This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Blood culture is positive in which infection of staph. aureus- \nSelect and explain. \nA. TSS, B. SSSS, C. Infective endocarditis, D. Impetigo', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Blood culture is positive when bacteria present in blood, i.e. when there is bacteremia.\nInfective endocarditis is a complication of staphylococcal aureus bacteremia (SAB). Thus blood culture may be positive.\nStaphylococcal scalded skin syndrome (SSSS) and impetigo do not have bacteremia.\nIn toxic shock syndrome (TSS) due to staphylococcus aureus, bacteremia is uncommon (in contrast, bacteremia is common in streptococcal TSS).', 'role': 'assistant'}]