No abstract available
MeSH terms
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Animals
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Birds*
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Disease Reservoirs*
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Encephalitis Viruses / isolation & purification*
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Encephalomyelitis, Equine / epidemiology*
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Encephalomyelitis, Equine / immunology
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Hemagglutination Inhibition Tests
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Horse Diseases / epidemiology*
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Horse Diseases / immunology
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Horses
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South America
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United States