Doenças parasitárias em bovinos e ovinos no sul do Brasil: Frequência e estimativa de perdas econômicas

Abstract

A survey of parasitic diseases of cattle and sheep diagnosed in Southern Brazil, from January 1978 to December 2014, was conducted in the Laboratório Regional de Diagnóstico, of Universidade Federal de Pelotas. In cattle 10.1% of all cases diagnosed were parasitic diseases, of which the most common was tick fever with 55.1% of cases. Mixed gastrintestinal parasitosis was diagnosed in 22.35% of cases, hemonchosis in 4.36%, dyctiocaulosis in 3.52%, fluke infection in 2.68%, and eimeriosis in 1.84% of the cases. In sheep 33.6% of the diagnoses was parasitosis. In sheep mixed gastrintestinal parasitosis was the most frequent with 42.7% of the cases, hemonchosis was observed in 35.4%, coenurosis in 9.1% and fluke infection in 4.4% of the cases. It is estimated that losses through mortality resulting from parasitic diseases in cattle is approximately R$16.968.000/year. In sheep the economic losses through mortality caused by parasites is about R$2.016.000/year. The results of this survey realize the importance of parasitic diseases in ruminants in Southern Brazil, based on data from more than three decades of diagnostic. It was concluded that, in cattle in southern Rio Grande do Sul, the TPB agents are the main cause of economic losses, followed by mixed parasitic infections. In sheep mixed gastrointestinal parasitosis and hemoncose together represent more than 70% of the diagnoses performed.