ELLA MARU STUDIO / SCIENCE PHOTO LIBRARY ELLA MARU STUDIO / SCIENCE PHOTO LIBRARY
Illustration of Leishmania parasite. Leishmania parasites cause the tropical disease leishmaniosis, which is transmitted by bites from infected sandflies. There are two forms of the disease. Cutaneous leishmaniosis affects the skin and mucus membranes, giving rise to an ulcer at the site of the sandfly bite. This mainly heals naturally, although scarring may occur. The more serious kala-azar causes fever and liver damage, and can be fatal. Treatment is with anti-protozoal drugs.
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