This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Puerperium, Subject name: Gynaecology & Obstetrics
[{'content': 'This organism may cause epidemics of puerperal sepsis. \nSelect and explain. \nA. Cytomegalovirus, B. Group A b-hemolytic streptococci, C. Group B b- hemolytic streptococci, D. Toxoplasma gondii', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most female pelvic infections are caused by bacteria indigenous to the genital tract. Over the past 20 years, there have been repos of group A b-hemolytic streptococcus causing toxic shock-like syndrome and life-threatening infection Gram-positive cocci--group A streptococci, enterococcus, Staphylococcus aureus, Staphylococcus epidermidis Gram-negative bacteria--Escherichia coli, Klebsiella, Anaerobes Cocci--Peptostreptococcus and Peptococcus species Others--Clostridium, Bacteroides, and Fusobacterium species, Mobiluncus species', 'role': 'assistant'}]