Paulo Cesar Gomes, a 56-year-old entomologist, found some mosquito larvae swimming in shallow rainwater inside a car bumper. Captured mosquitos and larvae are kept alive and brought to a city laboratory to be tested for dengue. At locations with positive tests, health agents spray the walls with a product that kills mosquitos and then monitor the location for weeks. In Rio, more than 80% of mosquito breeding sites are located in residential properties, health officials say. Health workers and volunteers went door to door, pacing up and down the narrow streets of Rio's Tabajara working-class neighborhood, or favela, to spread the word.

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Persons: Paulo Cesar Gomes, “, ” Ethel Maciel, Gomes, mosquitos, Maciel, Brazil’s, Oswaldo, Mário Sérgio Ribeiro, Vilza da Costa, ”, ” Maciel Organizations: RIO DE, Rio, Brazil's Health Ministry, Associated Press, World Health Organization, Health Ministry, Oswaldo Cruz Foundation Locations: RIO DE JANEIRO, Rio, Janeiro, Brazil, Rio de Janeiro, Rio's, America, Caribbean