ABSTRACT
We report an outbreak of abortion due to equine herpesvirus (EHV) in 5 mares between 9 and 11 months of gestation, from a herd of 22 Thoroughbred mares. Equine herpesvirus was isolated from extracts of the liver, spleen and thymus but not from the lungs of a 9-month fetus grown in Rabbit Kidney (RK13) cells. The virus was identified by electron microscopy, where virus particles could be seen in the nucleus of infected cells, and by the fluorescent antibody technique with polyclonal antibodies against the whole virus. Anamnesis, necropsy, histopathology, bacteriology, and virology data suggest that the abortions reported in this paper were due to equine herpesvirus.
Subject(s)
Animals , Female , Pregnancy , Abortion, Veterinary , Horse Diseases/virology , Herpesvirus 1, Equid , Herpesviridae Infections/veterinary , Abortion, Veterinary , Antibodies, Viral , Spleen/pathology , Spleen/virology , Brazil , Horse Diseases/epidemiology , Fetus , Liver/pathology , Liver/virology , Herpesvirus 1, Equid , Horses , Herpesviridae Infections/epidemiology , Herpesviridae Infections/prevention & control , Herpesviridae Infections/virology , Microscopy, Electron , Thymus GlandABSTRACT
Um estudo soro-epidemiológico da infecçäo pelo vírus da leucose boivna (VLB) foi realizado com amostras de soro de 1.038 vacas de 135 propriedades leiteira em 18 municípios da regiäo central do estado do Rio Grande do Sul,. Foram identificadas 215 (20,71%) amostras positivas em 59 (43,7%) propriedades. Os níveis de positividade variaram de zero a 89,2% do rebanho adulto. Em 20 propriedades positivas foi realizada uma segunda coleta de soro aproximadamente 80 dias após a primeira. Trinta e dois (6,9%) animais soroconverteram e o índice de positividade aumentou de 27,2% para 34,7%.