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Einstein awarded NIH grant to study drug-resistant TB
Date:6/2/2010

June 2, 2010 (BRONX, NY) The National Institutes of Health (NIH) has awarded scientists at Albert Einstein College of Medicine of Yeshiva University a five-year, $3.9 million grant to study how extensively drug-resistant tuberculosis (XDR-TB) is transmitted in rural South Africa. The findings could alter public health approaches for controlling the XDR-TB epidemic in the developing world.

"Most cases of XDR-TB are thought to arise when people infected with susceptible strains of TB don't take their medications correctly or are prescribed the wrong medications," explained principal investigator Sarita Shah, M.D., M.P.H., assistant professor of medicine and of epidemiology & public health. "These medication failures encourage the growth of drug-resistant strains of TB bacteria a phenomenon known as amplified resistance."

XDR-TB can also arise when someone who never had TB, or who had TB that was cured, is directly infected with a drug-resistant strain of TB. "Person-to-person transmission of XDR-TB was believed to be rare," said Dr. Shah. "But increasing evidence suggests that it's much more common than previously thought. We estimate that two-thirds to three-quarters of XDR-TB cases arise this way."

Dr. Shah will prospectively interview and analyze the medical records of 400 patients with XDR-TB to determine how many new cases develop due to person-to-person transmission compared with new cases of amplified resistance. The study will take place in the area of Tugela Ferry in the KwaZulu-Natal district of South Africa which has exceedingly high rates of XDR-TB.

Adding to their woes, many TB patients in Tugela Ferry are co-infected with HIV, the virus that causes AIDS. (South Africa has more people infected with HIV than any other country in the world.) Studies have found that TB patients co-infected with HIV face a higher risk of developing active TB disease than patients free of HIV. Thus, an HIV-infected person who cont
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Contact: Deirdre Branley
sciencenews@einstein.yu.edu
718-430-3101
Albert Einstein College of Medicine
Source:Eurekalert  

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