Common Parasites and Parasitic Diseases

A parasite is an organism that lives on or in another organism to survive. The organism harboring the parasite is called its host. Mostly, a parasite lives, grows and multiplies at the expense of the host. When the parasite invades the host’s organ, a parasitic disease occurs.

In general, there are 3 types of parasites:

1) Protozoa

Protozoa are single-celled microscopic animals.

2) Helminths

Helminths are parasitic worms. They are often visible to the naked eye.

Both protozoa and helminths can be free-living or parasitic in nature. When they’re parasitic, they live inside the host. For instance, when they live off human beings, they could affect the intestines, brain and nervous system, lung, liver, nasal cavity and sinuses, etc.. It’s rare to see eye parasites.

3) Ectoparasites

Ectoparasites, by contrast, live on the surface of the host, such as the skin.

Here is a list of common parasites and parasitic diseases in humans.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.