Which of the following is NOT a mode of transmission for group A Streptococcus?

The correct answer, indicating that airborne transmission is not a mode of transmission for group A Streptococcus, is based on the characteristics of how this bacterium spreads. Group A Streptococcus primarily transmits through direct contact with skin lesions or through respiratory droplets containing the bacteria, which can occur when an infected person coughs or sneezes. Additionally, it can survive on surfaces and transfer through fomites when someone touches a contaminated object and then their face.

In contrast, airborne transmission refers to the spread of pathogens through tiny aerosolized particles that remain suspended in the air over time and distance. Group A Streptococcus does not typically function in this manner, as it is not associated with transmission via smaller particles that can linger in the air over long distances. This differentiation is crucial in understanding the transmission dynamics of various infectious agents, especially in strategies for infection control and prevention.