ASPECTOS ETIOLÓGICOS E EPIDEMIOLÓGICOS DO ABORTO EQÜINO

Para a investigacao das causas de aborto equino na regiao de Curitiba, realizou-se a coleta e processamento do material de casos de aborto para bacteriologia, virologia e histologia; e um levantamento estatistico geral dos casos de aborto. Durante tres anos, foram acompanhadas 674 gestacoes, das quais 9,2% resultaram em aborto. Com relacao a abortos gemelares, verificou-se um indice de 4,5% em um total de 132 casos analisados. O material de 21 fetos foi processado com o intuito de isolar-se o Herpesvirus equino tipo 1, obtendo-se o isolamento em 4 casos (19,0%). Foram examinados para bacteriologia um total de 38 fetos, dos quais 44,7% foram considerados bacteriologicamente positivos. As bacterias isoladas com maior frequencia foram: Streptococcus spp., Klebsiella spp., Escherichia coli, Pseudomonas spp. e Staphylococcus spp.. Foram descritas as alteracoes encontradas no exame histologico da maioria dos casos de aborto de origem bacteriana e viral. Abstract This research was undertaken with the aim of establishing the main causes of equine abortion in the Curitiba area. It has been established that during the period of three years occurred a total of 9.2 per cent abortions among 674 gestations studied. From 50 aborted fetuses, different biological material was collected for bacteriology, virus and histopathology analysis. A total of 4.5 per cent of twin abortions were observed among 132 cases of abortions studied. The equine Herpesvirus type 1 has been successfully isolated from 4 cases, among 21 fetuses studied. On the other hand, 44.7 per cent from 38 fetuses studied were considered positive for bacteriological testing. The most frequent bacteria recovered were Streptococcus spp., Klebsiella spp., Escherichia coli, Pseudomonas spp. and Staphylococcus spp. The alterations found in the histological examination of the majority of bacteriological and virological abortion cases were desccribed.