Internal helminth parasites include roundworms, tapeworms and flukes. Pigs can be carriers of various helminths, such as roundworms, pinworms, hookworms. These include hookworms, roundworms, and other amoebas. Hookworms are intestinal, blood-feeding, parasitic roundworms that cause types of infection known as helminthiases. It utilizes moxidectin for control and prevention of roundworms, hookworms, heartworms, and whipworms. Endoparasites known to infect wolves include&colon; protozoans and helminths (flukes, tapeworms, roundworms and thorny-headed worms). He also distinguished earthworms from helminths (like tapeworms, flukes, and roundworms). Parasites include mites, lice, fleas, roundworms and flatworms. They identify parasites such as roundworms, Guinea worms, threadworms, and some tapeworms of unknown varieties. This drug works effectively against the main parasitic roundworms and tapeworms of dogs and cats. It is not effective against other worms such as pinworms or roundworms. These include Cestoda (tapeworms), Acanthocephala (thorny headed worms), Nematoda (roundworms), Digenea and Spirurida. Other problems include parasitic nematodes (roundworms) and viruses. Predators include fish, gastropods (snails), and nematodes (tiny roundworms). It belongs to a group of nematodes called roundworms.