Malaria N° 7 - Subject N° 7

TRANSMISSION OF MALARIA AND BANCROFTIAN FILARIASIS IN MAGODA, NORTH-EAST TANZANIA
L.E.G. Mboera, E.M. Pedersen, F.M. Salum, F.H. Msuya & E.Z. Sambu

SUMMARY
Mosquitoes were collected using CDC light traps hung beside untreated bednets in six houses fortnightly over a 12-month period in Magoda area of north-east Tanzania. The predominant mosquito species was Anopheles funestus (48.4%) followed by An. gambiae s.l. (42.5%) and Culex quinquefasciatus (3.9%). dissections of these mosquito species revealed mean parous rates of 57.4% (n=788) and 31.4% (n=121) respectively. Malaria sporozoites were determined by ELISA. Plasmodium falciparum infection rate was 7.4% in An. gambiae and 4.7% in An. funestus .Of the parous Anopheles mosquitoes, 1.8% and 1.6% of An funestus and An. gambiae s.l. respectively harboured infective third-stage larvae (L3) of Wuchereria bancrofti. the respective filarial infection rates in these species were 6.6 and 5.7%. The malaria inoculation rates for the period of study were estimated at 149 infective bites per person per year in An. funestus and 198 infective bites per person per year in An. gambiae s.l. The filarial inoculation rate was estimated at 57 and 43 infective bites per person per year in An. funestus and An. gambiae s.l. respectively.

KEY WORDS: Anopheles funestus, Anopheles gambiae, Culex quinquefasciatus, Malaria, Bancroftian filariasis, Tanzania.