Optochin test

This test is used to differentiate alpha -hemolytic (viridizing) streptococci. It allows us to distinguish Streptococcus pneumoniae from the group of  oral streptococci.


 * Principle:
 * Optochin-sensitive bacteria do not grow around the disk, as the optochin diffuses from the disk into the environment, preventinf them from growing. An inhibition zone is created.


 * Result
 * Streptococcus pneumoniae is sensitive to optochin – it does not grow around the disk.

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