Leptospirosis is a widespread zoonosis of great social and economic importance for swine production sistem. Two hundred and ninety-eight sows from farms in the north of Paraná state were studied to individualize management practices or environmental condition that are related to risk of leptospirosis infection. All the animals were submitted to the microscopic seroaglutination test and an epidemiological questionnaire was filled out for each one to investigate variables that could be associated with this infection. The results were submitted to the c² test, followed by multivariate analysis. Antibody titers of >100 were detected in 132 sows (44.3%) most frequently against icterohaemorrhagiae serovar (98.5%). The final model of multivariate analysis showed the risk factors to be flooded areas near the installation (OR=1.73; 1.04<IC95%<2.80), canal type water source (OR=1.58; 0.98<IC95%<2.55) and absence of cleaning of the water reservoirs (OR=2.25; 0.79<IC95%<6.43).
leptospirosis; sows; risk factors; diagnostic
