What defines a nosocomial infection?

A nosocomial infection is specifically defined as an infection that is acquired in a healthcare setting, such as a hospital or nursing home, during the course of receiving treatment for other conditions. The term is derived from the Latin word "nosocomium," meaning "hospital." These infections can arise from various sources, including bacteria, viruses, or fungi that patients may encounter while in these environments, often due to compromised immune systems or invasive procedures.

The focus is on infections that develop after admission and are not present or incubating at the time of admission, differentiating them from infections acquired in other settings, such as the home or community. This distinction is vital for monitoring infection control, implementing preventive measures, and understanding public health implications within healthcare facilities.