Tripanosomíase bovina em rebanhos leiteiros no estado de Mato Grosso

Abstract

In this work, we observed the occurrence, clinical and laboratory findings of outbreaks of trypanosomiasis caused by T. vivax in three dairy farms, Mato Grosso State, Brazil. In addition, the possibility of iatrogenic transmission of this protozoan, through the reuse of needles and syringes was evaluated. Blood samples from 213 cows from these properties were tested by blood smear and polymerase chain reaction (PCR). The results were arranged in a 2x2 contingency table, and compared by the Chi-square test, using a significance level of 0.05. One animal on each property was necropsied, and organ fragments were collected for histological and microbiological examination. Among the animals that presented the disease, neurological manifestations were observed, as well as secondary infection by Salmonella enterica enterica sorovar O: 4,5. There was no statistical association of infection with the reuse of needles and syringes.