Among them are flatworms, roundworms, and thorny-headed worms (spiny-headed worms). The risk of parasitic worm infection is higher in rural or developing regions.

Roundworms, also known as ascarids or nematodes, are common parasites that live inside your dog’s intestines. They feed on partly digested food. Most dogs get them at one time or another.

There are at least 20,000 different species, but the main three types include flatworms, roundworms and segmented worms, according to Britannica. The earthworm, the worms you commonly see after it ...

Find out what you need to know about roundworms in cats. Learn about the symptoms and treatment and the danger posed to humans.