ARRT Patient Care Practice Exam

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What is the mode of transmission for TB?

Airborne
Contact
Vector-borne
Fomite transmission

The correct answer is: Airborne

The mode of transmission for tuberculosis (TB) is airborne. This means that TB pathogens are spread through the air via respiratory droplets expelled when an infected person coughs, sneezes, talks, or sings. These droplets can remain suspended in the air for a period and be inhaled by others, leading to new infections. Understanding that TB is primarily transmitted in this way is crucial for implementing appropriate infection control measures in healthcare settings and in the community to prevent its spread. Other transmission routes, such as contact, vector-borne, or fomite transmission, do not apply to TB. Contact transmission generally refers to the transfer of pathogens through direct physical interaction, while vector-borne transmission involves organisms that transmit pathogens from one host to another, often through bites (such as mosquitoes or ticks). Fomite transmission pertains to the spread of infections via inanimate objects that have been contaminated. Neither of these routes describes how TB is transmitted, reinforcing the importance of recognizing airborne transmission as the correct and most relevant mode for this particular disease.