How is tuberculosis transmitted?

Tuberculosis (TB) is primarily transmitted through the air when an infected person with active TB disease coughs, sneezes, speaks, or even sings. The process of transmission involves the release of respiratory droplets containing Mycobacterium tuberculosis into the air. Once released, these droplets can be inhaled by individuals in close proximity to the infected person.

Key points regarding the transmission of tuberculosis include:

1. Airborne Transmission: TB is considered an airborne disease because the bacteria can remain suspended in the air for an extended period, allowing others to inhale the infectious droplets.

2. Close Contact: Transmission is more likely to occur in situations where people spend a significant amount of time in close contact with an infected individual, especially in enclosed or crowded settings.

3. Respiratory Etiquette: Practicing good respiratory hygiene, such as covering the mouth and nose when coughing or sneezing, can help reduce the spread of TB bacteria.

4. Ventilation: Adequate ventilation in living and working spaces can help decrease the concentration of infectious droplets in the air, reducing the risk of transmission.

It's important to note that not everyone exposed to the TB bacteria becomes infected. Factors such as the duration and intensity of exposure, the infectiousness of the person with TB, and the immune status of the individuals involved play a role in determining the likelihood of transmission. Additionally, latent tuberculosis infection (LTBI) does not result in active TB disease and is not contagious.