Malaria

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Definition

Malaria is an infectious disease caused by a parasite that's transmitted by mosquitoes. The illness results in recurrent attacks of chills and fever, and it can be deadly.

Although malaria has been virtually eradicated in countries with temperate climates, it's still prevalent in tropical and subtropical countries in Africa, Asia, the Middle East, South America and Central America. Evolving strains of drug-resistant parasites and insecticide-resistant mosquitoes continue to make this disease a global health issue. Malaria remains one of the world's leading infectious killers, particularly of children in sub-Saharan Africa.

Most American cases of malaria develop in travelers who have recently returned from parts of the world where malaria is widespread. Generally, Africa carries the highest risk for the most serious cases.

If you're traveling to malaria-endemic places take precautions before, during and after your trip. Treatment for malaria is with antimalarial drugs.

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