I wanna know in detail that how long TB Bacteria can survive in the air in a closed locked and dark room in normal tempreture? please i wanna know in detail how much year, month, week or days? Plz i want exactly answer in detail. Because i am going to start exercise in that room and previously i won from TB disease and i stopped drugs last month. i have gone in that room many time when my disease was active when i was coughing. Unfortunately i cant replace airs from that room. so that its important to know how long the Bacteria can survive there