This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Definition of Nosocomial infection includes - 
Select and explain. 
A. Infection within 24 hours of admission, B. Infection within 48 hours of admission, C. Infection 40 days after discharge, D. Infection within 30 days after discharge
D: Infection within 30 days after discharge
Answer: D: Infection within 30 days after discharge 
Explanation: Ans. is 'd' i.e., Infection within 30 days after discharge * The term hospital infection, hospital-acquired infection or nosocomial infection are applied to infections developing in hospitalized patients, not present or in incubation at the time of their admission.* Such infections may become evident during their stay in hospital or, sometimes, only after their discharge.* Infections are considered nosocomial if they first appear 48 hours or more after hospital admission or within 30 days after discharge.