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An adenovirus linked to mortality and disease in long-tailed ducks (Clangula hyemalis) in Alaska

Avian Diseases

By:
, , , , , , and
DOI: 10.1637/7029

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Abstract

An adenovirus was isolated from intestinal samples of two long-tailed ducks (Clangula hyemalis) collected during a die-off in the Beaufort Sea off the north coast of Alaska in 2000. The virus was not neutralized by reference antiserum against known group I, II, or III avian adenoviruses and may represent a new serotype. The prevalence of the virus was determined in live-trapped long-tailed ducks at the mortality site and at a reference site 100 km away where no mortality was observed. Prevalence of adenovirus antibodies in serum samples at the mortality site was 86% compared to 10% at the reference site. Furthermore, 50% of cloacal swabs collected at the mortality site and only 7% of swabs from the reference site were positive for adenoviruses. In 2001, no mortality was observed at either of the study areas, and virus prevalence in both serum and cloacal samples was low, providing further evidence that the adenovirus was linked to the mortality event in 2000. The virus was used to infect long-tailed ducks under experimental conditions and resulted in lesions previously described for avian adenovirus infections and similar to those observed in long-tailed duck carcasses from the Beaufort Sea. The status of long-tailed ducks has recently become a concern in Alaska due to precipitous declines in breeding populations there since the mid-1970s. Our findings suggest that the newly isolated adenovirus is a disease agent and source of mortality in long-tailed ducks, and thus could be a contributing factor in population declines.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
An adenovirus linked to mortality and disease in long-tailed ducks (Clangula hyemalis) in Alaska
Series title:
Avian Diseases
DOI:
10.1637/7029
Volume
47
Issue:
4
Year Published:
2003
Language:
English
Publisher:
American Association of Avian Pathologists
Publisher location:
Jacksonville, FL
Contributing office(s):
National Wildlife Health Center
Description:
7 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Avian Diseases
First page:
1434
Last page:
1440