The authors studied the levei of resistance of Plasmodium falciparum malaria to chloroquine, amodiaquine and the combination of sulfadoxine and pyrimethamine in the City of Porto Velho, State Capital of Rondônia, Brazil. Using a seven day observation test they did not find signiftcant differences in the parasite count averages in the follow-up as well as in the proportions of resistance to the three drugs. Based upon theseflndings they recommend the maintenance of the 4-aminoquinolines in treating uncomplicated forms of falciparum malaria in the area of Porto Velho.
Malaria; Chemotherapy; Resistence to drugs; Amazon basin