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Extremely drug resistant TB a growing problem in India

ATS 2007, SAN FRANCISCO -- Extremely drug resistant TB, or XDR-TB, is a serious problem in India, according to a study presented at the American Thoracic Society 2007 International Conference, on Monday, May 21.

The study, the first in India to look at the prevalence of XDR-TB, found this type of TB accounts for 8% of multi-drug-resistant cases, compared with about 4% in the United States.

MDR-TB (multi-drug resistant TB) describes strains of tuberculosis that are resistant to at least the two first-line TB drugs, isoniazid and rifampicin. XDR-TB is MDR-TB that is also resistant to three or more of the six classes of second-line drugs. XDR-TB leaves patients (including many people living with HIV) virtually untreatable using currently available anti-TB drugs.

Recent findings from a survey conducted by the World Health Organization and the Centers for Disease Control and Prevention found that XDR-TB has been identified in all regions of the world but occurs most frequently in the countries of the former Soviet Union and in Asia.

Sushil Jain of the Hinduja National Hospital in Mumbai, India, and colleagues examined 3,904 lab samples at their hospital, and found that 1,274 were positive for Mycobacterium tuberculosis. Of these, 32% were found to be MDR-TB, out of which 8% were XDR-TB. Tuberculosis can infect many sites in the body but most commonly affects the lungs. All XDR-TB cases were in patients with pulmonary tuberculosis, or TB found in the lungs, which can be spread by coughing, sneezing, laughing or singing. Repeated exposure to someone with TB disease is generally necessary for infection to take place.

The death rate of XDR-TB patients in the study was 42%, which Dr. Jain calls "alarmingly high."

"An important finding was that the majority of patients with XDR-TB were of younger age group (their average age was 30 years), thus posing a major threat to our economically productive population," Dr. Jain notes. "Serious ef
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Contact: Suzy Martin
smartin@thoracic.org
212-315-8631
American Thoracic Society
21-May-2007


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