The Rio de Janeiro Municipal Health Department in Brazil began its third survey of 2026 on Aedes aegypti mosquito infestation on November 9. It is the last survey before summer, when the mosquito that transmits dengue, Zika and chikungunya proliferates most.
Health surveillance agents visit properties to collect samples and locate breeding sites. Laboratory analysis makes it possible to identify priority areas for mosquito control before temperatures and rainfall increase. The data also show the proportion of properties with larvae and the most common types of containers.
The inspections are part of the city’s SVS na Rua prevention program. By October 31, 2026, agents had carried out more than 10 million inspections and treated or eliminated approximately 1.3 million containers that could harbor larvae. Inspection requests and questions can be directed to the 1746 service center.
