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Am. J. Trop. Med. Hyg., 44(6), 1991, pp. 598-603
Copyright © 1991 by The American Society of Tropical Medicine and Hygiene

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Comparative Susceptibility of Anopheline Mosquitoes to Plasmodium Falciparum in Rondonia, Brazil

Terry A. Klein, Jose B. P. Lima AND Mauro S. Tada
US Army Medical Research Unit-Brazil, American Consulate-Rio, APO Miami, Florida; Unidade Mista-Costa Marques, Secretaria de Estadada de Rondonia, Avenida Limoeira S/N, Costa Marques, Rondonia, Brazil; Nucleo de Medicina e Nutricao, Universidade de Brasilia, Brasilia DF, Brazil

Five anopheline species, Anopheles deaneorum, An. albitarsis, An. triannulatus, An. oswaldoi, and An. mediopunctatus were compared to An. darlingi for susceptibility to infection by P. falciparum in Costa Marques, Rondonia, Brazil. Laboratory reared F1 An. darlingi and anopheline test species were allowed to feed at the same time on falciparum malaria patients who had gametocytes in their blood, and who had not yet been treated with quinine. Mosquitoes were dissected and examined for occysts on day 9, and for sporozoites on days 16–20 after feeding. Anopheles mediopunctatus had higher mean numbers of oocysts and oocyst positive rates than An. darlingi. The oocyst positive rate and the mean number of oocysts in An. deaneorum and An. darlingi were similar. Anopheles triannulatus and An. oswaldoi had fewer oocysts than An. darlingi. The salivary gland sporozoite infection rate was similar for An. mediopunctatus and An. deaneorum and much lower for An. triannulatus and An. oswaldoi when compared to An. darlingi. Anopheles albitarsis developed oocysts, but sporozoites did not invade the salivary glands. In relative levels of susceptibility to P. falciparum, An. darlingi was equal to An. mediopunctatus which was greater than An. deaneorum, which was greater than An. triannulatus, which was greater than An. oswaldoi.




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Copyright © 1991 by the American Society of Tropical Medicine and Hygiene.