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Malaria Journal

, 7:174

First Online: 11 September 2008Received: 28 March 2008Accepted: 11 September 2008

Abstract

BackgroundPlasmodium vivax is estimated to affect 75 million people annually. It is reportedly absent, however, from west and central Africa due to the high prevalence of the Duffy negative phenotype in the indigenous populations. Despite this, non-African travellers consistently return to their own countries with P. vivax malaria after visiting this region. An attempt was made, therefore, to detect the presence of P. vivax parasites in blood samples collected from the indigenous populations of west and central Africa.

MethodsParasite species typing for all four human malaria parasites was carried out by PCR on 2,588 blood samples collected from individuals from nine African malaria-endemic countries.

ResultsMost infections 98.5% were Plasmodium falciparum, Plasmodium malariae was identified in 8.5% of all infections, and Plasmodium ovale in 3.9%. The prevalence of both parasites varied greatly by country. Only one case of P. vivax was detected from Sao Tome, an island off the west coast of Africa, confirming the scarcity of this parasite in Africa.

ConclusionThe prevalence of P. vivax in local populations in sub-Saharan Africa is very low, despite the frequent identification of this parasite in non-African travellers.

Electronic supplementary materialThe online version of this article doi:10.1186-1475-2875-7-174 contains supplementary material, which is available to authorized users.

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Autor: Richard L Culleton - Toshihiro Mita - Mathieu Ndounga - Holger Unger - Pedro VL Cravo - Giacomo M Paganotti - Nobuyuki T

Fuente: https://link.springer.com/







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