After how many hours of hospital admission does nosocomial infection occur?: (A) 24 hours, (B) 36 hours, (C) 48 hours, (D) 72 hours
Answer is C. Nosocomial infections can be defined as those occurring within 48 hours of hospital admission, 3 days of discharge or 30 days of an operation. They affect 1 in 10 patients admitted to hospital.  Nosocomial comes from the Greek word nosokomeion meaning hospital (nosos = disease, komeo = to take care of ). This type of infection is also known as a hospital-acquired infection.