How does the incidence of schistosomiasis (bilharzia) vary by race?

Updated: Jun 11, 2020
  • Author: Shadab Hussain Ahmed, MD, AAHIVS, FACP, FIDSA; Chief Editor: Michael Stuart Bronze, MD  more...
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The frequency of infection among individuals of specific races is based on the geographic distribution of endemic schistosomiasis in large tropical and subtropical regions of Africa, Asia, the Middle East, and the Caribbean. However, all humans appear equally susceptible if exposed to infested fresh water.

The frequency of some complications appears to vary geographically during infection with the same worm species (eg, ascites is more common in the Middle East than in Brazil).

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