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vector competence of culicoides species and the seroprevalence of homologous neutralizing antibody in horses for six serotypes of equine encephalosis virus (eev) in south africa.field-collected culicoides species (diptera: ceratopogonidae) were fed on horse blood-virus mixtures containing one of the six serotypes of equine encephalosis virus (eev1 to eev6). the virus mean titres in the bloodmeals varied between 6.1 and 7.0 log10tcid50/ml. of 19 culicoides species assayed after 10 days extrinsic incubation at 23.5 degrees c, five yielded the challenge virus, namely culicoides (avaritia) imicola kieffer (eev1-6), c. (a.) bolitinos meiswinkel (eev1, 2, 4, 6), c. (meijerehe ...200415642007
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