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
Overgrowth of fungi (endolithic hypermycosis) associated with multifocal to diffuse distinct amorphous dark discoloration of corals in the Indo-Pacific
Translocation and disease monitoring of wild laysan ducks
Systematically describing gross lesions in corals
Molecular phylogeny of Babesia poelea from brown boobies (Sula leucogaster) from Johnston Atoll, Central Pacific
Coral disease and health workshop: Coral histopathology II, July 12-14, 2005
Evaluating coral reef health in American Samoa
Mortality in the endangered Laysan teal, Anas laysanensis: conservation implications
Epizootiology of spirorchid infection in green turtles (Chelonia mydas) in Hawaii
Geographic variation in marine turtle fibropapillomatosis
Wildlife health and disease investigations
Characterizing lesions in corals from American Samoa
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: 166
Overgrowth of fungi (endolithic hypermycosis) associated with multifocal to diffuse distinct amorphous dark discoloration of corals in the Indo-Pacific
Coral disease surveys in American Samoa and Hawai‘i revealed colonies with a distinct dark discoloration affecting 20–60% of the colony surface (Fig. 1a). In some cases, tissue loss with algal infiltration was present within discolored areas. On microscopy, these lesions had marked overgrowth of the coral skeleton and tissues with septate branching structures that stained positive with Grocott’s MAuthorsThierry M. Work, G.S. Aeby, F.G. Stanton, D. FennerTranslocation and disease monitoring of wild laysan ducks
The Laysan duck (Anas laysanensis), also known as the Laysan teal because of its small size, is a critically endangered waterfowl species that once occurred widely across the Hawaiian Archipelago. For the past 150 years, however, it was restricted to a single population on Laysan, a 4-square-kilometer (1.5-square-mile) island with a hypersaline shallow lake. Laysan is part of the Hawaiian IslandsAuthorsMichelle H. Reynolds, Thierry M. WorkSystematically describing gross lesions in corals
Many coral diseases are characterized based on gross descriptions and, given the lack or difficulty of applying existing laboratory tools to understanding causes of coral diseases, most new diseases will continued to be described based on appearance in the field. Unfortunately, many existing descriptions of coral disease are ambiguous or open to subjective interpretation, making comparisons betweeAuthorsThierry M. Work, Greta S. AebyMolecular phylogeny of Babesia poelea from brown boobies (Sula leucogaster) from Johnston Atoll, Central Pacific
The phylogenetic relationship of avian Babesia with other piroplasms remains unclear, mainly because of a lack of objective criteria such as molecular phylogenetics. In this study, our objective was to sequence the entire 18S, ITS-1, 5.8S, and ITS-2 regions of the rRNA gene and partial ß-tubulin gene of B. poelea, first described from brown boobies (Sula leucogaster) from the central Pacific, andAuthorsMichael J. Yabsley, Thierry M. Work, Robert A. RameyerCoral disease and health workshop: Coral histopathology II, July 12-14, 2005
The health and continued existence of coral reef ecosystems are threatened by an increasing array of environmental and anthropogenic impacts. Coral disease is one of the prominent causes of increased mortality among reefs globally, particularly in the Caribbean. Although over 40 different coral diseases and syndromes have been reported worldwide, only a few etiological agents have been confirmed;AuthorsS. B. Galloway, Cheryl M. Woodley, S. M. McLaughlin, Thierry M. Work, V. S. Bochsler, Carol U. Meteyer, Louis Sileo, E. C. Peters, E. Kramarsky-Winters, J. Frank Morado, P. G. Parnell, D. S. Rotstein, R. A. Harely, T. L. ReynoldsEvaluating 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. RameyerMortality in the endangered Laysan teal, Anas laysanensis: conservation implications
The Laysan Teal Anas laysanensis is an endangered anatid of the Hawaiian Islands, currently restricted to an emergent atoll, Laysan Island. Laysan Island lacks terrestrial mammalian predators, which permits the examination of mortality rates and causes without the anthropogenic effects of introduced predators. Mass and morophometrics were measured during the colour-marking of 297 Laysan Teal betweAuthorsM.H. Reynolds, Thierry M. WorkEpizootiology 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 MarieGeographic variation in marine turtle fibropapillomatosis
We document three examples of fibropapillomatosis by histology, quantitative polymerase chain reaction (qPCR), and sequence analysis from three different geographic areas. Tumors compatible in morphology with fibropapillomatosis were seen in green turtles from Puerto Rico and San Diego (California) and in a hybrid loggerhead/ hawksbill turtle from Florida Bay (Florida). Tumors were confirmed as fiAuthorsR.J. Greenblatt, Thierry M. Work, P. Dutton, C.A. Sutton, T.R. Spraker, R.N. Casey, C.E. Diez, Dana C. Parker, J. St. Ledger, G.H. Balazs, J.W. CaseyWildlife health and disease investigations
Wildlife population management requires knowledge of factors that affect population sustainability. Mortality is one of the most important of those factors. Without a clear understanding of the causes of mortality, decisions by managers of whether or how to intercede may be inappropriate. Wildlife biologists are usually the first to discover, assess, and respond to wildlife mortality. Biologists wAuthorsT.J. Roffe, Thierry M. WorkCharacterizing lesions in corals from 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. RameyerNon-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