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Gregory Tyson PhD.

Gregory Tyson PhD.
Gregory Tyson PhD.

Division of One Health Monitoring


Dr. Gregory Tyson is the Director of the Veterinary Laboratory Investigation and Response Network (Vet-LIRN). He received his PhD in microbiology from Northwestern University and joined the FDA in 2014. For several years he performed research to support the National Antimicrobial Resistance Monitoring System (NARMS), which performs One Health antimicrobial resistance surveillance of foodborne pathogens. He joined Vet-LIRN in 2021. Vet-LIRN comprises a network of 46 veterinary diagnostic laboratories that support various efforts within CVM, including performing non-regulatory testing of food or animal samples in response to consumer complaints about CVM-regulated products.


Vet-LIRN’s work focuses in several areas, including

  • Responding to consumer complaints received by CVM’s Office of Surveillance and Compliance, including non-regulatory testing conducted by Vet-LIRN laboratories
  • Development and evaluation of methods by Vet-LIRN laboratories to detect potential issues in CVM-regulated products, with a focus on animal foods
  • Conducting antimicrobial resistance monitoring of foodborne and zoonotic pathogens in animals, using this information as part of One Health AMR monitoring
  • Supporting the COVID-19 pandemic response, including the development and expansion of methods for testing in animals

Select Publications

Mitchell PK, Wang L, Stanhope B, Tyson GH, Timme R, Strain E, Reimschuessel R, Ceric O, Goodman LB. Multi-laboratory evaluation of the Illumina iSeq platform for whole genome sequencing of Salmonella, Escherichia coli, and Listeria. Microb Genom. 2022 Feb;8(2):000717.

Feldgarden M, Brover, Gonzalez-Escalona N, Frye J, Haendiges J, Haft DH, Hoffmann M, Pettengill JB, Prasad AB, Tillman GE, Tyson GH, Klimke W. AMRFinderPlus and the Reference Gene Catalog Enable Exploration of the Genomic Links Among Antimicrobial Resistance, Stress Response, and Virulence. Sci Rep. 2021 Jun 16;11(1):12728.

Tyson GH, Ceric O, Guag J, Nemser S, Borenstein S, et al. Genomics Accurately Predicts Antimicrobial Resistance in Staphylococcus pseudintermedius Collected as Part of Vet-LIRN Resistance Monitoring. Vet Microbiol. 2021 Mar;254:109006.

Cole SD, Peak L, Tyson GH, Reimschuessel R, Ceric O, Rankin SC. New Delhi Metallo-β-Lactamase-5–Producing Escherichia coli in Companion Animals, United States. Emerg Infect Dis. 2020 Feb;26(2):381-383.

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