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Study on the natural history of malaria in areas of the Rondonia State - Brazil and problems related to its control






Revista do Instituto de Medicina Tropical de Sao Paulo 30(3): 153-156

Study on the natural history of malaria in areas of the Rondonia State - Brazil and problems related to its control

An overview is given of studies on the epidemiology of malaria in Rondonia State, Brazil. This report is divided into 2 sections: (1) mosquito studies; and (2) parasitological surveys. The vectors of Plasmodium falciparum and P. vivax are Anopheles darlingi (the most important vector), A. triannulatus and A. braziliensis. Serological studies indicated that migrant peoples from non-endemic areas required lengthy periods of exposure to malaria infection to develop anti-sporozoite immunity, and that the development of anti-sporozoite immunity was related to the degree of exposure to infected mosquitoes. Data underlying this report is or will be published elsewhere. An entomological study in Rondonia, Brazil, from 1985 to 1987 showed that the principal vector of malaria was Anopheles darlingi; An. triannulatus and An. braziliensis were also found infected. The authors also studied the antisporozoite immunity to Plasmodium falciparum in the inhabitants of the area by means of an immunoradiometric assay employing a species-specific synthetic sporozoite peptide. The relation between the presence of infected mosquitoes, presence of antisporozoite immunity and positive blood films is discussed. Development of this immunity depended on length of stay in the malarious area and number of attacks of malaria.M.J. Colbourne An entomological study in Rondonia, Brazil, from 1985 to 1987 showed that the principal vector of malaria was Anopheles darlingi; An. triannulatus and An. braziliensis were also found infected. The authors also studied the antisporozoite immunity to Plasmodium falciparum in the inhabitants of the area by means of an immunoradiometric assay employing a species-specific synthetic sporozoite peptide. The relation between the presence of infected mosquitoes, presence of antisporozoite immunity and positive blood films is discussed. Development of this immunity depended on length of stay in the malarious area and number of attacks of malaria.M.J. Colbourne.


Accession: 001959151

PMID: 3065908



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