What is the incubation period for infective endocarditis?

• A. Typically 6-12 hours.
• B. Usually less than 2 weeks.
• C. Several months or longer.
• D. Several years.

Answer: (B)

Endocarditis usually develops within days to a couple of weeks after bacteremia seeds a damaged valve. Once bacteria enter the bloodstream and adhere to the abnormal valve surface, the inflammatory process and vegetation formation progress fairly quickly, so symptoms typically appear within a short window. While there are acute forms that present in days and subacute forms that can take weeks to months, the general expected incubation period is usually less than two weeks. Longer intervals (months or years) would be atypical for the typical course of the infection.