What is the mode of transmission for Tuberculosis?

The mode of transmission for Tuberculosis (TB) is primarily through airborne droplet nuclei. When an individual with active TB coughs, sneezes, talks, or even breathes, they release tiny droplets into the air that contain the bacteria Mycobacterium tuberculosis. These droplets can remain suspended in the air for a significant amount of time, making it possible for another person to inhale them. This airborne transmission pathway is crucial in understanding how TB spreads, especially in enclosed or crowded spaces.

In contrast, while contaminated surfaces, direct contact with infected bodily fluids, and insect bites can be modes of transmission for other diseases, they do not play a significant role in the transmission of TB. TB is not transmitted through surface contact or from insect vectors, which is why airborne droplet nuclei is recognized as the primary means of spreading the disease. This distinction is important for effective infection control practices, emphasizing the need for proper ventilation and the use of masks in settings where TB transmission may occur.