PLASMODIUM-VIVAX MALARIA INFECTION DIAGNOSED BY INDIRECT FLUORESCENT-ANTIBODY TEST

We present the diagnostically challenging case of a 51-year-old Japane se male who visited Papua New Guinea for one month. Approximately a mo nth after returning to Japan, he experienced a high fever. Malaria was suspected and he was admitted to Tsukuba University Hospital. Althoug h the blood smear did not reveal the malarial parasite, a diagnosis of malaria was made using an indirect fluorescent antibody test (IFAT). The patient was treated and discharged but symptoms returned three mon ths later. This time, the blood smear was positive for malarial parasi tes. IFAT was useful in this case for the early diagnosis of Plasmodiu m vivax and for ruling out infection by Plasmodium falciparum.