What is "gastrodiscoides"

Gastrodiscoides is genus of zoonotic fluke under the class Trematoda. It has only one species, Gastrodiscoides hominis. It is a parasite of a variety of vertebrates including human. In fact the first definitive specimen was described from human subject in 1876. It is prevalent in Bangladesh, India, Burma, China, Kazakhstan, Philippines, Thailand, Vietnam, and Volga Delta in Russia; with isolated cases from Africa, such as Nigeria.

Its natural habitat is the colon of pigs, and has also been found in rhesus monkey, orang-utan, fish, field rats and Napu mouse-deer. In humans the habitat is on the wall of the caecum.