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How does tuberculosis spread from one person to another?

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Health monitoring — human disease The routine monitoring of blood pressure levels is an important part of assessing an individual's health. Blood pressure provides information about the amount of blood in circulation and about heart function and thus is an important indicator of disease.

Tuberculosis spreads primarily through the respiratory route when an individual with an active pulmonary tuberculosis infection releases the bacteria into the air.12

When an infected person coughs, sneezes, speaks, or sings, they discharge minute droplets containing the tubercle bacilli. These bacteria can remain suspended in the air, where they may be inhaled by a healthy person. Once inhaled, the bacilli can become trapped in body tissues, leading to infection.12

Transmission is most likely to occur in crowded or poorly ventilated environments and typically requires prolonged or repeated exposure to an infectious individual. It is important to note that tuberculosis is not spread through casual contact, such as touching surfaces, sharing food, or brief interactions with an infected person.2