Step 1: Understand the definition.
Step 1: Key criteria:
It's an infection.
It occurs *after* hospital admission.
The time frame is "> 48 hours" to rule out pre-existing infections.
Step 2: Define "Nosocomial infection".
Step 2: A nosocomial infection, also called a hospital-acquired infection (HAI), is an infection obtained in a hospital or healthcare setting that the patient didn't have when admitted. The "48-hour rule" is a standard definition used.
Step 3: Assess the choices.
Step 3: "Nosocomial" is the specific medical term. "Community-acquired infection" is the opposite, meaning the infection originated outside a healthcare environment. "Cytotoxic" relates to cell toxicity, and "Comprehensive" is unrelated.