Prevalência de anticorpos anti-leptospira SPP. e fatores associados a soropositividade de bovinos de sete propriedades rurais do município de Dom Pedrito - RS

Abstract

Leptospirosis is a zoonotic disease that is extremely important in cattle herds because it affects the reproductive efficiency, causing low productivity rates, losses and lost quality of life of animals. In this way, he became interested in conducting a serological survey in beef cattle in the region, in order to determine the frequency and prevalence of seropositive herds to Leptospira spp. farms in the municipality of Dom Pedrito, Rio Grande do Sul. The survey was conducted in seven farms in different locations in that city. The samples were tested by the microscopic agglutination test method (SAM) to detect anti-Leptospira spp. antibodies, he used the living antigens: L. bratislava, L. butembo, L. canicola, L. grippothyphosa, L. copenhageni, L. icterohaemorrhagiae, L. pomona, L. hardjoprajitno, hardjobovis L. and L. wolffi. From the serological testing were found 58.44% (45/77) of seropositive animals and major serotypes involved were: L. hardjoprajitno (68.89%), L. wolffi (62.22%), L. bratislava (35.56%), L. icterohaemorrhagiae (8.89%) and L. pomona (6.67%). Among the sites studied found a higher frequency of Leptospira spp. in the town of Campo Seco (10/11), but this had a smaller variety of serovars. Also compared three properties within the same locality, in which one stood out with a smaller number of positive animals (18.18%) (2/11), and as the main reasons the use of artificial insemination and the negative serological test bull used in transfer in reproductive management. Therefore, serologic testing is very important to identify the prevalent serotypes in the herd, aiming to identify the possible source of infection to seek a control strategy and to use the correct vaccine. It follows that it is necessary to further study the municipality, using a sample with a larger number of animals to accurately determine the prevalence of leptospirosis in the region.