A skin lesion or ulcer that appears at the site of infection with trypanosomiasis (sleeping sickness), marking where the parasite entered.
From African languages, particularly those of Central Africa where sleeping sickness is endemic. The term entered medical terminology through observations of the disease in regions where it was most prevalent, possibly derived from Bantu language roots.
A chagoma is like the body's warning sign for sleeping sickness—it's the red, swollen skin lesion that appears where the tsetse fly bit you, and seeing one meant you had days or weeks before the parasite reached your brain.
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