"Active tuberculosis" refers to a contagious bacterial infection that affects the lungs (and sometimes other parts of the body). It means that the bacteria are currently multiplying and causing symptoms in the person. Full definition
Chiacchio T, Petruccioli E, Vanini V, Butera O, Cuzzi G, Petrone L, Matteucci G, Lauria FN, Franken KL, Girardi E, Ottenhoff TH, Goletti D. Higher frequency of T - cell response to M. tuberculosis latency antigen Rv2628 at the site of active tuberculosis disease than in peripheral blood. (euvaccine.eu)
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. (sciencedaily.com)
The recently published Systematic screening for active tuberculosis: an operational guide provides guidance on how to target and tailor TB screening, as this allows to detect active disease and to provide immediate treatment, thus breaking possible transmission among the refugees and their close contacts. (sciencedaily.com)