Part F From your first day of observations, your unknowm bacteria appear to be g

Question

Part F From your first day of observations, your unknowm bacteria appear to be gram-positive cocci that produce yellowfgolden growth onTSA Based on these first few observations, and the ID matrix below. the unknown is either Micrococcus luteus or Staphylocc NOT distinguish these two species? ID Matrix organism Bacillus cereus Enterobacter aerogenes Escherichia coli Micrococcus luteus Proteus vulgaris Pseudomonas aeruginosa Staphylococcus aureus Growth on TSA White, moist, glistening White, moist, glistening Translucent oft-white White. with medium turning green Smooth, yellow Morphology Glucose AG Fermentation Variable Variable Sucrose Variable Methyl Red Variable Variable Voges-Proskauer Glucose fermentation o Urease Indole O Methyl red Hints MyAnswers Give up Review Part Submit

Explanation / Answer

PART E-

TSA growth, indole, and methyl red are used to distinguish between E.coli and P. aeruginosa.

PART F-

methyl red is used to distinguish between M. luteus and S. aureus.

PART D -

in lactose fermentation (middle tube) a small gas bubble is present in the small tube present in the media. only E. coli from the above option is producing acid and Gas in lactose fermentation. so organism is E. coli.

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