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Microbiology
Which of the following is a characteristic feature on culture of Streptococcus pneumoniae organism?
Alpha-hemolytic colonies inhibited by optochin on blood agar and lysed by bile
Beta-hemolytic colonies that are bacitracin-resistant on blood agar
Beta-hemolytic colonies that are inhibited by bacitracin on blood agar
Catalase-negative organisms that hydrolyze esculin in 40% bile and 6.5% NaCI
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