles, D. Alt, U. Y. Levine, T. B. Stanton.  Profiling the gastrointestinal microbiota in response to Salmonella: low versus high Salmonella shedding in the porcine host.  Infect Genet Evol 16: 330-340.  2013.

7.     Allen H. K., U. Y. Levine, T. Looft, M. Bandrick, T. A. Casey.  Treatment, promotion, commotion: Antibiotic alternatives in food-producing animals.  Trends in microbiology 21: 114-119.  2013. 

8.     Looft T., U. Y. Levine, and T. B. Stanton.  Cloacibacillus porcorum sp. nov.,-a mucin-degrading bacterium from the swine intestinal tract.  Int. J. Syst. Evol. Microbiol. 63: 1960-1966.  2013.  



Last Modified: 9/6/2016
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