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Plasmodium ookinete development in the mosquito midgut: a case of reciprocal manipulation

Published online by Cambridge University Press:  16 March 2011

M. Shahabuddin
M. Shahabuddin
Affiliation:
Medical Entomology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Building 4, Room B2-37, Bethesda, Maryland 20892-0425, USA
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Summary

The ookinete is one of the most important stages of Plasmodium development in the mosquito. It is morphologically and biochemically distinct from the earlier sexual stages - gametocytes and zygote, and from the later stages - oocyst and sporozoites. Development to ookinete allows the parasite to escape from the tightly packed blood bolus, to cross the sturdy peritrophic matrix (PM), to be protected from the digestive environment of the midgut lumen, and to invade the gut epithelium. The success of each of these activities may depend on the degree of the biochemical and physical barriers in the mosquito (such as density of blood bolus, thickness of peritrophic matrix, proteolytic activities in the gut lumen etc.) and the ability of the ookinete to overcome these barriers. Ookinete motility, secretion of chitinase, resistance to the digestive enzymes, and recognition/invasion of the midgut epithelium all may play crucial roles in the transformation to oocyst. The overall sporogonic development of Plasmodium, therefore, depends on the results of the two-way manipulations between the parasite and the vector mosquito. Study of ookinete development and of the cellular and biochemical complexities of the mosquito gut may therefore lead to the design of novel strategies to block the transmission of malaria. This article reviews the intricate interactions between the parasite and the mosquito midgut in the context of development and transmission of Plasmodium parasites.

Keywords

InsectmalariamosquitoPlasmodiumvector.
Type
Research Article
Information
Parasitology , Volume 116 , supplement S1: Symposia of the British Society for Parasitology Volume 35: Parasite-insect interactions: reciprocal manipulation , 1998 , pp. S83 - S93
Copyright
Copyright © Cambridge University Press 1998

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