Infecção pelo vírus da maedi - visna, leptospira spp, Georreferenciamento de focos e perfil zootécnico de rebanhos ovinos nas regionais de Chapadinha e Itapecuru -Mirim, Maranhão, Brasil

Abstract

The sheep breeding is a nationwide exploited activity, being practiced mostly by low income breeders and and have little or no knowledge about it. This study aimed to determine the frequency of these diseases, determine the breeding profile and georeference of outbreaks. For diagnostic of Maedi - Visna, was used the Agar Gel Immunodiffusion test in 1150 samples distributed in regional of Chapadinha and Itapecuru - Mirim. In the diagnostic of leptospirosis was used the Microscopic Agglutination Test in 575 samples of these same herds. Were applied a questionnaires to determine risk factors and the breeding profile and georeferencing of outbreaks. The results showed a frequency of 0,18% (1/550) positive animals for anti – bodies anti - MV in regional of Itapecuru - Mirim and the frequency of herds was 1,81% (1/55). The frequency in regional of Chapadinha was 0%. In relation to leptospirosis, there was obtained a frequency of 87% (261/300) in regional of Chapadinha and 71,6% (197/275) in Itapecuru - Mirim. In both cases, the frequency of outbreaks herds was 100%. It can be concluded the low and high frequencies for MV and Leptospira spp, respectively, both regional studied. The breeding profile revealed a predominance of creators with declining age, with empirical knowledge and using extensive system.