Pigs can be carriers of various helminths, such as roundworms, pinworms, hookworms. It is not effective against other worms such as pinworms or roundworms. Its main use is for protecting livestock against roundworm, strongyles and pinworms. Pinworms are an exception to the tenet that intestinal parasites are uncommon in affluent communities. At external use, they act efficacy against parasites like pinworms. The pinworms can also enter the urethra, and presumably, they carry intestinal bacteria with them. Adult pinworms are occasionally seen during colonoscopy. Diagnosis depends on finding the eggs or the adult pinworms. Pinworms are believed to have affected humans throughout history. Pinworms cannot damage the skin, and they do not normally migrate through tissues. Members of this order are also known as pinworms.