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Pathogen exposure and blood chemistry in the Washington population of northern sea otters (Enhydra lutris kenyoni)

Journal of Wildlife Diseases

By:
, , , , , , , and
DOI: 10.7589/2013-03-053

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Abstract

Northern sea otters (Enhydra lutris kenyoni) from Washington State, United States were evaluated in 2011 to determine health status and pathogen exposure. Antibodies to Brucella spp. (10%) and influenza A virus (23%) were detected for the first time in this population in 2011. Changes in clinical pathology values (serum chemistries), exposure to pathogens, and overall health of the population over the last decade were assessed by comparing 2011 data to the data collected on this population in 2001–2002. Several serum chemistry parameters were different between study years and sexes but were not clinically significant. The odds of canine distemper virus exposure were higher for otters sampled in 2001–2002 (80%) compared to 2011 (10%); likelihood of exposure significantly increased with age. Prevalence of exposure to Sarcocystis neurona was also higher in 2001–2002 (29%) than in 2011 (0%), but because testing methods varied between study years the results were not directly comparable. Exposure to Leptospira spp. was only observed in 2001–2002. Odds of Toxoplasma gondii exposure were higher for otters sampled in 2011 (97%) than otters in 2001–2002 (58%). Substantial levels of domoic acid (n = 2) and saxitoxin (n = 2) were found in urine or fecal samples from animals sampled in 2011. No evidence of calicivirus or Coxiella burnetii exposure in the Washington population of northern sea otters was found in either 2001–2002 or 2011. Changes in exposure status from 2001–2002 to 2011 suggest that the Washington sea otter population may be dealing with new disease threats (e.g., influenza) while also increasing their susceptibility to diseases that may be highly pathogenic in naïve individuals (e.g., canine distemper).

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Pathogen exposure and blood chemistry in the Washington population of northern sea otters (Enhydra lutris kenyoni)
Series title:
Journal of Wildlife Diseases
DOI:
10.7589/2013-03-053
Volume
49
Issue:
4
Year Published:
2013
Language:
English
Publisher:
Wildlife Disease Association
Contributing office(s):
National Wildlife Health Center
Description:
13 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Wildlife Diseases
First page:
867
Last page:
899
Country:
United States
State:
Washington
Online Only (Y/N):
N
Additional Online Files(Y/N):
N