[Malaria in the state of Paraná, Brazil].

To collect data regarding registered cases of malaria in the state of Paraná, attendance reports of suspected cases of malaria performed by Fundação Nacional de Saúde, Paraná regional center, were analyzed from January, 1994 through December, 1999. Of 31,975 blood samples examined, 7.4% were positive: 86.4% for Plasmodium vivax, 12.7% for P. falciparum, 0.04% for P. malariae and 0.9% for P. vivax and P. falciparum. As to the epidemiological classification, 84.5% represented heterochthonous cases and 15.5% represented autochthonous cases. The municipalities showing higher rates of autochthonous cases were Foz do Iguaçu, Santa Terezinha do Itaipu and Santa Helena, a region influenced by the Itaipu reservoir, where prevention and control actions must be concentrated.