Face masks in operating theatres

Question

What are the reasons for wearing face masks in operating theatres, and do they actually serve any purpose?

Carl Dougliss, senior operating department practitioner (theatres)

Cannock Chase Hospital, Cannock

Answer

To prevent bacteria entering the patient. Aerobic bacteria such as Streptococcus species—normal flora of the human nasal cavity—can pass into the bloodstream of the patient as a result of the surgeon sneezing or even breathing. …