Leptospira infection rates among 1,585 participants of the slum community cohort according to gender.

Abbreviations: CI: confidence intervals adjusted according to design effect, PY: person-years of follow-up.aRates expressed as infections per 1,000 person-years.bPrimary infection was defined as an increase in the microscopic agglutination test (MAT) titer for any of the tested serovars from zero in the first test to at least 50 in the second test.cSecondary infection was defined as an increase in the MAT of four-fold from an initial titer ≥25.