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 acquire parasites are walking with barefeet, inadequate disposal of feces, lack of hygiene, close contact with someone carrying specific parasites, and eating undercooked foods, unwashed fruits and vegetables or foods from contaminated regions. Parasites can also be transferred to their host by the bite of an insect vector, i.e. mosquito, bed bug, fleas.
Parasitic disease
Infectious diseases 
Blood-borne disease
Tropical disease
Autoimmune/inflammatory syndrome induced by adjuvants
Skin and skin structure infection
Viral disease
Skin infection