This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
[{'content': '73 yrs old Ramlal has intra-abdominal sepsis. The causative organism was found to be vancomycin, gentamycin and ampicillin resistant. It grows well in presence of 6.5% NaCl and arginine. Bile esculin hydrolysis is positive. Which of the following is this organism \nSelect and explain. \nA. Streptococcus agalactae, B. Enterococcus fecalis, C. Streptococcus bovis, D. Streptococcus pneumonia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Option 1, 3, 4 Bile esculin hydrolysis test: Negative: Streptococcus agalactiae, Streptococcus pneumonia Positive: Streptococcus bovis but it does not grow in presence of 6.5% NaCl, pH 9.6 Option 2 Enterococcus fecalis Grow in the presence of bile and hydrolyze esculine - bile esculin positive. Grows in presence of 6.5% NaCl, pH 9.6 which differentiate it from Group D streptococci. Resistant to penicillins, aminoglycosides and sulfonamides. Intrinsic resistance to cephalosporins and cotrimoxazole. Vancomycin resistance is also seen', 'role': 'assistant'}]