Five human cases of infection with the simian malaria parasite Plasmodium knowlesi from Palawan, the Philippines, were confirmed by nested PCR. This study suggests that this zoonotic infection is found across a relatively wide area in Palawan and documents autochthonous cases in the country.
Research Institute for Tropical Medicine - Parasitology, Fillinvest Compound, Alabang, Muntinlupa City, Muntinlupa 1781, the Philippines. jluchavez@yahoo.com