Liver flukes are very successful group of parasites that can infect many different hosts including humans. They can be found in different forms and sizes, and found almost all of the world. In Denmark, two species are found. The well-known "common liver fluke" has existed in Denmark since the Vikings, but is increasing again recently. Not so known is "the lancet fluke", which is also fascinating as it can make the ants behave like zombies
