• Affiliate Associate Professor, Global Health
  • Supervisory Research Immunologist, USGS Western Fisheries Research Center

Western Fisheries Research Center
6505 NE 65th Street
Box 357230
Seattle, WA 98115
United States

Phone Number: 
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Dr. Hansen's Immunology group at Washington Fishery Research Center focuses on immune responses to infection in fish, the development of immune-related tools (mAbs) and reagents for salmonids and the impact of environmental chemicals on immune response potential. We are particularly interested in the effect of endocrine disrupting chemicals on innate immunity.

  • PhD (Oregon State University)
  • BS (University of Wisconsin (Eau Claire))
Country Affiliations 
Health Topics 
  • Environmental Health (incl. Climate Change)
  • Genomics
  • Host-Pathogen Interactions
  • Infectious Diseases
  • Innate Immunity
  • Molecular Immunology
  • Pathobiology
Pathobiology research areas 
DGH Centers, Programs and Initiatives and Affiliated Organizations 

Development of alternative models for studying host-pathogen interactions, comparative immunology


Leet JK, Greer JB, Richter CA, Iwanowicz LR, Spinard E, McDonald J, Conway C, Gale RW, Tillitt DE, Hansen JD. Exposure to 17α-Ethinylestradiol Results in Differential Susceptibility of Largemouth Bass (Micropterus salmoides) to Bacterial Infection. Environ Sci Technol. 2022 Oct 18;56(20):14375-14386. doi: 10.1021/acs.est.2c02250. PMID: 36197672; PMC9583602.

Hansen JD, Ray K, Chen PJ, Yun S, Elliott DG, Conway CM, Calcutt MJ, Purcell MK, Welch TJ, Bellah JP, Davis EM, Greer JB, Soto E. Disruption of the Francisella noatunensis subsp. orientalis pdpA Gene Results in Virulence Attenuation and Protection in Zebrafish. Infect Immun. 2021 Oct 15;89(11):e0022021. doi: 10.1128/IAI.00220-21. PubMed PMID: 34424748; PMCID: PMC8519269.

Hansen JD, Loftin KA, Laughrey Z, Adamovsky O. Neither microcystin, nor nodularin, nor cylindrospermopsin directly interact with human toll-like receptors. Chemosphere. 2021 Jul;274:129623. doi: 10.1016/j.chemosphere.2021.129623. PubMed PMID: 33515847.