Discussion
All of the following are the characteristics of Streptococcus pneumoniae, EXCEPT?
Answer: D
Correct answer: It grows well in a high concentration of glucose media
Pneumococci are fastidious and are inhibited rather than favoured by a high glucose concentration, because the acid produced from fermenting it lowers the pH below what the organism tolerates. The other three are all correct: it is a capsulated diplococcus, it is alpha-haemolytic on blood agar, and it is carried in the nasopharynx of healthy people.
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