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Associations between water quality, Pasteurella multocida, and avian cholera at Sacramento National Wildlife Refuge

Journal of Wildlife Diseases

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Abstract

We studied patterns in avian cholera mortality, the presence of Pasteurella multocida in the water or sediment, and water chemistry characteristics in 10 wetlands at the Sacramento National Wildlife Refuge Complex (California, USA), an area of recurrent avian cholera epizootics, during the winters of 1997 and 1998. Avian cholera outbreaks (a?Y50 dead birds) occurred on two wetlands during the winter of 1997, but no P. multocida were recovered from 390 water and 390 sediment samples from any of the 10 wetlands. No mortality events were observed on study wetlands during the winter of 1998; however, P. multocida was recovered from water and sediment samples in six of the 10 study wetlands. The pH levels were higher for wetlands experiencing outbreaks during the winter of 1997 than for nonoutbreak wetlands, and aluminum concentrations were higher in wetlands from which P. multocida were recovered during the winter of 1998. Water chemistry parameters (calcium, magnesium, sodium, and dissolved protein) previously linked with P. multocida and avian cholera mortality were not associated with the occurrence of avian cholera outbreaks or the presence of P. multocida in our study wetlands. Overall, we found no evidence to support the hypothesis that wetland characteristics facilitate the presence of P. multocida and, thereby, allow some wetlands to serve as long-term sources (reservoirs) for P. multocida.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Associations between water quality, Pasteurella multocida, and avian cholera at Sacramento National Wildlife Refuge
Series title:
Journal of Wildlife Diseases
Volume
41
Issue:
2
Year Published:
2005
Language:
English
Contributing office(s):
National Wildlife Health Center
Description:
p. 291-297
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Wildlife Diseases
First page:
291
Last page:
297
Online Only (Y/N):
N
Additional Online Files(Y/N):
N