Tuberculosis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]

Overview

Classification

CDC TB Classification for Immigrants and Refugees

The U.S. Citizenship and Immigration Services has an additional TB classification for immigrants and refugees developed by the Centers for Disease Control and Prevention (CDC). The 'B Notification Program' is an important screening strategy to identify new arrivals who have a high risk for TB.

United States Immigrant/Refugee TB Classification
Class Chest X-ray AFB smear Restrictions
A - TB, infectious Active TB Positive No entry to U.S. until treated and smears are negative
B1 - TB, clinically active, not infectious Active TB Negative Report to local health department for further medical evaluation within 30 days of arrival in U.S.
B2 - TB, not clinically active Inactive TB Not required unless symptomatic Same as above
No class (Normal) Normal Not required None


References

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