Volume 35, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



During the period from May 1983 to July 1985 we conducted an epidemiological study to determine potential vectors of malaria in 6 districts in the state of Pará in northern Brazil. The examination of random human blood smears, prepared at the time of mosquito capture, indicated overall human infection rates of 16.7% and 10.9% for and , respectively. Two immunoassays, the immunoradiometric assay (IRMA) and the enzyme-linked immunosorbent assay (ELISA), based on the use of species-specific antisporozoite monoclonal antibodies, were used to analyze a total of 9,040 field-collected mosquitoes for plasmodial infection. sporozoite antigen was detected in at rates varying from 2.7% to 4.2%, and in small numbers of collected in 1 of the districts. In contrast, sporozoite antigen of was found in , and at rates ranging from 0.9% to 12.0%. By dissection, sporozoites were found in the salivary glands of these same 4 species at rates ranging from 0.8% to 2.2%. The latter 3 species had not previously been implicated as malaria vectors of any significance in northern Brazil.


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  • Accepted : 04 Apr 1986

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