High malaria transmission intensity in a village close to Yaounde, the capital city of Cameroon.
A 2-yr longitudinal malaria study was undertaken in a suburb of Yaounde, the capital city of Cameroon, in the village of Simbock, approximately 2 km from the city limits. This study allowed assessment of malaria transmission intensity and dynamics in this region before implementation of pyrethroid impregnated bed nets through the national vector control program. Anophelines were captured on human volunteers by pyrethrum spray collections and in resting sites outdoors. Malaria vectors were Anopheles funestus Giles, Anopheles gambiae s.s. Giles (M and S forms), Anopheles moucheti Evans, and Anopheles nili Theobald. An. moucheti was the most abundant mosquito captured during the study, accounting for >54% of total anophelines caught. The annual Plasmodium falciparum Welch entomological inoculation rates measured by enzyme-linked immunosorbent assay were 277 infected bites per human for the first year and 368 for the second year. An. gambiae s.s., An. funestus, An. moucheti, and An. nili were responsible for 23.8%, 26.8%, 39.2%, and 10.2% of malaria transmission, respectively. Malaria transmission is perennial throughout the year. All these vectors were highly anthropophagous because only two out of 566 mosquitoes blood-meal tested were not taken on humans.
Antonio-Nkondjio
Christophe
C
Organisation de Coordination pour la Lutte Contre les Endémies en Afrique Centrale, Yaoundé, Cameroon.
Awono-Ambene
Parfait
P
Toto
Jean-Claude
JC
Meunier
Jean-Yves
JY
Zebaze-Kemleu
Sylvie
S
Nyambam
Rose
R
Wondji
Charles S
CS
Tchuinkam
Timoléon
T
Fontenill
Didier
D
D000818:Animals; D000852:Anopheles; D002163:Cameroon; D005260:Female; D006801:Humans; D007299:Insect Bites and Stings; D007303:Insect Vectors; D008137:Longitudinal Studies; D016778:Malaria, Falciparum / Q000469:parasitology / Q000635:transmission*; D010963:Plasmodium falciparum / Q000302:isolation & purification; D015800:Protozoan Proteins / Q000032:analysis
D015800:Protozoan Proteins; C041595:circumsporozoite protein, Protozoan