Incidence of dengue cases (2007-2013) and seasonal distribution of mosquitoes (Diptera: Culicidae) (2012-2013) in Barreiras, Bahia, Brazil.

OBJECTIVE to describe seasonal mosquito distribution and the incidence of dengue cases in Barreiras, Bahia, Brazil. METHODS this is a descriptive study using primary data on mosquito distribution in ovitraps from April 2012 to March 2013, as well as secondary data from the Notifiable Diseases Information System, Epidemiological Surveillance and the Zoonosis Control Center about dengue cases and Aedes aegypti infestation rates from January 2007 to March 2013. RESULTS 16,512 mosquito specimens were collected, 62.0% were Culex quinquefasciatus (most frequent in the dry season) and 38.0% were Aedes aegypti (most frequent in the rainy season); 8,373 dengue cases were recorded, with highest incidence per 100,000 inhabitants in 2009 (n=704.5), 2011 (n=429.3) and 2013 (n=247.2), between January and June. CONCLUSION Culex quinquefasciatus and Aedes aegypti occurred in all months; dengue incidence was higher in the rainy season and in alternating years.