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An 8-year-old boy is brought to his pediatrician by his parents because of a fever and a sore throat. On examination, he has tonsillar exudates and swollen, tender anterior cervical nodes. His parents report no history of cough. Gram stain of the tonsillar exudate reveals gram-positive cocci. Which of the following describes the organism most likely causing this patient’s symptoms?
(A) Catalase-negative, α-hemolytic, optochin- resistant
(B) Catalase-negative, α-hemolytic, optochin- sensitive
(C) Catalase-negative, β-hemolytic, bacitracin- resistant
(D) Catalase-negative, β-hemolytic, bacitracin- sensitive
(E) Catalase-positive, coagulase-negative, novobiocin-resistant
(F) Catalase-positive, coagulase-negative, novobiocin-sensitive
An 8-year-old boy is brought to his pediatrician by his parents because of a fever and a sore throat. On examination, he has tonsillar exudates and swollen, tender anterior cervical nodes. His parents report no history of cough. Gram stain of the tonsillar exudate reveals gram-positive cocci. Which of the following describes the organism most likely causing this patient’s symptoms?
(A) Catalase-negative, α-hemolytic, optochin- resistant
(B) Catalase-negative, α-hemolytic, optochin- sensitive
(C) Catalase-negative, β-hemolytic, bacitracin- resistant
(D) Catalase-negative, β-hemolytic, bacitracin- sensitive
(E) Catalase-positive, coagulase-negative, novobiocin-resistant
(F) Catalase-positive, coagulase-negative, novobiocin-sensitive
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