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Chagas disease may be a threat in South Texas, says researcher
Date:10/6/2011

AUSTIN, TexasChagas disease, a tropical parasitic disease that can lead to life-threatening heart and digestive disorders, may be more widespread in Texas than previously thought, according to research from The University of Texas at Austin.

"We've been studying this for four years now, and this year the number of disease-causing insects is quite amazing," says Sahotra Sarkar, professor of integrative biology and philosophy at The University of Texas at Austin and lead author of a paper on the disease published in PLoS Neglected Tropical Diseases.

Endemic to rural areas of Latin America, Chagas disease is often transmitted by triatomine bugs, also known as "kissing bugs."

In order to assess the prevalence of Chagas disease in Texas, Sarkar is working with a network of health professionals and researchers around the state. After collecting and classifying insects from the field, Sarkar sends them to Philip Williamson, an assistant professor at The University of North Texas Health Science Center. Williamson determines how many of the bugs carry the protozoa Trypanosoma cruzi, which causes the disease.

From the data Sarkar creates epidemiological maps showing the number and location of carrier insects, recorded human Chagas infections and hospitable habitats for the insects.

The maps suggest South Texas is an area of high risk for Chagas infection. Sarkar says there may already be hundreds of undiagnosed cases of the disease.

Chagas can be hard to detect because it can look like the flu at first, with symptoms similar to pains and fever. The symptoms appear to go away but the disease can live in a person for decades, sometimes reappearing in the form of digestive or heart failure.

In Texas, where most doctors are not familiar with the disease and are not required to report it to public health officials, they may misinterpret its late-onset symptoms as an old age problem, says Sarkar.


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Contact: Daniel Oppenheimer
oppenheimer@mail.utexas.edu
512-232-0682
University of Texas at Austin
Source:Eurekalert  

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