ID#: 19332
Caption:
Depicted here, were the results of what is referred to as an optochin (ethylhydrocupreine) test, used to confirm the presence of Streptococcus pneumoniae bacteria, which are optochin-sensitive. In so doing, S. pneumoniae can then be differentiated from other alpha-hemolytic streptococcal organisms, such as S. viridans, which are optochin-resistant. The results, revealed that optochin-sensitive, S. pneumoniae, were present on the left, given the zone of inhibition around the optochin imbibed disc, while the optochin-resistant bacteria on the right grew uninhibitedly up to the disc’s edge.
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Content Provider(s): CDC/ Dr. Richard Facklam
Creation Date: 1981
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