Final answer:
The most common causative agent of bacterial endocarditis is Streptococcus viridans, which can enter the bloodstream after dental procedures and lead to inflammation of the heart lining. Therefore correct option is D
Step-by-step explanation:
The most common causative agent of bacterial endocarditis is D) Streptococcus viridans. Endocarditis is an inflammation of the endocardium, typically caused by bacterial infection. Streptococcus viridans, part of the group of viridans streptococci, usually enter the bloodstream during dental procedures or other activities that might cause a breach in the barrier defenses of the body.
Individuals with underlying heart conditions, such as damaged heart valves, prosthetic heart devies, or a history of rheumatic fever have an increased risk of developing endocarditis. Diagnosis often involves blood cultures, an echocardiogram, and examination of clinical symptoms, with treatment typically including high doses of intravenous antibiotics. It is crucial to treat this condition promptly, as it can rapidly destroy heart valves and lead to severe consequences, including death.