It is often referred to as beaver fever since campers and other travelers get it from water contaiminated by beavers. (raisingspot.com)
The infection, Giardiasis or «beaver fever `' is it is frequently called, causes» diarrhea, abdominal cramping, gas, bloating, frequent pale and loose mucous stools, nausea, weight loss and overall listlessness. (professorshouse.com)
Giardiasis (also known as beaver fever) is a disease caused by the flagellate protozoan Giardia lamblia (also Giardia intestinalis). (sciencedaily.com)