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Screening for Latent Tuberculosis Infection Recommended for Those at Increased Risk

September 6, 2016
Article

The U.S. Preventive Services Task Force (USPSTF) recommends screening for latent tuberculosis infection in populations at increased risk. People who are considered at increased risk include people who were born in or have lived in countries where tuberculosis is highly prevalent, or who have lived in group settings where exposure to tuberculosis is more likely, such as homeless shelters or correctional facilities. The report appears in the September 6 issue of JAMA.

This is a B recommendation, indicating that there is high certainty that the net benefit is moderate, or there is moderate certainty that the net benefit is moderate to substantial.

In the United States, tuberculosis remains an important preventable disease, including active tuberculosis infection, which may be infectious, and latent infection (LTBI), which is asymptomatic and not infectious but can later reactivate and progress to active disease. The precise prevalence rate of LTBI in the United States is difficult to determine; however, based on 2011-2012 National Health and Nutrition Examination Survey data, estimated prevalence is 4.7 percent to 5.0 percent. An effective strategy for reducing the transmission, illness and death of active disease is the identification and treatment of LTBI to prevent progression to active disease. To issue a current recommendation on screening for LTBI, the USPSTF reviewed the evidence on screening for LTBI in asymptomatic adults seen in primary care, including evidence dating from the inception of searched databases.

The USPSTF is an independent, volunteer panel of experts that makes recommendations about the effectiveness of specific preventive care services such as screenings, counseling services, and preventive medications.

The USPSTF found adequate evidence that accurate screening tests are available to detect LTBI. Screening tests include the Mantoux tuberculin skin test (TST) and interferon-gamma release assays (IGRAs); both are moderately sensitive and highly specific.

The USPSTF found no studies that evaluated the direct benefits of screening for LTBI. The USPSTF found adequate evidence that treatment of LTBI with regimens recommended by the Centers for Disease Control and Prevention (CDC) decreases progression to active tuberculosis; the magnitude of this benefit is moderate.

The USPSTF found no direct evidence on the harms of screening for LTBI. The USPSTF found adequate evidence that the magnitude of harms of treatment of LTBI with CDC-recommended regimens is small. The primary harm of treatment is hepatotoxicity.

Source: Journal of the American Medical Association





 
 

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