Who is affected by toxoplasmosis

Toxoplasmosis affects birds and mammals worldwide. The incidence of human toxoplasmosis in any given area is influenced by diet and hygiene practices. Eating infected meat is thought to cause about half of toxoplasmosis cases in the United States.1

Although nationwide toxoplasmosis statistics are not available, various studies reflect that infection with and immunity to Toxoplasma gondii varies widely across the U.S.1 Warm, moist regions have more human toxoplasmosis infections than colder regions.2

Because American women are not routinely screened for toxoplasmosis during pregnancy, it is impossible to know how many pregnant women actually become infected. In the U.S., 1 to 10 newborns are infected in 10,000 births.2


  1. U.S. Department of Health and Human Services (2000). CDC recommendations regarding selected conditions affecting women's health: Preventing congenital toxoplasmosis. MMWR, 49(RR-2): 57–75.
  2. Savoia MC (2004). Toxoplasmosis section of Bacterial, fungal, and parasitic disease. In GN Burrow et al., eds., Medical Complications During Pregnancy, 6th ed., pp. 330–332. Philadelphia: Elsevier Saunders.

Last Updated: June 18, 2009

related physicians

related services

Bon Secours International| Sisters of Bon Secours USA| Bon Secours Health System

This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2010 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.