I wish to correct a horrible misunderstanding brought about by a vicious propaganda effort: Beavers are not the main source of giardiasis.
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"Beavers usually get the rap for spreading Giardia (some people call it Beaver Fever), but William Bemrick, a University of Minnesota researcher, said beavers are blamed far too often. He cited studies on muskrats that showed them to carry even more cysts than beavers that lived nearby. Bemrick also pointed out that infected humans do more than their share of spreading the disease. Three-hundred million cysts may be present in one milligram of human feces, Bemrick wrote, and these cysts can survive for a month in cool water."
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