Beth has a nosocomial infection. How did she get it?

A nosocomial infection is one that is acquired in a healthcare setting, particularly a hospital, after a patient has entered the facility for treatment. These infections are often the result of exposure to various pathogens present in the hospital environment, which can include bacteria, viruses, and fungi, often resistant to standard antibiotics.

Spending three days in a hospital is the scenario in which a patient would most likely encounter harmful microorganisms, especially if they are undergoing treatment or surgery, where their immune system may be compromised. The close proximity of patients, staff, and visitors, along with the use of medical instruments and devices, increases the risk of infection.

The other scenarios, such as hiking in the woods, having a massage at a local hotel, or eating contaminated food, do not typically involve the kind of environmental exposure associated with hospitals. These options describe potential ways to contract infections but do not specifically relate to the context of a nosocomial infection, which is intrinsically tied to the healthcare setting.