Causes
Mammals can get parasites from contaminated food or water, bug bites, or sexual contact. Ingestion of contaminated water can produce Giardia infections.
Parasites normally enter the body through the skin or mouth. Close contact with pets can lead to parasite infestation as dogs and cats are host to many parasites.
Other risks that can lead people to get parasites are walking barefeet, inadequate disposal of faeces, lack of hygiene, close contact with someone who carries specific parasites, eating undercooked or exotic foods.
Read more about this topic: Parasitic Disease