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For more than a hundred years travellers in the Amazon valley have brought back tales of a fish that has the unpleasant habit of entering the urethra of men and women bathers, particularly if they should pass urine in the water. By erecting spines on its gill covers the fish could so firmly establish itself, that only a serious surgical operation could effect its removal. So widespread among the natives was a belief in this story, that in various Amazonian waters, bathing is not resorted to without the precautionary protection of the genitals by different contrivances, such as cocoanut shells
The Candirú. The Only Vertebrate Parasite of Man.. Ann Intern Med. 1930;4:410–411. doi: https://doi.org/10.7326/0003-4819-4-4-410_2
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Published: Ann Intern Med. 1930;4(4):410-411.
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