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J Wildl Dis: Multi-species patterns of avian cholera
mortality in Nebraska's rainwater basin.
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| Article Type: | Reprint |
| Subject: |
Disease transmission
(Methods) Chicken cholera (Research) Waterfowl (Diseases) Bird populations |
| Authors: |
Blanchong, J.A. Samuel, M.D. Mack, G. |
| Pub Date: | 09/01/2006 |
| Publication: | Name: Journal of Avian Medicine and Surgery Publisher: Association of Avian Veterinarians Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2006 Association of Avian Veterinarians ISSN: 1082-6742 |
| Issue: | Date: Sept, 2006 Source Volume: 20 Source Issue: 3 |
| Topic: | Event Code: 310 Science & research |
| Geographic: | Geographic Scope: United States Geographic Code: 1USA United States |
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| Accession Number: | 167430716 |
| Full Text: |
Nebraska's Rainwater Basin (RWB) is a key spring migration
area for millions of waterfowl and other avian species. Avian cholera
has been endemic in the RWB since the 1970s and in some years tens of
thousands of waterfowl have died from the disease. We evaluated patterns
of avian cholera mortality in waterfowl species using the RWB during the
last quarter of the 20th century. Mortality patterns changed between the
years before (1976-1988) and coincident with (1989-1999) the dramatic
increases in lesser snow goose abundance and mortality. Lesser snow
geese (Chen caerulescens caerulescens) have commonly been associated
with mortality events in the RWB and are known to carry virulent strains
of Pasteurella multocida, the agent causing avian cholera. Lesser snow
geese appeared to be the species most affected by avian cholera during
1989-1999; however, mortality in several other waterfowl species was
positively correlated with lesser snow goose mortality. Coincident with
increased lesser snow goose mortality, spring avian cholera outbreaks
were detected earlier and ended earlier compared to 1976-1988. Dense
concentrations of lesser snow geese may facilitate intraspecific disease
transmission through bird-to-bird contact and wetland contamination.
Rates of interspecific avian cholera transmission within the waterfowl
community, however, are difficult to determine. 2006;42:81-91. |
| Gale Copyright: | Copyright 2006 Gale, Cengage Learning. All rights reserved. |