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Desert bighorn sheep mortality due to presumptive type C botulism in California

Journal of Wildlife Diseases

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Abstract

During a routine telemetry flight of the Mojave Desert (California, USA) in August 1995, mortality signals were detected from two of 12 radio-collared female desert bighorn sheep (Ovis canadensis) in the vicinity of Old Dad Peak in San Bernardino County (California). A series of field investigations determined that at least 45 bighorn sheep had died near two artificial water catchments (guzzlers), including 13 bighorn sheep which had presumably drowned in a guzzler tank. Samples from water contaminated by decomposing bighorn sheep carcasses and hemolyzed blood from a fresh bighorn sheep carcass were tested for the presence of pesticides, heavy metals, strychnine, blue-green algae, Clostridium botulinum toxin, ethylene glycol, nitrates, nitrites, sodium, and salts. Mouse bioassay and enzyme-linked immunosorbent assay detected type C botulinum toxin in the hemolyzed blood and in fly larvae and pupae. This, coupled with negative results from other analyses, led us to conclude that type C botulinum poisoning was most likely responsible for the mortality of bighorn sheep outside the guzzler tank.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Desert bighorn sheep mortality due to presumptive type C botulism in California
Series title:
Journal of Wildlife Diseases
Volume
36
Issue:
1
Year Published:
2000
Language:
English
Contributing office(s):
National Wildlife Health Center
Description:
p. 184-189
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Wildlife Diseases
First page:
184
Last page:
189
Country:
United States
State:
California
Online Only (Y/N):
N
Additional Online Files(Y/N):
N