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3 Apr 2018

Does bacillus cereus grow on crystal violet agar, sodium chloride agar, mannitol salt agar, and macconkeys agar?

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Related questions

You plate a sample containing two different bacterial species onto MacConkey agar and Mannitol Salt Agar plates. Nothing grows on the Mannitol Salt Agar. One colony type grows up on the MacConkey plate. It is pink in color. What can you conclude about your two mystery bacteria (explain how you arrived at your conclusions)? What media would you use next to isolate the second species and why did you pick that media?

Compare the recipes of nutrient agar and HE agar. If an organism can grow on both media, on which would you expect it to grow better? Why?

HE Yeast extract Peptic digest of animal tissue lactose sucrose salicin bile salts NaCl Sodium thiosulfate Ferric ammonium citrate Bromthymol blue Acid fuchsin Agar D.I. water Nutrient Agar Beef extract Peptone Agar D.I. Water

a) What is the purpose of the high sodium chloride content in this medium (MSA)?

b) Mannitol salt agar is used to isolate and differentiate one organism specifically. What genus and species name of this organism?

c) Why does the medium change color for some organism?

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