The prevalence of naturally acquired multiple infections of Wuchereria bancrofti and human malarias in anophelines

Malaria and filaria infection rates were determined for anopheline mosquitoes collected whilst biting and resting in village houses in Papua New Guinea. The number of anophelines infected with both parasites was greater than expected from the infection rates of each parasite and this difference was...

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Bibliographic Details
Published in:Parasitology 1990-06, Vol.100 (3), p.369-375
Main Authors: Burkot, T. R., Molineaux, L., Graves, P. M., Paru, R., Battistutta, D., Dagoro, H., Barnes, A., Wirtz, R. A., Garner, P.
Format: Article
Language:English
Subjects:
Animals
Anopheles - parasitology
Anopheles punctulatus
Culicidae
Diptera
Elephantiasis, Filarial - transmission
Humans
Insect Vectors - parasitology
Malaria - transmission
multiple infections
Papua New Guinea
Plasmodium falciparum
Plasmodium falciparum - growth & development
Plasmodium vivax
Plasmodium vivax - growth & development
Wuchereria - growth & development
Wuchereria bancrofti
Wuchereria bancrofti - growth & development
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Summary:Malaria and filaria infection rates were determined for anopheline mosquitoes collected whilst biting and resting in village houses in Papua New Guinea. The number of anophelines infected with both parasites was greater than expected from the infection rates of each parasite and this difference was significant in resting collections. The excess of multiply infected mosquitoes is probably a result of a vector population composed of individuals with differing numbers of opportunities to become infected. Malaria-positive, Anopheles punctulatus from resting catches had a significantly greater number of Stage 3 Wuchereria bancroftilarvae than malaria-negative mosquitoes. However, multiply infected mosquitoes appear to suffer greater mortality than non-infected or singly infected mosquitoes when the filarial worm reaches the third stage. Any potential increase in transmission resulting from multiple infections is thereby offset by a greater mortality rate in these mosquitoes.
ISSN:0031-1820
1469-8161
DOI:10.1017/S003118200007863X