BASE-LINE ENTOMOLOGICAL DATA FOR A PILOT MALARIA CONTROL PROGRAM IN EQUATORIAL-GUINEA

Entomological studies conducted on the island of Bioko and the mainlan d province, Rio Muni, in Equatorial Guinea provided baseline data for a pilot malaria control program. The main species collected resting in houses at low density were Anopheles gambiae s.l. Giles and Anopheles funestus Giles. An. gambiae s.l. density increased during the rainy s eason, whereas An. funestus populations remained stable during both dr y and wet seasons. Both species tended to be endophilic and were not c ollected resting or biting outdoors. Overall, delayed sporozoite rates were about 10% for both species and were highest in the dry season. A n. gambiae s.l. from the mainland showed resistance to 4% DDT, but the island population was still susceptible. All populations were complet ely susceptible to 5% malathion and 0.025% deltamethrin.