USCIS to stop accepting the TB skin test
Beginning October 1, 2018, the tuberculin skin test (TST) will no longer be accepted for US Citizenship and Immigration Services (USCIS) immigration exams (1). All US civil surgeons must use a TB blood test (interferon-gamma release assay or IGRA) as the initial screening method when a test for cell-mediated immunity to TB is required. This new requirement aligns with current CDC recommendations stating that IGRA testing is strongly preferred for those who are BCG-vaccinated.
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- Unlike the TST, QFT-Plus does not cross-react with the BCG vaccine – resulting in fewer false positive test results
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1. Emily Jentes. Immigrant, Refugee, and Migrant Health Branch, US Centers for Disease Control and Prevention. "News/Update: Tuberculosis IGRA testing for US civil surgeons". 16th February, 2018.