Title:  Serotype distribution of bluetongue and epizootic hemorrhagic disease viruses in Georgia.
Author(s): Stallknecht, D. E., V. F. Nettles, W. R Davidson, and E. W. Howerth.
Year: 1992
Abstract: Bluetongue virus (BTV) and epizootic hemorrhagic disease virus (EHDV) are recognized as the two most important viral pathogens of white-tailed deer (Odocoileus virninianus). Five serotypes of BTV (BTV-2, 10,11, 13, and 17) and two serotypes of EHDV (EHDV-1 and 2) are present in the United States. The distribution and persistence of these individual serotypes in deer populations, however, are unknown. As immunity in previously infected animals is serotype specific, information on BTV and EHDV serotype distribution may help to explain both spacial and temporal patterns of periodic hemorrhagic disease in deer. White-tailed deer serum samples collected kom hunter-killed deer in Georgia during 1989 and 1990 were tested by senun neutralization tests against all United States serotypes of BTV and EHDV. Monospecific reactions, indicative of exposure to a specific serotype, were restricted to BTV-13, and EHDV-2. Exposure to BTV-13 was restricted to the Coastal Plain and lower Piedmont, while evidence of EHDV-2 exposure occurred state-wide. In a retrospective survey of serum samples collected from 1967 to 1988 from white-tailed deer in Georgia, serum neutralization results indicated that EHDV-1, EHDV -2, BTV-1 1, BTV-13, and BTV-17 have been present. Some of these serotypes have shifted dramatically (BTV-17 and EHDV-I), while others have persisted (BTV-13 and EHDV-2)

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