Dictionary of Human Evolution and Biology

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Group of related diseases caused by parasitic microorganisms called schistosomes, or blood flukes; these agents are flatworms in the genus Schistosoma that cause symptoms in mammalian hosts, including humans, referable to (a) the intestine and liver, with concomitant dysentery, or
(2) the bladder, resulting in blood passage into urine. The flukes are vectored by several species of snail. There are multiple clusters of endemicity, found worldwide; agents and vectors vary by region. Aka bilharziasis, snail fever.

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