The epidemiology of the transmission of malaria parasites varies ecologically. To observe some entomological aspects of the malaria transmission in an urban environment, a longitudinal survey of anopheline fauna was performed in Boa Vista, Roraima, Brazil. A total of 7,263 anophelines was collected in human bait at 13 de Setembro and Caranã districts:
Anopheles albitarsis sensu lato
(82.8%),
An. darlingi (10.3%),
An. braziliensis (5.5%),
An. peryassui (0.9%) and
An. nuneztovari (0.5%). Nightly 12 h collections showed that
An. albitarsis was actively biting throughout the night with peak activities at sunset and at midnight.
An. darlingi bit during all night and did not demonstrate a defined biting peak. Highest biting indices, entomological inoculation rates and malaria cases were observed seasonally during the rainy season (April-November). Hourly collections showed host seek activity for all mosquitoes peaked during the first hour after sunset.
An. darlingi showed the highest plasmodial malaria infection rate followed by
An. albitarsis,
An. braziliensis and
An. nuneztovari (8.5%, 4.6%, 3% and 2.6%, respectively).
An. albitarsis was the most frequently collected anopheline, presented the highest biting index and it was the second most frequently collected infected species infected with malaria parasites.
An. albitarsis and
An. darlingi respectively, are the primary vectors of malaria throughout Boa Vista.
