A new challenge for malaria control in Brazil: asymptomatic Plasmodium infection - a review

Memórias do Instituto Oswaldo Cruz

José Rodrigues Coura¹  Martha Suárez-mutis¹  Simone Ladeia-andrade¹ 

[1] ,Instituto Oswaldo Cruz- Fiocruz Departamento de Medicina Tropical Rio de Janeiro RJ ,Brasil

关键词: malaria;    asymptomatic infection;    control;    Brazilian Amazon;   

DOI  :  10.1590/S0074-02762006000300001

来源: SciELO

【 摘 要 】

The evolution of malaria in Brazil, its morbidity, the malaria control programs, and the new challenges for these programs in the light of the emergence of asymptomatic infection in the Amazon region of Brazil were reviewed. At least six Brazilian research groups have demonstrated that asymptomatic infection by Plasmodium is an important impediment to malaria control, among mineral prospectors in Mato Grosso and riverside communities in Rondônia and, in our group, in the middle and upper reaches of the Negro river, in the state of Amazonas. Likewise, other researchers have studied the problem among indigenous communities in the Colombian, Peruvian, and Venezuelan parts of the Amazon basin, adjacent to Brazil. The frequency of positive results from the polymerase chain reaction (PCR) among asymptomatic individuals has ranged from 20.4 to 49.5%, and the presence of Plasmodium in the thick blood smears, from 4.2 to 38.5%. Infection with Anopheles darlingi has also been demonstrated by xenodiagnosis among asymptomatic patients with positive PCR results. If a mean of 25% is taken for the asymptomatic infection caused by Plasmodium sp. in the Amazon region of Brazil, malaria control will be difficult to achieve in that region with the measures currently utilized for such control.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License