Increased leptospirosis incidence following flooding in Rio Grande do Sul, Brazil.

This study investigates the impact of flood events on leptospirosis incidence and mortality in Rio Grande do Sul State, Brazil. The study compared monthly data from 2007 to April 2024 (before flood) with data from 67 days following the flood event in May 2024. Data indicate significant fluctuations in confirmed cases and deaths across the years, with a notable increase in leptospirosis cases and mortality rates following the 2024 flood events. These findings suggest that floods potentiate the spread of leptospirosis due to contaminated water sources. The most affected demographic was the 20-59 age group, highlighting the need for targeted interventions. Establishment of emergency medical services, implementing robust disease prevention measures, and enhancing healthcare and sanitation infrastructure are necessary to mitigate the health impacts of future floods. This study emphasizes the importance of comprehensive disaster preparedness and response strategies to safeguard public health against increasingly frequent extreme climate events.