Threadworms, which are a type of parasitic nematode, spend a lot of time crawling around on human skin, poking and prodding to find the best place for entry before burrowing in. But disrupting a ...

This is a preview. Log in through your library . Abstract Ninety percent of wild red grouse examined carried threadworms in their intenstinal caeca. Old birds had 30 times as many worms as young birds ...