The time it takes for TB bacteria to become infectious on clothing is related to factors such as outside temperature, humidity, acidity and alkalinity, and ultraviolet light exposure. Mycobacterium tuberculosis is not contagious when it is killed in 2 to 7 hours in direct sunlight. Mycobacterium tuberculosis can survive on clothing for several months at moderate temperatures. Mycobacterium tuberculosis is relatively resistant to acids and bases and will not be affected for 15 minutes. Mycobacterium tuberculosis can cause tuberculosis, the patient manifests cough, hemoptysis, low-grade fever, night sweats (sweating abnormally after going to sleep, waking up sweating stops), chest pain, and so on, and the disease continues to develop can cause respiratory distress and other symptoms, the patient if there are these symptoms have to do the relevant examination, such as sputum smear examination, bacterial culture, chest X-ray and other related tests. To prevent the transmission of tuberculosis, we should exercise to increase the resistance to disease, do not inhale the air with tuberculosis, and if there are symptoms of tuberculosis, we should actively consult the doctor to avoid delaying the condition.