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View citations of publications by National Wildlife Health Center scientists since our founding in 1975. Access to full-text is provided where possible.

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Wildlife Disease Case Definitions

Case definitions provide a standardized, science-based set of criteria for diagnosing disease and pathogens. This manual provides case definitions for selected diseases of importance to wildlife in Canada and the United States.

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January 1, 2003

A bug besetting birds, horses, and humans alike: The West Nile virus will likely be here for a long time. How large a threat does it pose? A bug besetting birds, horses, and humans alike: The West Nile virus will likely be here for a long time. How large a threat does it pose?

No abstract available.

Authors

S.W. Matteson, E. Saito

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Vacuolar myelinopathy in waterfowl from a North Carolina impoundment Vacuolar myelinopathy in waterfowl from a North Carolina impoundment

Vacuolar myelinopathy was confirmed by light and electron microscopic examination of mallards (Anas platyrhynchos), ring-necked ducks (Aythya collaris), and buffleheads (Bucephala albeola) collected during an epizootic at Lake Surf in central North Carolina (USA) between November 1998 and February 1999. Clinical signs of affected birds were consistent with central nervous system...

Authors

T. Augspurger, John R. Fischer, Nancy Thomas, L. Sileo, Roger E. Brannian, Kimberli J.G. Miller, Tonie E. Rocke

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Human-induced contaminant impacts on migratory birds: Lessons from the North American eared grebe (Podiceps nigricollis) Human-induced contaminant impacts on migratory birds: Lessons from the North American eared grebe (Podiceps nigricollis)

The effects of aquatic contaminants generated by soda ash mining processes on the North American eared grebe (Podiceps nigricollis) population illustrates important issues associated with human-induced habitat degradation on the health of migratory species. Eared grebes have been extensively studied in their staging and breeding habitats, but little is known about their 2- to 3-day...

Authors

Kurt K. Sladky, Charlotte Quist, Pedro Ramirez, David Hill, F. Joshua Dein

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Recombinant raccoon pox vaccine protects mice against lethal plague Recombinant raccoon pox vaccine protects mice against lethal plague

Using a raccoon poxvirus (RCN) expression system, we have developed new recombinant vaccines that can protect mice against lethal plague infection. We tested the effects of a translation enhancer (EMCV-IRES) in combination with a secretory (tPA) signal or secretory (tPA) and membrane anchoring (CHV-gG) signals on in vitro antigen expression of F1 antigen in tissue culture and the...

Authors

J.E. Osorio, T.D. Powell, R.S. Frank, K. Moss, E.J. Haanes, S.R. Smith, Tonie E. Rocke, D.T. Stinchcomb

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Influence of Ribeiroia ondatrae (Trematoda: Digenea) infection on limb development and survival of northern leopard frogs (Rana pipiens): effects of host stage and parasite-exposure level Influence of Ribeiroia ondatrae (Trematoda: Digenea) infection on limb development and survival of northern leopard frogs (Rana pipiens): effects of host stage and parasite-exposure level

Recent evidence suggests that infection by larvae of the trematode Ribeiroia ondatrae accounts for a significant proportion of limb malformations currently observed in amphibian populations of North America. However, the effects of R. ondatrae infection on northern leopard frogs (Rana pipiens), one of the species most frequently reported with malformations, have not been adequately...

Authors

Anna M. Schotthoefer, Anson V. Koehler, Carol U. Meteyer, Rebecca A. Cole

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Sarcocysts of an unidentified species of Sarcocystis in the sea otter (Enhydra lutris) Sarcocysts of an unidentified species of Sarcocystis in the sea otter (Enhydra lutris)

The number of Sarcocystis species that infect sea otters (Enhydra lutris) is unknown. Sea otter tissues were recently shown to harbor sarcocysts of S. neurona and of unidentified species of Sarcocystis. Whereas sarcocysts of S. neurona have walls 1–3 μm thick with type 9 villar protrusions, ultrastructure of a distinct thin-walled sarcocyst (0.5–0.7 μm thick) lacking villar protrusions...

Authors

J. P. Dubey, D. S. Lindsay, B.M. Rosenthal, N. J. Thomas

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Salton Sea Salton Sea

No abstract available.

Authors

Milton Friend

Ecosystems Mission Area, National Wildlife Health Center, Salton Sea

January 1, 2003

National Wildlife Health Center's Quarterly Mortality Report National Wildlife Health Center's Quarterly Mortality Report

No abstract available.

Authors

K. A. Converse, R. Sohn, Kimberli J.G. Miller, G. McLaughlin, C. Lemanski

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Detection of West Nile virus infection in birds in the United States by blocking ELISA and immunohistochemistry Detection of West Nile virus infection in birds in the United States by blocking ELISA and immunohistochemistry

A blocking ELISA targeting an immunodominant West Nile epitope on the West Nile Virus NS1 protein was assessed for the detection of West Nile–specific antibodies in blood samples collected from 584 sentinel chickens and 238 wild birds collected in New Jersey from May–December 2000. Ten mallard ducks (Anas platyrhynchos) experimentally infected with West Nile virus and six uninfected...

Authors

M. Jozan, R. Evans, R. McLean, R. Hall, B. Tangredi, L. Reed, J. Scott

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Pseudacris triseriata (western chorus frog) and Rana sylvatica (wood frog) chytridiomycosis Pseudacris triseriata (western chorus frog) and Rana sylvatica (wood frog) chytridiomycosis

The chytrid fungus Batrachochytrium dendrobatidis is a known pathogen of anuran amphibians, and has been correlated with amphibian die-offs worldwide (Daszak et. al. 1999. Emerging Infectious Diseases 5:735-748). In Colorado, B. dendrobatidis has infected Boreal toads (Bufo boreas) (Muths et. al., in review) and has been identified on museum specimens of northern leopard frogs (Rana...

Authors

S.E. Rittman, E. Muths, D. E. Green

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Chronic wasting disease in free-ranging Wisconsin white-tailed deer Chronic wasting disease in free-ranging Wisconsin white-tailed deer

Three White-tailed Deer shot within 5 km during the 2001 hunting season in Wisconsin tested positive for chronic wasting disease, a prion disease of cervids. Subsequent sampling within 18 km showed a 3% prevalence (n=476). This discovery represents an important range extension for chronic wasting disease into the eastern United States.

Authors

D.O. Joly, C. A. Ribic, J.A. Langenberg, K. Beheler, C.A. Batha, B.J. Dhuey, R.E. Rolley, G. Bartelt, T.R. VanDeelen, M.D. Samuel

Ecosystems Mission Area, National Wildlife Health Center

January 1, 2003

Toxoplasma gondii, Neospora caninum, Sarcocystis neurona, and Sarcocystis canis-like infections in marine mammals Toxoplasma gondii, Neospora caninum, Sarcocystis neurona, and Sarcocystis canis-like infections in marine mammals

Toxoplasma gondii, Neospora caninum, Sarcocystis neurona, and S. canis are related protozoans that can cause mortality in many species of domestic and wild animals. Recently, T. gondii and S. neurona were recognized to cause encephalitis in marine mammals. As yet, there is no report of natural exposure of N. caninum in marine mammals. In the present study, antibodies to T. gondii and N...

Authors

J. P. Dubey, R. Zarnke, N. J. Thomas, S.K. Wong, W. Vanbonn, M. Briggs, J.W. Davis, R. Ewing, M. Mense, O. C. H. Kwok, S. Romand, P. Thulliez

Ecosystems Mission Area, National Wildlife Health Center