Optochin test

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The Optochin test is carried out by placing paper flakes (6–10 mm Ø) soaked in ethyl hydrocuprein (1: 4000), also Optochin, on a solid nutrient medium ( blood agar ) and is used to detect pneumococci whose growth occurs in a zone of inhibition around the platelet is suppressed. In contrast to Viridans streptococci , pneumococci are inhibited in their growth.

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  1. ^ Roche Lexicon Medicine, 5th edition.