In Ribeirão Preto, Brazil, health surveillance agents are struggling to control the Aedes aegypti mosquito, which spreads dengue, particularly during the current summer season. According to the health department, approximately 40% of the homes visited by the disease control teams are either closed or residents refuse to allow entry. This lack of access hampers the effectiveness of their preventive measures as they seek to educate homeowners and inspect areas within the properties that could harbor mosquito breeding sites.

The agents systematically visit neighborhoods based on the concentration of suspected or confirmed dengue cases, population density, and regional characteristics. Their approach involves a door-to-door strategy, offering advice on prevention and examining yards, gutters, drains, water tanks, and any containers capable of holding water—ideal breeding grounds for mosquitoes. However, when they cannot gain access to a property, the inspection is left incomplete, prompting the team to reschedule another visit in hopes of reaching the residents.

Luis Henrique Jardim, a control agent, highlighted the frequent occurrences of non-compliance from residents who do not answer the door, stating that while some are out for work, others simply choose not to engage with the officials. This phenomenon not only delays preventive measures but also potentially contributes to the continued spread of dengue in the region, highlighting the critical need for community cooperation in public health efforts.