Hymenolepiasis is infestation by one of two species of tapeworm: Alternative names are: ==Causes, incidence, and risk factors== Hymenolepis worms live in the intestines of rats and are common in warm climates. Hymenolepis is generally found in the feces of rats which is consumed by its secondary hosts: beetles. The worms mature into a life form re... Found on http://en.wikipedia.org/wiki/Hymenolepiasis