Abstract
In 2007, a Finnish traveler was infected in Peninsular Malaysia with Plasmodium knowlesi, a parasite that usually causes malaria in monkeys. P. knowlesi has established itself as the fifth Plasmodium species that can cause human malaria. The disease is potentially life-threatening in humans; clinicians and laboratory personnel should become more aware of this pathogen in travelers.
Highlights
In 2007, a Finnish traveler was infected in Peninsular Malaysia with Plasmodium knowlesi, a parasite that usually causes malaria in monkeys
We suggest that P. knowlesi infection should be considered in malaria patients who have a history of a travel to forested areas in Southeast Asia, especially if P. malariae malaria is diagnosed or atypical plasmodia are seen with microscopy
The asexual stages of various species of P. knowlesi can be misidentified as P. malariae in light microscopic examination (Figure) [3,7,10]
Summary
In 2007, a Finnish traveler was infected in Peninsular Malaysia with Plasmodium knowlesi, a parasite that usually causes malaria in monkeys. The Study A 53-year-old Finnish man was admitted to a local hospital in Finland in March 2007 with fever after 4 weeks of travel in Peninsular Malaysia. He had not taken any antimalarial prophylaxis. The patient experienced an attack of hypoglycemia (electrocardiogram and blood pressure was normal during this attack), transient mild visual and hearing loss, and transient lymphopenia (a low of 0.46 × 109/L) He received quinine hydrochloride and doxycycline for a total of 10 days. A nested PCR was performed according to a standard protocol with rOva and rPLU2 primers
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