Parasites uses living things like body, place or food to live, and they are living macro or microorganisms. Parasitic Diseases are infectious disease and it can occur because of contaminated food or water, or can occur due to a bug bite, or sexually transmittable. Only some type of parasitic diseases can be treated, where as some parasitic diseases cannot be. The parasites size vary from tiny, one celled organisms called protozoa to worms, which are visible to the naked eye. The contaminated water supply can lead to Giardia infections. Parasitic disease like malaria are common in all other parts of the world.