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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 A-Z Index:

Parasites Topics

Malaria

An ancient disease that affects millions of people worldwide...

Neglected Tropical Diseases

Affecting one sixth of the world’s population...

Water

Parasites in drinking water as well as recreational water...

Insects

They’re called "vectors" when they transmit disease …

Neglected Parasitic Infections in the United States

Five parasitic infections that have been targeted by CDC...

Animals/Pets

Parasitic diseases transmitted from animals, maybe your pets...

Food

Parasites can be transmitted by food...

Blood

Some serious parasitic diseases are bloodborne...

 
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  • Page last reviewed: February 1, 2012
  • Page last updated: February 1, 2012
  • Content source: Global Health - Division of Parasitic Diseases and Malaria
  • Notice: Linking to a non-federal site does not constitute an endorsement by HHS, CDC or any of its employees of the sponsors or the information and products presented on the site.
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