Intestinal parasites can infect both animals and humans. They live in and feed off a host. Common intestinal parasites include roundworms and hookworms which can be passed from pets to people. It is important to practice good hygiene like washing hands after contact with animals and cleaning up pet waste. Intestinal parasites may not cause obvious symptoms but can still make people sick. Routine deworming and veterinary checkups are recommended to prevent the spread of parasites between pets and their owners.