Which Phenotypic Assay Could Be Used to Determine Whether a New

question 53

Multiple Choice

Which phenotypic assay could be used to determine whether a new Streptococcus spp. is of the pyogenes or viridans group?

• A) catalase assay with H₂O₂
• B) hemolytic type after growth on a blood agar plate
• C) occurrence of cells being in clusters or as individual cells under a microscope
• D) product(s) formed during lactose fermentation

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