Threadworms are a very common nematode which infect the large intestine. These infections occurs throughout the world. They are also known as pinworms (in most of the world, the UK, Australia and New Zealand being the exceptions) or enterobiasis, as the Latin name for threadworms is Enterobius vermicularis.
This is a companion discussion topic for the original article at https://patient.info/doctor/threadworms-pro