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Gregory Tyson PhD.

Gregory Tyson

Gregory Tyson, PhD
Gregory Tyson PhD.

Division of Animal and Food Microbiology


Dr. Gregory Tyson received his PhD in microbiology from Northwestern University, working to understand bacterial virulence in the opportunistic human pathogen Pseudomonas aeruginosa. In 2014, Dr. Tyson joined the FDA as a microbiologist, first as a post-doctoral fellow, and subsequently as a full-time employee. His research primarily supports the National Antimicrobial Resistance Monitoring System (NARMS), which monitors antimicrobial resistance of foodborne pathogens isolated from animals, retail meats, and humans.


Dr. Tyson’s research focuses on several different areas, including

  • Understanding antimicrobial resistance of foodborne pathogens using whole-genome sequencing, which includes work with Salmonella, Enterococcus, E. coli, and Campylobacter
  • Tracking emerging antimicrobial resistance to drugs of human health importance
  • Correlating the presence of antimicrobial resistance determinants with phenotypic susceptibility testing
  • Source attribution of human foodborne illness

Select Publications

Tyson GH, Tate HP, Abbott J, Tran T, Kabera C, Crarey E, Young S, McDermott PF, Sprague G, Campbell M, Adeyemo O, Browne-Silva J, Myers M, Thitaram S, Zhao S. Molecular subtyping and source attribution of Campylobacter isolated from food animals. J Food Prot. 2016 Nov.

McDermott PF, Tyson GH, Kabera C, Chen Y, Li C, Folster JP, Ayers SL, Lam C, Tate HP, Zhao S. The use of whole-genome sequencing for detecting antimicrobial resistance in nontyphoidal Salmonella. Antimicrob Agents Chemother. 2016 Aug 22; 60(9):5515–20.

Tyson GH, Li C, Ayers SL, McDermott PF, Zhao S. Using whole-genome sequencing to determine appropriate streptomycin epidemiological cutoffs for Salmonella and Escherichia coli. FEMS Microbiol Lett. 2016 Feb; 363(4).

Zhao S, Tyson GH, Chen Y, Li C, Mukherjee S, Young S, Lam C, Folster JP, Whichard JM, McDermott PF. Whole-genome sequencing analysis accurately predicts antimicrobial resistance phenotypes in Campylobacter spp. Appl Environ Microbiol. 2015 Oct 30; 82(2):459–66.

Tyson GH, McDermott PF, Li C, Chen Y, Tadesse DA, Mukherjee S, Bodeis-Jones S, Kabera C, Gaines SA, Loneragan GH, Edrington TS, Torrence M, Harhay DM, Zhao S. Whole-genome sequencing effectively predicts antimicrobial resistance in Escherichia coli. J Antimicrob Chemother. 2015 Oct; 70(10):2763–9.

Contact Information
Gregory Tyson
+1 (240) 402-5426
+1 (301) 210-4685