Skip to main content

Dr. Thomas DeLiberto

Contact Information

Title: Assistant Director

Address: NWRC, 4101 LaPorte Ave, Fort Collins, CO, 80521

Telephone: 970-266-6088

Fax: 970-266-6089



DVM, Washington State University

Ph.D., Range Science, Utah State University

M.S., Wildlife Management, Texas Tech University

B.S., Wildlife Biology, Colorado State University

International Experience:
Canada, Mexico, Costa Rica, Argentina, Peru, Chile, China, Thailand, Vietnam, Cambodia, Laos, Russia, Denmark, Greenland, South Africa

Current Research:

  • Feral swine diseases
  • Influenza
  • Avian diseases
  • White-nose syndrome
  • Bovine tuberculosis
  • One Health



Dr. DeLiberto currently serves as an Assistant Director for the NWRC where he continues to coordinate Wildlife Services' SERS and research projects on diseases, aquaculture, aviation, forestry, chemosensation, wildlife food safety, and economics. Dr. DeLiberto also serves on the Interagency Wild Bird HPAI Steering Committee, the White-Nose Syndrome Executive and Steering Committees, the National Biosurveillance Working Group, and the Foreign Animal Disease Threats Wildlife Task Force. He represents Wildlife Services on the board of directors for the U.S. Animal Health Association and the Wildlife Society's Wildlife Disease Working Group and as vice president for the American Association of Wildlife Veterinarians.

Bevins, S.N., M. Lutman, K. Pedersen, N. Barrett, T. Gidlewski, T.J. DeLiberto, and A.B. Franklin. 2018. Spillover of swine coronaviruses, United States. Emerging Infectious Diseases 24(7):1390-1392. doi: 10.3201/eid2407.172077

Chandler, J.C., L.A. Baeten, D.L. Griffin, T. Gidlewski, T.J. DeLiberto, J.M. Petersen, R. Pappert, J.W. Young, and S.N. Bevins. 2018. A bead-based flow cytometric assay for monitoring Yersinia pestis exposure in wildlife. Journal of Clinical Microbiology 56(7):e00273-18. doi: 10.1128/JCM.00273-18

Ferguson, L., K. Luo, A.K. Olivier, F.L. Cunningham, S. Blackmon, K. Hanson-Dorr, H. Sun, J. Baroch, M.W. Lutman, B. Quade, W. Epperson, R. Webby, T.J. DeLiberto, and X-F. Wan. 2018. Influenza D Virus infection in feral swine populations, United States. Emerging Infectious Diseases 24(6): 1019-1027. doi: 10.3201/eid2406.172102

Li, L., A.S. Bowman, T.J. DeLiberto, M.L. Killian, S. Krauss, J.M. Nolting, M.K. Torchetti, A.M. Ramey, A.B. Reeves, D.E. Stallknecht, R.J. Webby, and X. Wan. 2018. Genetic evidence supports sporadic and independent introductions of subtype H5 low pathogenic avian influenza A viruses from wild birds to domestic poultry in North America. Journal of Virology 92(19):e00913-18. doi: 10.1128/JVI.00913-18

Li, L., T.J. DeLiberto, M.L. Killian, M.K. Torchetti, and X. Wan. 2018. Evolutionary pathway for the 2017 emergence of a novel highly pathogenic avian influenza A(H7N9) virus among domestic poultry in Tennessee, United States. Virology 525:32-39. doi: 10.1016/j.virol.2018.09.003

Pedersen, K., B.S. Schmit, T.J. DeLiberto, J.R. Suckow, A.J. Davis, D. Slate, R.B. Chipman, R.L. Hale, and A.T. Gilbert. 2018. Raccoon (Procyon lotor) biomarker and rabies antibody response to varying oral rabies vaccine bait densities in northwestern Pennsylvania. Heliyon 4(9):e00754. doi: 10.1016/j.heliyon.2018.e00754

Ramey, A.M., T.J. Deliberto, Y. Berhane, D.E. Swayne, and D.E. Stallknecht. 2018. Lessons learned from research and surveillance directed at highly pathogenic influenza A viruses in wild birds inhabiting North America. Virology 518:55-63. doi: 10.1016/j.virol.2018.02.002

Lee, D., M.K. Torchetti, M.L. Killian, T.J. DeLiberto, and D.E. Swayne. 2017. Reoccurrence of avian influenza A (H5N2) virus clade in wild birds, Alaska, USA, 2016. Emerging Infectious Diseases 23(2):365-367.  doi:  10.3201/eid2302.161616

Martin, B.E., H. Sun, M. Carrel, F.L. Cunningham, J.A. Baroch, K.C. Hanson-Dorr, S.G. Young, B. Schmit, J.M. Nolting, K. Yoon, M.W. Lutman, K. Pedersen, K. Lager, A.S. Bowman, R.D. Slemons, D.R. Smith, T. DeLiberto, and X. Wan. 2017. Feral swine in the United States have been exposed to both avian and swine influenza A viruses. Applied and Environmental Microbiology 83:e01346-17. doi: 10.1128/AEM.01346-17

Sleeman, J.M., T. DeLiberto, and N. Nguyen. 2017. Optimization of human, animal, and environmental health by using the One Health approach. Journal of Veterinary Science 18(S1):263-268. doi: 10.4142/jvs.2017.18.S1.263

Xu, Yifei, A.M. Ramey, A.S. Bowman, T.J. DeLiberto, M.L. Killian, S. Krauss, J.M. Nolting, M.K. Torchetti, A.B. Reeves, R.J. Webby, D.E. Stallknecht, and X. Wan. 2017. Low-pathogenic influenza A viruses in North American diving ducks contribute to the emergence of a novel highly pathogenic influenza A(H7N8) virus. Journal of Virology 91(9): e02208-16

DeLiberto, T. and G. Kerin. 2016. Tracking a deadly virus: Highly pathogenic avian influenza in wild birds. The Wildlife Professional 10(6):34-37.

Bailey, E., L. Long, N. Zhao, J.S. Hall, J.A. Baroch, J. Nolting, L. Senter, F.L. Cunningham, G.T. Pharr, L. Hanson, R. Slemons, T.J. DeLiberto, and X. Wan. 2016. Antigenic characterization of H3 subtypes of avian influenza A viruses from North America.Avian Diseases 60:346-353.  doi: 10.1637/11086-041015-Reg.1  

Pedersen, K., D.R. Marks, E. Wang, G. Eastwood, S.C. Weaver, S.M. Goldstein, D.R. Sinnett, and T.J. DeLiberto. 2016. Widespread detection of antibodies to eastern equine encephalitis, West Nile, St. Louis encephalitis, and Turlock viruses in various species of wild birds from across the United States. American Journal of Tropical Medicine and Hygiene 95(1):206-211.  doi: 10.4269/ajtmh.15-0840

Ramey, A.M., E. Spackman, M.K. Torchetti, and T.J. DeLiberto. 2016. Weak support for disappearance and restricted emergence/persistence of highly pathogenic influenza A in North American waterfowl. PNAS 113(43):E6551-E6552.  doi:10.1073/pnas.1614530113  

Sun, H., J. Xue, E. Bailey, Y. Xu, G. Hu, J. Baroch, Y. Zhang, L. Pace, T.J. DeLiberto, and X. Wan. 2016. A quantitative RT-PCR assay for rapid detection of Eurasian-lineage H10 subtype influenza A virus. Virologica Sinica 31(5):444-447.  doi: 10.1007/s12250-016-3826-1

Lycett, S.J., R. Bodewes, A. Pohlmann, J. Banks, K. Bányai, M.F. Boni, R. Bouwstra, A.C. Breed, I.H. Brown, H. Chen, Á. Dán, T.J. DeLiberto, N. Diep, M. Gilbert, S. Hill, H.S. Ip, C.Wen Ke, H. Kida, M.L. Killian, M.P. Koopmans, J.H. Kwon, D.H. Lee, Y.J. Lee, L. Lu, I. Monne, J. Pasick, O.G. Pybus, A. Rambaut, T.P. Robinson, Y. Sakoda, S. Zohari, C.S. Song, D.E. Swayne, M.K. Torchetti, H.J. Tsai, R.A.M. Fouchier, M. Beer, M. Woolhouse, and T. Kuiken. 2016. Role for migratory wild birds in the global spread of avian influenza H5N8. Science 354(6309):213-216.  doi:  1001126/science.aaf8852

Pedersen, K., D.R. Marks, C.L. Afonso, S.R. Stopak, D. Williams-Coplin, K.M. Dimitrov, P.J. Miller, and T.J. DeLiberto. 2016. Identification of avian paramyxovirus serotype-1 in wild birds in the USA. Journal of Wildlife Diseases 52(3):657-662.  doi: 10.7589/2015-10-278  

Bevins, S. N., R. J. Dusek, C. L. White, T. Gidlewski, B. Bodenstein, K. G. Mansfield, P. DeBruyn, D. Kraege, E. Rowan, C. Gillin, B. Thomas, S. Chandler, J. Baroch, B. Schmit, M. J. Grady, R. S. Miller, M. L. Drew, S. Stopak, B. Zscheile, J. Bennett, J. Sengl, C. Brady, H. S. Ip, E. Spackman, M. L. Killian, M. K. Torchetti, J. M. Sleeman, and T. J. Deliberto. 2016. Widespread detection of highly pathogenic H5 influenza viruses in wild birds from the Pacific Flyway of the United States. Scientific Reports 6:28980.  doi: 10.1038/srep288980   

Lee, D-H., J. Bahl, M.K. Torchetti, M.L. Killian, H.S. Ip, T.J. DeLiberto, and D.E. Swayne. 2016. Highly pathogenic avian influenza viruses and generation of novel reassortants, United States, 2014-2015.  Emerging Infectious Diseases 22(7): 1283-1285.  doi: 10.3201/eid2207.160048  

Ip, H.S., R.J. Dusek, B. Bodenstein, M.K. Torchetti, P. DeBruyn, K.G. Mansfield, T. DeLiberto, and J.M. Sleeman. 2016. High rates of detection of clade highly pathogenic avian influenza H5 viruses in wild birds in the Pacific Northwest during the winter of 2014-15. Avian Diseases 60(1):354-358.  doi:10.1637/11137-050815-Reg  

Killian, M.L., M. Kim-Torchetti, N. Hines, S. Yingst, T. DeLiberto, and D-H. Lee. 2016. Outbreak of H7N8 low pathogenic avian influenza in commercial turkeys with spontaneous mutation to highly pathogenic avian influenza. Genome Announcements 4(3): e00457-16.  doi: 10.1128/genomeA.00457-16   

Xu, Y., E. Bailey, E. Spackman, T. Li, H. Wang, L-P. Long, J.A. Baroch, F.L. Cunningham, X. Lin, R.G. Jarman, T.J. DeLiberto, and X-F. Wan. 2016. Limited antigenic diversity in contemporary H7 avian-origin influenza A viruses from North America. Scientific Reports 6:20688.   doi:  10.1038/srep20688  

Arriola, C.S., D.I. Nelson, T.J. Deliberto, L. Blanton, K. Kniss, M.Z. Levine, S.C. Trock, L. Finelli, M.A. Jhung, and the H5 Investigation Group. 2015. Infection risk for persons exposed to highly pathogenic avian influenza A H5 virus-infected birds, United States, December 2014-March 2015. Emerging Infectious Diseases 21(12):2135-2140.   doi: 10.3201/eid2112.150904  

Sun, H., F.L. Cunningham, J. Harris, Y. Xu, L-P. Long, K. Hanson-Dorr, J.A. Baroch, P. Fioranelli, M.W. Lutman, T. Li, K. Pedersen, B.S. Schmit, J. Cooley, X. Lin,  R.G. Jarman, T.J. Deliberto, X-F. Wan. 2015. Dynamics of virus shedding and antibody responses in influenza A virus-infected feral swine. Journal of General Virology 96(9):2569-2578.  doi:10.1099/jgv.0.000225

Carlson, J.C., D.R. Hyatt, J.W. Ellis, D.R. Pipkin, A.M. Mangan, M. Russell, D.S. Bolte, R.M. Engeman, T.J. Deliberto, and G.M. Linz.  2015. Selected highlights from other journals: Mechanical transmission of antimicrobial-resistant Salmonella enterica by starlings to livestock feeding systems. Veterinary Record: 177(13): 341.   doi: 10.1136/vr.h5182

Carlson, J.C., D.R. Hyatt, J.W. Ellis, D.R. Pipkin, A.M. Mangan, M. Russell, D.S. Bolte, R.M. Engeman, T.J. DeLiberto, and G.M. Linz. 2015. Mechanisms of antimicrobial resistant Salmonella enterica transmission associated with starling-livestock interactions. Veterinary Microbiology 179:60-68.  doi: 10.1016/j.vetmic.2015.04.009

Kistler, W.M., D.E. Stallknecht, T.J. DeLiberto, K. Van Why, and M.J. Yabsley. 2015. Subtype-specific influenza A virus antibodies in Canada geese (Branta canadensis). Veterinary Microbiology 177:296-301.   doi: 10.1016/j.vetmic.2015.03.021

Nallar, R., Z. Papp, T. Epp, F.A. Leighton, S.R. Swafford, T.J. DeLiberto, R.J. Dusek, H.S. Ip, J. Hall, Y. Berhane, S.E.J. Gibbs, and C. Soos. 2015. Demographic and spatiotemporal patterns of avian influenza infection at the continental scale, and in relation to annual life cycle of a migratory host. PloS One 10(6):e0130662.  doi: 10.1371/journal.pone.0130662

Ip, H.S., M.K. Torchetti, R. Crespo, P. Kohrs, P. DeBruyn, K.G. Mansfield, T. Baszler, L. Badcoe, B. Bodenstein, V.Shearn-Bochsler,
M.L. Killian, J.C. Pedersen, N. Hines, T. Gidlewski, T.Deliberto, and J.M. Sleeman. 2015. Novel Eurasian highly pathogenic avian influenza A H5 viruses in wild birds, Washington, USA, 2014. Emerging Infectious Diseases 21(5):886-890.  doi: 10.3201/eid2105.142020

Kistler, W.M., D.E. Stallknecht, C. Lebarbenchon, K. Pedersen, D.R. Marks, R. Mickley, T.J. DeLiberto, and M.J. Yabsley. 2015. Influenza A virus H5-specific antibodies in Mute Swans (Cygnus olor) in the USA. Journal of Wildlife Diseases 51(2):523-526. doi: 10.7589/2014-08-192

Pedersen, K., K.L. Pabilonia, T.D. Anderson, S.N. Bevins, C.R. Hicks, J.M. Kloft, and T.J. Deliberto. 2015. Widespread detection of antibodies to Leptospira in feral swine in the United States. Epidemiology and Infection 143:2131-2136.  doi: 10.1017/S0950266814003148.

Algeo, T.P., R.B. Chipman, D. Slate, J.E. Freier, and T.J. DeLiberto. 2014. Predicted wildlife disease-related climate change impacts of specific concern to USDA APHIS Wildlife Services. Proceedings of the 26th Vertebrate Pest Conference 26:210-315.  

Pedersen, K., D.R. Marks, D.M. Arsnoe, S.N. Bevins, E. Wang, S.C. Weaver, R. M. Mickley, and T.J. DeLiberto. 2014. Short Report: Antibody prevalence of select arboviruses in Mute Swans (Cygnus olor) in the Great Lakes region and Atlantic coast of the United States. The American Journal of Tropical Medicine and Hygiene 91(6):1247-1249.  doi: 10.4269/ajtmh.14-0280.

Bevins, S.N., K. Pedersen, M.W. Lutman, J.A. Baroch, B.S. Schmit, D. Kohler, T. Gidlewski, D.L. Nolte, S.R. Swafford, and T.J. DeLiberto. 2014. Large-scale Avian Influenza surveillance in wild birds throughout the United States . PLoSOne 9(8): e104360. doi: 10.1371/journal.pone.0104360.

Scotch, M., Lam, T.T-Y., K.L. Pabilonia, T. Anderson, J. Baroch, D. Kohler, and T.J. DeLiberto. 2014. Diffusion of influenza viruses among migratory birds with a focus on the Southwest United States . Infection, Genetics and Evolution 26:185-193. doi: 10.1016/j.meegid.2014.05.029.

Feng, Z., J.A. Baroch, L.-P. Long, Y. Xu., F.L. Cunningham, K. Pedersen, M.W. Lutman, B.S. Schmit, A.S. Bowman, T.J. DeLiberto, and X.-F. Wan. 2014. Influenza A Subtype H3 viruses in feral swine, United States, 2011-2012. Emerging Infectious Diseases 20(5): 843-846. doi: 10.3201/eid2005.131578.

Pedersen, K., C.R. Quance, S. Robbe-Austerman, A.J. Piaggio, S.N. Bevins, S.M. Goldstein, W.D. Gaston, and T.J. DeLiberto. 2014. Identification of Brucella suis from feral swine in selected states in the USA. Journal of Wildlife Diseases 50(2): 171-179. doi: 10.7589/2013-09-235.

Bevins, S.N., K. Pedersen, M.W. Lutman, T. Gidlewski, and T.J. DeLiberto. 2014.  Consequences associated with the recent range expansion of nonnative feral swine. BioScience Online 64(4): 291-299.  doi: 10.1093/biosci/biu015.

Pedersen, K., D.R. Marks, D.M. Arsnoe, C.L. Afonso, S.N. Bevins, P.J. Miller, A.R. Randall, and T.J. DeLiberto. 2014.  Avian paramyxovirus serotype 1 (Newcastle disease virus), avian influenza virus, and Salmonella spp. in mute swans (Cygnus olor) in the Great Lakes region and Atlantic coast of the United States.  Avian Diseases 58(1): 129-136.  doi: 10.1637/10638-081413-Reg.1.

Pedersen, K., Marks, D.R., Arsnoe, D.M., Afonso, C.L., Bevins, S.N., Miller, P.J., Randall, A.R. and DeLiberto, T.J., 2013. Avian paramyxovirus serotype 1 (Newcastle disease virus), avian influenza virus, and salmonella spp. in mute swans (Cygnus olor) in the great lakes region and Atlantic coast of the United States. Avian diseases58(1), pp.129-136. .  

Pedersen, K. S.N. Bevins, J.A. Baroch, J.C. Cumbee, Jr., S.C. Chandler, B.S. Woodruff, T.T. Bigelow, and T.J. DeLiberto. 2013. Pseudorabies in feral swine in the United States, 2009-2012. Journal of Wildlife Diseases 49(3): 709-713.

Walter, W.D., J.W. Fischer, C.W. Anderson, D.R. Marks, T. DeLiberto, W. Robbe-Austerman, K.C. VerCauteren. 2013. Surveillance and movements of Virginia opossum (Didelphis virginiana) in the bovine tuberculosis region of Michigan. Epidemiology and Infection 141: 1498-1503. doi: 10.1017/S0950268813000629.

Wang C, Y. Zhang, B. Wu, S. Liu, P. Xu, Y. Lu, J. Luo, D..L. Nolte, T.J. Deliberto, M .Duan H. Zhang, and H. He. 2013. Evolutionary characterization of the pandemic H1N1/2009 influenza virus in humans based on non-structural genes. PLoS ONE 8(2): e56201. doi:10.1371/journal.pone.0056201.
Complementary Content