Serological profile of bovine leptospirosis in cows slaughtered in slaughterhouse of Colíder, Mato Grosso

Bovine leptospirosis has often been studied in several Brazilian States due to its importance itself and high herd prevalence. Using the microscopic agglutination test (MAT), we sought to determine the frequency of leptospiral agglutinins in sera of cows slaughtered between June and September 2013 in slaughterhouse located in Colider, northern of Mato Grosso. There were examined 246 to 256 samples according to the availability of serum for all 20 serovars tested. According to the MAT, altogether 102 samples were classified as negative besides 297 positive reactions, as follows: 71 animals reagents only to 1 sorovar and 83 for 2 or more serovars of Leptospira spp . The frequency of positive reactions to sorovar Lagoa was the highest among serovars with 101 occurrences, representing 34% of the total of 297; followed by Bolivia (n = 87, 29.3%) and Australis (n = 30, 10.1%) serovars. In terms of frequency, the 101 positive animals identified by SAM represent 39.8% of the total of 254 animals tested for serovar Lagoa; followed by serovar Bolivia with 35.4% of positivity in 246 sera tested. For serovars Celledoni, Hebdomadis, Norma, Shermani and Szwajizak, no positive reactions were found. .