Tuberculosis is spread by

Tuberculosis is spread by airborne droplets spread by coughing.

Tuberculosis is an infectious disease caused by the bacterium Mycobacterium tuberculosis, which is primarily transmitted through the air when an infected person coughs or sneezes, releasing droplets that can be inhaled by others.

Tuberculosis is not transmitted through the urethra; rather, it primarily affects the lungs and is spread through the respiratory system. This option incorrectly suggests a mode of transmission that is not associated with tuberculosis, which is fundamentally a respiratory illness.

Insufficient fluid intake does not relate to the transmission of tuberculosis. While hydration is important for overall health, it plays no role in the spread of the bacteria that cause tuberculosis. This choice misrepresents the nature of the disease and its transmission pathways.

This choice accurately describes the primary method of tuberculosis transmission. When an infected individual coughs, tiny droplets containing Mycobacterium tuberculosis are expelled into the air, where they can be inhaled by others, leading to new infections. This respiratory transmission is the hallmark of how tuberculosis spreads.

While lack of proper rest can weaken the immune system and make individuals more susceptible to infections, it does not serve as a means of spreading tuberculosis. This option incorrectly implies that rest is a transmission factor, which it is not in the context of infectious diseases.

Tuberculosis is predominantly spread through airborne droplets released by coughing, making it crucial to understand this transmission route for effective prevention and control. The other options presented either misrepresent the disease's transmission mechanisms or focus on factors that do not contribute to the spread of the infection. Recognizing the true mode of transmission is essential for public health efforts aimed at reducing the incidence of tuberculosis.