Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Malaria
- Overview, Causes, & Risk Factors
- Symptoms & Signs
- Diagnosis & Tests
- Prevention & Expectations
- Treatment & Monitoring
- Attribution
- View All
Overview, Causes, & Risk Factors
Malaria is an infection marked by fever and shaking chills. Four different species of the Plasmodium parasite cause malaria.
What is going on in the body?
Malaria occurs mainly in the tropical areas of the world, including Africa, Asia, and Central and South America. Humans acquire malaria through the bite of a mosquito. There are 4 species of Plasmodium that cause infection.
When an infected mosquito bites a person, the parasite travels through the bloodstream to the liver. The parasite multiplies in the liver. Then it goes back into the bloodstream and attacks the red blood cells. As the red blood cells are destroyed, symptoms begin in the body.
What are the causes and risks of the infection?
The Plasmodium parasite causes infection. The bite of the anopheles mosquito transmits the parasite from person to person. When a mosquito bites a person who has malaria, the parasite multiplies in the mosquito. If the mosquito then bites another person, it can inject the parasite into another person. The infection can also be spread from an infected pregnant woman to the fetus across the placenta.