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Epidemiology & Risk Factors

Ascaris infection is one of the most common intestinal worm infections. It is found in association with poor personal hygiene, poor sanitation, and in places where human feces are used as fertilizer.

Geographic Distribution

The geographic distributions of Ascaris are worldwide in areas with warm, moist climates and are widely overlapping. Infection occurs worldwide and is most common in tropical and subtropical areas where sanitation and hygiene are poor.

  • Page last reviewed: January 10, 2013
  • Page last updated: January 10, 2013
  • 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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