<prompt> Which is false regarding Gram positive cocci ?Staph. saprophyticus causes UTI in femalesMicrococci are oxidase positiveMost enterococci are sensitive to penicillinPneumococci are capsulated  <response>: Unlike streptococci enterococci are not reliably killed by penicillin or ampicillin alone at concentration acheived clinically in the blood or tissues.Antimicrobial susceptibility testing should be performed routinely on enterococcal isolates.Other optionsOption a Staph. saprophyiticus specially causes UTI in sexually active young women.Option b Micrococci are catalase and oxidase positive Gr ve cocci. They are strict aerobes and are non pathogenic.Micrococci are differentiated from Staphylococci by Hugh and deifson oxidation fermentation test in which micrococci shows oxidative pattern while staphylococci show fermentive pattern. 