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Publications

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

Filter Total Items: 1616

Guidelines for proper care and use of wildlife in field research

No abstract available.
Authors
Milton Friend, D. E. Toweill, Robert L. Brownell, V. F. Nettles, Donald Davis, William J. Foreyt

Horvitz-Thompson survey sample methods for estimating large-scale animal abundance

Large-scale surveys to estimate animal abundance can be useful for monitoring population status and trends, for measuring responses to management or environmental alterations, and for testing ecological hypotheses about abundance. However, large-scale surveys may be expensive and logistically complex. To ensure resources are not wasted on unattainable targets, the goals and uses of each survey sho
Authors
M. D. Samuel, E.O. Garton

American woodcock (Scolopax minor) mortality associated with a reovirus

A virus isolate associated with a 1989-90 die-off in American woodcock (Scolopax minor) was identified as a reovirus. Emaciation was a consistent necropsy finding in the woodcock involved in this die-off. This reovirus infection appeared to be systemic, had the potential for fecal-oral virus transmission, and was associated with deterioration of body condition. To our knowledge this is the first r
Authors
D. E. Docherty, K. A. Converse, W. R. Hansen, G.W. Norman

Parathion poisoning of Mississippi kites in Oklahoma

Parathion(phosphorothioic acid O, O-diethyl O-[4-nitrophenyl] ester) is a broad spectrum organophosphorus insecticide, used on a variety of crops and occasionally for mosquito control, and is highly toxic to birds (Smith 1987). Intentional poisoning with parathion is reported to have killed more than 8000 red-winged blackbirds (Agelaius phoeniceus), common grackles (Quiscalus quiscula), brown-head
Authors
J. Christian Franson

Avian leucocyte counting using the hemocytometer

Automated methods for counting leucocytes in avian blood are not available because of the presence of nucleated erythrocytes and thrombocytes. Therefore, total white blood cell counts are performed by hand using a hemocytometer. The Natt and Herrick and the Unopette methods are the most common stain and diluent preparations for this procedure. Replicate hemocytometer counts using these two methods
Authors
F. J. Dein, A. Wilson, D. Fischer, P. Langenberg

Use of sentinel mallards for epizootiologic studies of avian botulism

Captive-reared mallards (Anas platyrhynchos) were used as sentinels to study the epizootiology of avian botulism at the Sacramento National Wildlife Refuge, Willows, California (USA) from 1986 to 1989. Sentinel mallards were wing-clipped, and 40 to 50 birds were confined in 1.6-ha enclosures in 11 selected wetlands (pools). Enclosures were searched intensively three to four times weekly from July
Authors
T.E. Rocke, C. J. Brand

Erysipelothrix rhusiopathiae infection in a captive bald eagle (Haliaeetus leucocephalus)

An adult bald eagle (Haliaeetus leucocephalus) kept in captivity for nearly 7 yr at the Patuxent Wildlife Research Center, Laurel, Maryland, died suddenly with gross and microscopic lesions characteristic of septicemia. Erysipelothrix rhusiopathiae was isolated from the liver. Fish comprised part of the bird's diet and may have been the source of the organism.
Authors
J. Christian Franson, Elizabeth J. Galbreath, Stanley N. Wiemeyer, John M. Abell

Prevalence of eustrongylidosis in wading birds from colonies in California, Texas, and Rhode Island, USA

Snowy Egret (Egretta thula) and Black-crowned Night-Heron (Nycticorax nycticorax) nestlings from colonies in Texas, Rhode Island, and California and Great Egret (Casmerodius albus) nestlings from Texas were examined for eustrongylidosis, or infection by the parasitic nematode Eustrongylides spp. In 31% (24/77) of all broods examined, at least one nestling was infected. Snowy Egret broods from Texa
Authors
J. C. Franson, T. W. Custer