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Gregory Tyson PhD.

Gregory Tyson PhD.
Gregory Tyson PhD.

Division of Animal and Food Microbiology


Dr. Gregory Tyson is a research microbiologist in the Division of Animal and Food Microbiology (DAFM). He received his PhD in microbiology from Northwestern University and joined the FDA in 2014. His research primarily supports the National Antimicrobial Resistance Monitoring System (NARMS), which performs One Health antimicrobial resistance surveillance of foodborne pathogens.


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

  • Using next-generation sequencing to understand antimicrobial resistance of foodborne pathogens such as Salmonella, E. coli, Campylobacter, and Enterococcus
  • Tracking emerging antimicrobial resistance to drugs of human health importance
  • Source attribution of human and animal illnesses caused by resistant pathogens

Select Publications

Tyson GH, Li C, Hsu C, Ayers S, Borenstein S, Mukherjee S, Tran T, McDermott PF, Zhao S. The mcr-9 Gene of Salmonella and E. coli is Not Associated with Colistin Resistance in the United States. Antimicrob Agents Chemother. 2020 Jun 8:AAC.00573-20.

Tyson GH, Li C, Hsu C, Bodeis-Jones S, McDermott PF. Diverse Fluoroquinolone Resistance Plasmids from Retail Meat E. coli in the United States. Front Microbiol. 2019 Dec 5;10:2826.

Feldgarden M, Brover V, Haft D, Prasad AB, Tolstoy I, Tyson GH, Zhao S, Hsu C, McDermott PF, Tadesse DA, Morales C, Simmons M, Tillman G, Wasilenko J, Folster JP, and Klimke W. Using the NCBI AMRFinder Tool to Determine Antimicrobial Resistance Genotype-Phenotype Correlations Within a Collection of NARMS Isolates. Antimicrob Agents Chemother. 2019 Oct 22;63(11).

Tyson GH, Li C, Ceric O, Reimschuessel R, Cole S, Peak L, Rankin S. Complete Genome Sequence of a Carbapenem Resistant E. coli Isolate with blaNDM-5 from a Dog in the United States. Microbiol Resour Announc. 2019 Aug 22;8(34).

Tyson GH, Ayers S, Lam C, Miller RA, Martinez MN. Eukaryotic cell culture media affects macrolide MICs but not resistance interpretations for foodborne pathogens. J Glob Antimicrob Resist. 2019 Jun 5;18:45-46.

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