10 Parasites That May Be 
Living In Or On Your Body 

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. Parasitism is a non-mutual symbiotic relationship between species. 

Parasite also includes microparasites, which are typically smaller, such as viruses and bacteria. Some examples of parasites include the plants mistletoe and cuscuta, and animals such as hookworms.