Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis infection. Except hair, teeth and nails, all organs and systems of the human body may be infected by tuberculosis, but more than 80% of tuberculosis invades the lungs, which is called tuberculosis, commonly known as "tuberculosis".
Tuberculosis patients with bacteria in sputum are the main source of infection, and the transmission route of tuberculosis is mainly respiratory transmission. When patients with infectious tuberculosis cough, sneeze, laugh loudly, and even sing, they will spit out droplets with tuberculosis bacteria and suspend them in the air for a long time. If healthy people inhale this droplet nucleus with bacteria, it may cause infection and become a tuberculosis patient. If not treated in time, it may infect family and friends and affect them.
According to the survey, if patients with infectious pulmonary tuberculosis are not treated in time, they will infect 10 ~ 15 healthy people every year on average, and it is easier to spread in a densely populated and poorly ventilated environment.