Malaria — United States
The American traveler reported to ProMED on May 9, 2018 to have acquired _P. falciparum_ malaria during travel to Costa Rica has been determined to have not been infected with malaria.
Although rapid diagnostic testing (RDT) performed at the hospital and PCR testing performed at the state health department were positive for _P. falciparum_, further testing by CDC on the specimen using multiple tests (antigen, PCR, and serology) has been negative, indicating that the initial positive results
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