Final answer:
S. aureus is transmitted through inhalation by respiratory droplets when an infected person coughs or sneezes. Asymptomatic nasal carriers contribute to its spread, which is exacerbated by antibiotic-resistant strains like MRSA.
Step-by-step explanation:
S. aureus transmits through inhalation by means of respiratory droplets that are expelled when an infected person coughs or sneezes. The aerosols produced contain the bacteria and can be inhaled by others, leading to a new host becoming infected. Due to many people being asymptomatic nasal carriers of S. aureus, the spread in community settings, like schools and workplaces, and especially in hospitals, is a significant concern. This risk is augmented with antibiotic-resistant strains such as MRSA. Aerosols are a critical mechanism for the transmission of respiratory pathogens, and simple measures like covering your mouth when coughing or sneezing can significantly reduce their spread, as highlighted by the Centers for Disease Control and Prevention.