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Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: mmwrq@cdc.gov. Type 508 Accommodation and the title of the report in the subject line of e-mail. Notice to Readers: New CDC Program for Rapid Genotyping of Mycobacterium tuberculosis IsolatesIn January 2004, the CDC Tuberculosis Genotyping Program was initiated to enable rapid genotyping of isolates from every patient in the United States with culture-positive tuberculosis (TB). The Federal Tuberculosis Task Force recommended nationwide TB genotyping in response to the Institute of Medicine report, Ending Neglect: The Elimination of Tuberculosis in the United States (1,2). Subsequently, TB control programs in 50 states and two large cities (New York and San Diego) were approved to participate in the TB Genotyping Program, which was developed in collaboration with the National TB Controllers Association (NTCA). The TB Genotyping Program contracts with laboratories in California and Michigan, which provide results within 10 working days from two polymerase chain reaction (PCR)-based genotyping tests: mycobacterial interspersed repetitive units (MIRU) typing (3) and spoligotyping (4). In combination, these two tests provide a highly discriminatory method to identify strains. An additional genotyping method, IS6110--based restriction fragment length polymorphism fingerprinting (5), is available to provide further discrimination between strains for isolates with identical PCR results. The mycobacteriology laboratory branch at CDC also participates in the TB Genotyping Program by performing genotyping testing for quality-control purposes. In 2004, NTCA and CDC published the Guide to the Application of Genotyping to Tuberculosis Prevention and Control (6). TB genotyping will help TB-control programs identify recent transmission of TB, detect outbreaks sooner, identify false-positive M. tuberculosis cultures, evaluate completeness of routine contact investigations, and monitor progress toward TB elimination (6,7). References
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This page last reviewed 1/20/2005
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