Abstract
There have been substantial recent changes in the global distribution and nature of bluetongue virus (BTV) infection of ungulates, perhaps as a result of climate change. To evaluate the epidemiology of BTV infection in California, an area historically endemic for the virus, we monitored newborn dairy calves at different sites for 1 year for the presence of BTV RNA and virus-specific antibodies. The data confirm both localized, vector-mediated, seasonal transmission of BTV as well as dissemination of BTV and/or viral nucleic acid to newborn calves following ingestion of colostrum.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Animals
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Animals, Newborn
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Antibodies, Viral / blood
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Antibodies, Viral / immunology
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Bluetongue / epidemiology*
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Bluetongue / prevention & control
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Bluetongue / transmission*
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Bluetongue virus / genetics
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Bluetongue virus / immunology*
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California / epidemiology
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Cattle
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Colostrum* / virology
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Dairying
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Female
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Infectious Disease Transmission, Vertical
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Pregnancy
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Prevalence
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RNA, Viral / isolation & purification*
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Time Factors
Substances
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Antibodies, Viral
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RNA, Viral