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During the congress, E-Posters will be accessible to all participants on the congress website 24/7, as well as in the E-poster stations in the congress center.
Preparing your E-Poster
Please review the E-Poster format requirements carefully when preparing your E-Poster. Should your E-Poster not meet the mentioned requirements, it may not be displayed as described above.
E-Poster Submission Deadline
Please prepare and upload your E-Poster no later than March 14, 2026 11.59PM CET. After this date, you will no longer be able to prepare and upload your E-poster and it will not be displayed and accessible on the congress website.
Please follow the instructions below to input your abstract title.
Abstract titles should be brief and reflect the content of the abstract.
Leptospirosis is a tropical zoonosis notable for its high frequency of acute kidney injury among affected patients. In Brazil, it is an endemic disease with seasonal exacerbations during rainy periods, mainly due to floods associated with densely populated low-income areas, inadequate sanitation, and a high infestation of infected rodents. The state of Ceará presents high levels of socio-environmental vulnerability, particularly in its capital, where urban drainage is insufficient. Therefore, this study aimed to analyze the correlation between rainfall index and the incidence of leptospirosis cases in a vulnerable region of Brazil, as well as to describe the epidemiological profile of affected patients.
This was an ecological study based on data from the Epidemiological Bulletin of Leptospirosis of the State of Ceará and the Ceará Foundation for Meteorology and Water Resources (FUNCEME), covering the period from 2007 to 2024. The total number of confirmed cases, incidence (per 100,000 inhabitants), age group, and exposure to risk factors were analyzed.
During the analyzed period, 1,418 cases were confirmed, with an average incidence of 0.90 per 100,000 inhabitants. The year 2009 showed the highest values in the series, with 307 cases (21%) and an incidence of 3.61, followed by 2011, with 123 cases (17%) and an incidence of 1.42. The most affected age groups were 20–34 years (33%) and 35–49 years (24%), with a predominance of males (83%) and urban residents (66%). The main risk factors identified were contact with floodwater or mud (16.42%), presence of rodents (15.52%), as well as exposure to garbage, sewage, vacant lots, and water tanks. The rainfall index reached record levels in 2009 (1213 mm), followed by 2022 (1011 mm) and 2011 (999 mm), contrasting with drought periods in 2012 (365 mm) and 2015 (523 mm). Analysis of pluviometric data from Ceará between 2007 and 2024 reveals a marked interannual variability in rainfall, characterized by alternating periods of excessive precipitation (notably in 2009 and 2022) and severe droughts (such as 2012 and 2015).
This irregularity indicates a progressive shift in rainfall distribution, suggesting the influence of broader climate change dynamics in the northeastern region of Brazil.
These fluctuations not only affect hydrological balance but also modify environmental exposure to waterborne pathogens, particularly in urban areas with precarious sanitation and rodent infestation.
The years with the highest leptospirosis incidence largely coincided with those of greater rainfall, particularly 2009, which recorded both the highest number of cases and the highest rainfall volume. The period from 2020 to 2022 should be interpreted cautiously due to potential underreporting and health system overload during the COVID-19 pandemic. However, not all years of lower incidence corresponded to lower rainfall levels, reinforcing the multifactorial nature of the disease, in which socioeconomic and environmental factors also play a role. Moreover, populations directly exposed to reservoirs (rodents) and to poor sanitation conditions exhibited higher rates of leptospirosis. Therefore, it is essential to strengthen public health policies aimed at mitigating modifiable risk factors and improving sanitation infrastructure.
