Which of the following is included among the four internal parasite worms?

• A. Roundworms
• B. Tapeworms
• C. Hookworms
• D. Heartworms

Answer: (C)

Hookworms are one of the common intestinal parasites that reside in the dog’s gastrointestinal tract. This group also includes roundworms, whipworms, and tapeworms. Heartworms, while worms, live in the heart and pulmonary arteries, not in the intestines, so they’re not counted among the intestinal parasites. That makes hookworms the correct pick because they fit the category of an internal parasite that inhabits the gut. Hookworms attach to the intestinal lining and feed on blood, which can cause anemia, especially in puppies. They can be transmitted through skin contact with larvae in the environment or by ingestion, and puppies can receive them from their mother's milk.