A cross-sectional study of risk factors affecting the outcome of rabbit haemorrhagic disease virus releases in New South Wales
| Autor: | Lugton Iw |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
medicine.medical_specialty
Veterinary medicine Cross-sectional study Hemorrhagic Disease Virus Rabbit Population Ectoparasitic Infestations Biology Disease Outbreaks Rabbit haemorrhagic disease Risk Factors Surveys and Questionnaires Epidemiology medicine Animals Risk factor education Caliciviridae Infections Retrospective Studies education.field_of_study General Veterinary Transmission (medicine) Outbreak General Medicine Odds ratio biology.organism_classification Insect Vectors Cross-Sectional Studies Logistic Models Siphonaptera Cattle Rabbits New South Wales |
| Zdroj: | Australian veterinary journal. 77(5) |
| ISSN: | 0005-0423 |
| Popis: | ObjectiveTo determine what factors governed the extent of outbreaks of rabbit haemorrhagic disease (RHD) following releases in New South Wales. DesignRetrospective cross-sectional study. ProcedureInformation from the data set of offici al releases was subjected to two preliminary analyses. More comprehensive information on a subsample of official RHD releases, sites and animals was gathered by telephone survey of Rural Lands Protection Board staff and farmers. Data were analysed using multivariate techniques to determine which factors were associated with rabbit mortality within one month of RHDV release, within several months of release and in affecting the proportion of the population killed. ResultsAstrong association was found between the presence of heavy flea infestation (odds ratio 2.7), breeding in rabbits and outbreaks of RHD. For each week following breeding there was an 8% decline in the odds of an outbreak. Low temperatures also promoted outbreaks. Less important effects included the prior presence of RHD at the release site, which reduced the likelihood and severity of outbreaks. The presence of cattle and proximity to the nearest water body were associated with increased severity and likelihood of outbreaks respectively. ConclusionBoth breeding of rabbits and associated high flea numbers may act together or independently in promoting outbreaks of RHD. Stresses involved with rabbit reproduction and low environmental temperatures also appear to influence the likelihood of outbreaks. The effects of proximity to cattle and water suggests that both flies and mosquitoes may have a minor role in local transmission. |
| Databáze: | OpenAIRE |
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