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Relationship between body size of adult Anopheles gambiae s.l. and infection with the malaria parasite Plasmodium falciparum

Published online by Cambridge University Press:  06 April 2009

E. O. Lyimo  and
J. C. Koella
E. O. Lyimo
Affiliation:
Ifakara Centre, Box 53, Ifakara, Tanzania
J. C. Koella
Affiliation:
Swiss Tropical Institute, Socinstrasse 57, CH-4002 Basel, Switzerland
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Summary

The influence of adult female body size of Anopheles gambiae s.l. on development of midgut and salivary gland infections by the parasite Plasmodium falciparum was investigated in a field study carried out in Tanzania. The proportion of mosquitoes infected during a blood meal was independent of size. However, the number of oocysts harboured by infected mosquitoes increased with size of the mosquito. The proportion of mosquitoes with sporozoites, and thus potentially infective to humans, was highest in intermediate-sized mosquitoes, whereas the largest and smallest mosquitoes were less likely to have sporozoites. This pattern is interpreted as a combination of high survival rate of large, uninfected mosquitoes and of low survival rate of mosquitoes infected with many oocysts.

Keywords

Anopheles gambiaebody sizemalariaPlasmodium falciparumoocystsporozoitetransmission
Type
Research Article
Information
Parasitology , Volume 104 , Issue 2 , April 1992 , pp. 233 - 237
Copyright
Copyright © Cambridge University Press 1992

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