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Plasmodium vivax: gametocyte infectivity of naturally infected Thai adults

Published online by Cambridge University Press:  06 April 2009

Jetsumon Sattabongkot ,
Nongnuj Maneechai  and
Ronald Rosenberg
Jetsumon Sattabongkot
Affiliation:
Department of Entomology, US Army Medical Component, 315/6 Rajavithi Road, Bangkok 10400, Thailand
Nongnuj Maneechai
Affiliation:
Department of Entomology, US Army Medical Component, 315/6 Rajavithi Road, Bangkok 10400, Thailand
Ronald Rosenberg
Affiliation:
Department of Entomology, US Army Medical Component, 315/6 Rajavithi Road, Bangkok 10400, Thailand
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Summary

Up to 200 laboratory reared Anopheles dirus mosquitoes were fed on each of 496 symptomatic Thai men who had patent, naturally acquired Plasmodium vivax gametocytaemia. Mean gametocyte densities were 455/mm3 (range: 0–3281), geometric mean oocyst number was 9 (0–142), mean frequency of infection was 43% (0–100%), and mean sporozoite number in salivary glands was 9525 (0–285 000). There was little relation between gametocyte density and either oocyst number or frequency of mosquito infection. There were, however, statistically strong positive correlations between oocyst numbers and frequency of infection, and between number of oocysts and number of salivary gland sporozoites. The data suggest that each oocyst contributed about 850 sporozoites to a gland infection.

Keywords

Plasmodium vivaxmalariagametocytesThailand
Type
Research Article
Information
Parasitology , Volume 102 , Issue 1 , February 1991 , pp. 27 - 31
Copyright
Copyright © Cambridge University Press 1991

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