Infection can occur when pathogenic microorganisms gain entry to body tissues. Which route of transmission is likely when a dental nurse works with a colleague who has a cold and is sneezing regularly?

The correct answer is airborne droplets. This type of transmission occurs when an infected person sneezes or coughs, dispersing tiny droplets that contain pathogens into the air. When someone else inhales these droplets, they can become infected with the illness.

In the context of a dental clinic, where close proximity between colleagues is common, sneezing can easily lead to the spread of respiratory infections. The droplets can travel short distances, making it crucial for dental personnel to take preventive measures, such as using masks or practicing good respiratory hygiene, to minimize the risk of transmission.

Other routes of transmission, although relevant in different contexts, do not apply specifically here. Aerosol transmission often refers to smaller particles that remain suspended in the air for extended periods and can travel longer distances, which differentiates it from the larger droplets expelled during sneezing. Direct contact typically involves touching contaminated surfaces or skin, while inoculation injury refers to wounds caused by needles or sharp instruments, which is unrelated to respiratory infections in this scenario.