Parasites

 A parasite is an organism that lives on or in a host and gets its food from or at the expense of its host. Parasites can cause disease in humans. Some parasitic diseases are easily treated and some are not. The burden of these diseases often rests on communities in the tropics and subtropics, but parasitic infections also affect people in developed countries. Parasites are contracted through contaminated water, other human, animals, meats, fruits and vegetables and travel. Different parasites include hook worms, trichinella, round worms, tape worms, round worms, pin worms, and filarial worms.