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What is Streptococcus pyogenes can be checked by which drug disk and explain in detail?
Ans. (a) BacitracinRef.: Microbiology by Ananthanarayan and Paniker 8th ed. /201, 206-07, 2012* The various species of Streptococcus can be checked by various drug disks which is indicated as whether it is sensitive or resistant to the drug.* S. pyogenes is bacitracin sensitive.* S. agalactiae is bacitracin resistant.* S. pneumoniae is inhibited by optochin.* S. viridans is not inhibited by optochin.