Abstract
Contact investigations are crucial to controlling tuberculosis in the United States. In these investigations, the tuberculin skin test has been the primary test to detect tuberculosis infection. Interferon-[gamma] release assays, such as the QuantiFERON-TB Gold In-Tube test, were recently introduced and are intended to address limitations of the tuberculin skin test. However, there are limited data on the use of these tests in contact investigations in congregate settings. We present 2 field-based investigations to highlight potential advantages, limitations, and feasibility of using the QuantiFERON-TB Gold In-Tube test in congregate setting investigations.