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Introduction | The development cycle of the Anopheles mosquito | The morphology of the Anopheles mosquito | The trophogonic cycle of Anopheles mosquitoes | Human to Anopheles transmission | Anopheles to Human transmission: | The main Anopheles vector species in tropical Africa | The main Anopheles vector species in the Indian Ocean | The main Anopheles vectors species in North Africa | Measurement of the transmission rate in endemic areas | Some examples of transmission rates | Interactions between transmission, morbidity and mortality | A key to the identification of anophelines: the wing | Conclusion | Suggested reading

[08/25/2004]
 Introduction

There are three transmission pathways for malaria:

  • Transmission by the bite of a mosquito vector, also referred to as vectoral transmission. It is by far the largest infection mode.
  • Transmission by blood transfusion with infected blood.
  • Transmission trans-placental in utero, from the mother to the child.  


There exist around 3,300 species of mosquitoes belonging to different genera: Aedes, Culex, Anopheles, etc.. Among the latter, only the Anopheles are potentially capable of transmitting human malaria. There are known to be 422 species of anophelines in the world, among which 68 have been associated with the transmission of the four forms of human malaria. In Africa and the Indian Ocean, only around ten species are concerned. Certain of these species may also transmit Bancroft’s filariasis and arboviruses.

The importance of the Anopheles mosquito is illustrated in areas such as New Zealand, New Caledonia, Micronesia, Polynesia, where the Anopheles mosquitoes are absent and which, for this reason, are malaria free. 

It should be noted the world "anopheles" corresponds to the Latin Anopheles, designating a genus of mosquito, the recommended abbreviation of which is An.

 

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