Author: Department of Health and Human Services, Centers for Disease Control and Prevention
Almost 14% of the U.S. population is infected with Toxocara, a parasite of dogs and cats that can be passed from animals to humans. The results of the study that looked at the representative sample of the U.S. population show that Toxocara infection is more widespread and common than previously understood.
The results of the study were presented November 5, 2007 at the annual meeting of the American Society of Tropical Medicine and Hygiene in Philadelphia.
Although most persons infected with Toxocara have no symptoms, the parasite is capable of causing blindness and other systemic illness. The CDC study shows transmission of Toxocara is most common in young children and youth under the age of 20 years. Non-Hispanic Blacks have the infection more than Mexican Americans and non-Hispanic Whites of all age groups. All children are more likely to be infected as children tend to play in and sometimes eat contaminated soil. Dog ownership was associated with infection.