Thierry M Work
Dr. Thierry M Work is currently the project leader for the National Wildlife Health Center Honolulu Field Station where he leads a team that provides support to safeguard wildlife and ecosystem health through research and technical assistance to federal, state, and international partners.
Professional Experience
1992-Present: Project leader, USGS National Wildlife Health Center Honolulu Field Station
1987-1992: Wildlife veterinarian, California Department of Fish & Game
Education and Certifications
1989 Masters in Preventive Veterinary Medicine, UC Davis
1988 Doctor of Veterinary Medicine, UC Davis
1985 Master Science, Entomology, UC Davis
1983 Bachelor Science, Entomology, Texas A&M
Affiliations and Memberships*
Wildlife Disease Association
Sigma Xi
Science and Products
Epizootiology of spirorchid infection in green turtles (Chelonia mydas) in Hawaii
Evaluating coral reef health in American Samoa
The Ozobranchus leech is a candidate mechanical vector for the fibropapilloma-associated turtle herpesvirus found latently infecting skin tumors on Hawaiian green turtles (Chelonia mydas)
Retrospective pathology survey of green turtles Chelonia mydas with fibropapillomatosis in the Hawaiian Islands, 1993-2003
Mortality in Laysan ducks (Anas laysanensis) by emaciation complicated by Echinuria uncinata on Laysan Island, Hawaii, 1993
Protozoal and epitheliocystis-like infections in the introduced bluestripe snapper (Lutjanus kasmira) in Hawaii
Bacteremia in free-ranging Hawaiian green turtles, Chelonia mydas, with fibropapillomatosis
Toxoplasmosis in three species of native and introduced Hawaiian birds
French Frigate Shoals reef health survey
Necropsy findings in sea turtles taken as bycatch in the North Pacific longline fishery
Immune status of free-ranging green turtles with fibropapillomatosis from Hawaii
Quantitative analysis of herpes virus sequences from normal tissue and fibropapillomas of marine turtles with real-time PCR
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
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Filter Total Items: 167
Epizootiology of spirorchid infection in green turtles (Chelonia mydas) in Hawaii
We describe the epizootiology of spirorchiid trematode infections in Hawaiian green turtles (Chelonia mydas) by quantifying tissue egg burdens in turtles submitted for necropsy and by assessing antibody response to crude adult worm and egg antigens among a variety of age groups. Hapalotrema sp. and Laeredius sp. predominated in turtles infected with spirorchiids. Tissue egg burdens decreased withAuthorsThierry M. Work, George H. Balazs, Jody L. Schumacher, Amarisa MarieEvaluating coral reef health in American Samoa
The study of coral disease has suffered from an absence of systematic approaches that are commonly used to determine causes of diseases in animals. There is a critical need to develop a standardized and portable nomenclature for coral lesions in the field and to incorporate more commonly available biomedical tools in coral disease surveys to determine the potential causes of lesions in corals. WeAuthorsThierry M. Work, Robert A. RameyerThe Ozobranchus leech is a candidate mechanical vector for the fibropapilloma-associated turtle herpesvirus found latently infecting skin tumors on Hawaiian green turtles (Chelonia mydas)
Fibropapillomatosis (FP) of marine turtles is a neoplastic disease of ecological concern. A fibropapilloma-associated turtle herpesvirus (FPTHV) is consistently present, usually at loads exceeding one virus copy per tumor cell. DNA from an array of parasites of green turtles (Chelonia mydas) was examined with quantitative PCR (qPCR) to determine whether any carried viral loads are sufficient to imAuthorsR.J. Greenblatt, Thierry M. Work, G. Balazs, C.A. Sutton, R.N. Casey, J.W. CaseyRetrospective pathology survey of green turtles Chelonia mydas with fibropapillomatosis in the Hawaiian Islands, 1993-2003
We necropsied 255 stranded green turtles Chelonia mydas with fibropapillomatosis (FP) from the Hawaiian Islands, North Pacific, from August 1993 through May 2003. Of these, 214 (84%) were euthanized due to advanced FP and the remainder were found dead in fresh condition. Turtles were assigned a standardized tumor severity score ranging from 1 (lightly tumored) to 3 (heavily tumored). Tumors were cAuthorsThierry M. Work, George H. Balazs, Robert Rameyer, R.A. MorrisMortality in Laysan ducks (Anas laysanensis) by emaciation complicated by Echinuria uncinata on Laysan Island, Hawaii, 1993
In November 1993, unusual mortality occurred among endangered Laysan ducks on Laysan Island, one of the remote refugia of the Northwestern Hawaiian Islands National Wildlife Refuge (USA). Ten live ducks were emaciated, and blood samples documented anemia, heterophilia, and eosinophilia. Pathology in 13 duck carcasses revealed emaciation, marked thickening of the proventricular wall, abundant mucusAuthorsThierry M. Work, Carol U. Meteyer, Rebecca A. ColeProtozoal and epitheliocystis-like infections in the introduced bluestripe snapper (Lutjanus kasmira) in Hawaii
The bluestripe snapper, or taape, was introduced into Hawaii in the 1950s and has since become very abundant throughout the archipelago. As part of a health survey of reef fish in Hawaii, we necropsied 120 taape collected from various coastal areas south of Oahu and examined fish histology for extraintestinal organisms. Forty-seven percent of taape were infected with an apicomplexan protozoan compAuthorsThierry M. Work, Robert Rameyer, Geraldine Takata, Michael L. KentBacteremia in free-ranging Hawaiian green turtles, Chelonia mydas, with fibropapillomatosis
Past studies of free-ranging green turtles Chelonia mydas with fibropapillomatosis (FP) in Hawaii have shown that animals become immunosuppressed with increasing severity of this disease. Additionally, preliminary clinical examination of moribund turtles with FP revealed that some animals were also bacteraemic. We tested the hypothesis that bacteraemia in sea turtles is associated with the severitAuthorsThierry M. Work, G.H. Balazs, M. Wolcott, Robert MorrisToxoplasmosis in three species of native and introduced Hawaiian birds
Toxoplasma gondii was found in endemic Hawaiian birds, including 2 nene geese (Nesochen sandvicensis), 1 red-footed booby (Sula sula), and an introduced bird, the Erckels francolin (Francolinus erckelii). All 4 birds died of disseminated toxoplasmosis; the parasite was found in sections of many organs, and the diagnosis was confirmed by immunohistochemical staining with anti–T. gondii–specific polAuthorsThierry M. Work, J. Gregory Massey, D. S. Lindsay, J. P. DubeyFrench Frigate Shoals reef health survey
French Frigate Shoals (FFS) is one of the refugia comprising the Northwest Hawaiian Islands National Wildlife Refuge (NWHINWR). French Frigate Shoals was discovered by La Perouse in the late 18th century; however, the atoll was most notable as a naval air station during World War II when the US Navy dredged Tern Island into an airstrip, and the US Coast guard established a LORAN station on East IsAuthorsThierry M. Work, Steve L. Coles, Robert RameyerNecropsy findings in sea turtles taken as bycatch in the North Pacific longline fishery
No abstract available.AuthorsThierry M. Work, George H. BalazsImmune status of free-ranging green turtles with fibropapillomatosis from Hawaii
Cell-mediated and humoral immune status of free-ranging green turtles (Chelonia mydas) in Hawaii (USA) with and without fibropapillomatosis (FP) were assessed. Tumored and non-tumored turtles from Kaneohe Bay (KB) on the island of Oahu and from FP-free areas on the west (Kona/Kohala) coast of the island of Hawaii were sampled from April 1998 through February 1999. Turtles on Oahu were grouped (0–3AuthorsThierry M. Work, Robert Rameyer, George H. Balazs, Carolyn Cray, Sandra P. ChangQuantitative analysis of herpes virus sequences from normal tissue and fibropapillomas of marine turtles with real-time PCR
Quantitative real-time PCR has been used to measure fibropapilloma-associated turtle herpesvirus (FPTHV) pol DNA loads in fibropapillomas, fibromas, and uninvolved tissues of green, loggerhead, and olive ridley turtles from Hawaii, Florida, Costa Rica, Australia, Mexico, and the West Indies. The viral DNA loads from tumors obtained from terminal animals were relatively homogenous (range 2a??20 copAuthorsS.L. Quackenbush, R.N. Casey, R.J. Murcek, T.A. Paul, Thierry M. Work, C.J. Limpus, A. Chaves, L. duToit, J.V. Perez, A.A. Aguirre, T.R. Spraker, J.A. Horrocks, L.A. Vermeer, G.S. Balazs, J.W. CaseyNon-USGS Publications**
Beale, A.M., Higgins, R.J., Work, T.M., Bailey, C.S., Smith, M.O., Shinka, T., and Hammock, B.D. (1989). MPTP-induced parkinson-like disease in sheep: Clinical and pathologic findings. Journal of Environmental Pathology and Toxicology 9, 417-428.
Hammock, B.D., Beale, A.M., Work, T.M., Gee, S.J., Gunther, R., Higgins, R.J., Shinka, T., and Castagnoli, N. (1989). A sheep model for MPTP induced parkinson-like symptoms. Life Sciences 45, 1601-1608.
Jessup, D.A., Work, T.M., Bushnell, R., Sawyer, M.M., and Osburn, B.I. (1990). An outbreak of bluetongue in captive deer and adjacent livestock in Kern county, California. California Fish and Game 76, 83-90.
Work, T.M., and Jessup, D.A. (1990). Epidemiology and pathology of hemorrhagic disease in free-ranging black-tailed deer in California: 1986-1987. Transactions of the Western Section of the Wildlife Society 26, 72-76.
Work, T.M., Sawyer, M.M., Jessup, D.A., Washino, R.K., and Osburn, B.I. (1990). Effects of anaesthetization and storage temperature on bluetongue virus recovery from Culicoides variipennis (Diptera: Ceratopogonidae) and sheep blood. Journal of medical entomology 27, 331-333.
Work, T.M., Washino, R.K., and Van RIper, I.I.I., C (1990). Comparative susceptibility of Culex tarsalis, Anopheles franciscanus and Culiseta inornata (Diptera: Culicidae) to Plasmodium relictum (Haemosporidia: Plasmodiiae). Journal of medical entomology 27, 68-71.
Work, T.M., Mullens, B.A., and Jessup, D.A. (1991). Estimation of survival and gonotrophic cycle length of Culicoides variipennis (Diptera; Ceratopogonidae) in California. Journal of the American Mosquito Control Association 7, 242-249.
Fritz, L., Quilliam, M.A., Wright, J.L.C., Beale, A.M., and Work, T.M. (1992). An outbreak of domoic acid poisoning attributed to the pennate diatom Pseudonitzschia australis. J Phycol 28, 439-442.
Work, T.M., Jessup, D.A., and Sawyer, M.M. (1992). Experimental bluetongue and epizootic hemorrhagic disease virus infeciton in black-tailed deer. J Wildl Dis 28, 623-628.
Work, T.M., Barr, B., Beale, A., Fritz, L., Quilliam, M.A., and Wright, J.L.C. (1993). Epidemiology of domoic acid poisoning in brown pelicans (Pelecanus occidentalis) and Brandt's cormorants (Phalacrocorax penicillatus) in California. J Zoo Wildl Med 24, 54-62.
Work, T.M., Beale, A.M., Fritz, L., Quilliam, M.A., Silver, M., Buck, K., and Wright, J. (1993). Domoic acid intoxication of brown pelicans and cormorants in Santa Cruz, California. In Toxic phytoplankton blooms in the sea, T. Smayda, ed. (Copenhagen: Elsiever), pp. 643-649.
Work, T.M., DeLong, R.L., Spraker, T.R., and Melin, S.R. (1993). Halothane anesthesia as a method of immobilizing free-ranging California sea lions (Zalophus californianus). J Zoo Wildl Med 24, 482-487.
Chomel, B.B., Carniciu, M.L., Kasten, R.W., Castelli, P.M., Work, T.M., and Jessup, D.A. (1994). Antibody prevalence of eight ruminant infectious diseases in California mule and black-tailed deer (Odocoileus hemioneus). J Wildl Dis 30, 51-59.
Patton, J.F., Work, T.M., Jessup, D.A., Hietala, S.K., Oliver, M.N., and MacLachlan, N.J. (1994). Serologic detection of bluetongue virus infection of black-tailed deer:comparison of the serum neutralization, agar gel immunodiffusion, and competitive ELISA assays. J Wildl Dis 30, 99-102.
Paul-Murphy, J., Work, T., Hunter, D.B., McFie, E., and Fjelline, D. (1994). Serologic survey and serum biochemical reference ranges of the free-ranging mountain lion (Felis concolor) in California. J Wildl Dis 30, 205-215.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government