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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: 1651

Duck viral enteritis in domestic muscovy ducks in Pennsylvania Duck viral enteritis in domestic muscovy ducks in Pennsylvania

Duck viral enteritis (DVE) outbreaks occurred at two different locations in Pennsylvania in 1991 and 1992. In the first outbreak, four ducks died out of a group of 30 domestic ducks; in the second outbreak, 65 ducks died out of a group of 114 domestic ducks, and 15 domestic geese died as well. A variety of species of ducks were present on both premises, but only muscovy ducks (Cairina...
Authors
S. Davison, K. A. Converse, A.N. Hamir, R.J. Eckroade

Seasonal prevalence of Clostridium botulinum type C in the sediments of the northern California wetland Seasonal prevalence of Clostridium botulinum type C in the sediments of the northern California wetland

The prevalence of Clostridium botulinum type C (% of positive sediment samples) was determined in 10 marshes at Sacramento National Wildlife Refuge (SNWR), located in the Central Valley of California (USA), where avian botulism epizootics occur regularly. Fifty-two percent of 2,200 sediment samples collected over an 18-mo period contained C. botulinum type C (both neurotoxic and...
Authors
Renee J. Sandler, Tonie E. Rocke, M.D. Samuel, Thomas M. Yuill

Diagnostic riddles Diagnostic riddles

A bridled white-eye (Zosterops conspicillata) was captured in a mist net on the island of Saipan and transported to the island of Guam for an experimental study. Beginning on day three, it was immunosuppressed by intramuscular injections of dexamethasone. It was unexpectedly found dead on day 20, at which time it had lost 0.9 g (12.9% of initial body weight). Gross Pathology: Despite the...
Authors
L. Sileo, E.C. Greiner

Perinatal mortality in caribou from the Porcupine herd, Alaska Perinatal mortality in caribou from the Porcupine herd, Alaska

During the 1989 caribou (Rangifer tarandus) calving season on the Arctic National Wildlife Refuge, Alaska (USA), 61 calf carcasses were examined for cause of death and associated pathology. Dead calves were located by low-level aerial searches with two fixed-wing aircraft and a helicopter over high density calving areas between the Hulahula and Aichilik rivers. Primary diagnoses included
Authors
T.J. Roffe

Clostridium botulinum Clostridium botulinum

No abstract available.
Authors
Tonie E. Rocke

Vitamin E in cranes: Reference ranges and nutrient interactions Vitamin E in cranes: Reference ranges and nutrient interactions

Fat soluble vitamins E and A (quantified as α-tocopherol and all-trans retinol, respectively) were measured in plasma samples from 274 captive cranes from four institutions and five free-ranging birds. Ages ranged from 4 mo to 80 yr, and all 15 crane species were represented. Captive cranes had a mean ± standard error (SE) of 6.57 ± 0.82 μg/ml α-tocopherol; migrating greater sandhill...
Authors
Ellen S. Dierenfeld, C.D. Sheppard, J. Langenberg, C. Mirande, J. Spratt, F. J. Dein

Cryopreservation of American kestrel semen with dimethylsulfoxide Cryopreservation of American kestrel semen with dimethylsulfoxide

Semen samples from 15 male American Kestrels (Falco sparverius) were frozen in dimethyl sulfoxide (DMSO). The semen was thawed 1-14 mo later and used to inseminate six females during three breeding seasons. Kestrels inseminated with thawed semen containing 4% DMSO produced only infertile eggs (N = 14). Kestrels inseminated with thawed semen containing 6%, 8%, or 10% DMSO produced fertile...
Authors
G.F. Gee, C.A. Morrell, J. Christian Franson, Oliver H. Pattee

Estimation of wildlife population ratios incorporating survey design and visibility bias Estimation of wildlife population ratios incorporating survey design and visibility bias

Age and sex ratio statistics are often a key component of the evaluation and management of wildlife populations. These statistics are determined from counts of animals that are commonly plagued by errors associated with either survey design or visibility bias. We present age and sex ratio estimators that incorporate both these sources of error and include the typical situation that...
Authors
Michael D. Samuel, R. Kirk Steinhorst, Edward O. Garton, James W. Unsworth
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