A parasitological, cytogenetic and biochemical study of Anopheles gambiae (Diptera: Culicidae) from the People's Republic of Congo.

A sample of 41 live adult members of the Anopheles gambiae complex were obtained from Yaka Yaka, near Brazzaville, People's Republic of Congo. They were collected resting in human habitations. Thirty-seven specimens were identified as A. gambiae s.s. using cytogenetic and electrophoretic criteria. Of the identified sample, one specimen was heterozygous for a previously undescribed inversion on chromosome arm 3. One female and the progeny of a second were found to be polymorphic for a superoxide dismutase electromorph previously only found in A. bwambae and A. arabiensis. Thirty-four specimens were examined for plasmodia. Five had oocysts on their stomachs and 2 had sporozoites in the salivary glands.