Infective endocarditis after tooth extraction is probably due to ?
**Core Concept**
Bacteremia can occur after dental procedures, such as tooth extraction, and is a known risk factor for infective endocarditis, a condition characterized by infection of the heart valves.
**Why the Correct Answer is Right**
The presence of virulent bacteria in the bloodstream can lead to colonization and infection of pre-existing heart valve abnormalities, such as bicuspid aortic valve or mitral valve prolapse. This is particularly concerning in individuals with a history of previous endocarditis or those with certain cardiac conditions. The bacteria can adhere to the valve surface and form a biofilm, leading to inflammation and potential valve destruction.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while dental procedures are a known risk factor for infective endocarditis, they are not the most common cause. Other factors such as intravenous drug use and nosocomial infections are more prevalent.
**Option B:** This option is incorrect because while certain medical devices such as central venous catheters can increase the risk of infective endocarditis, they are not directly related to tooth extraction.
**Option C:** This option is incorrect because while certain medical conditions such as cancer can increase the risk of infective endocarditis, they are not directly related to tooth extraction.
**Clinical Pearl / High-Yield Fact**
The American Heart Association recommends that patients with certain cardiac conditions undergo prophylactic antibiotic therapy before dental procedures, including tooth extraction, to reduce the risk of infective endocarditis.
**Correct Answer: D. Bacteremia following dental procedures.**