question
MacConkey Agar
answer
Selects for gram-negative bacteria and shows if they ferment lactose
question
Catalase
answer
presence of catalase enzyme
question
Positive catalase test result
answer
hydrogen peroxide mixed with bacteria produces bubbles
question
MAC results: no growth
answer
Gram positive
question
MAC results: good growth
answer
Gram negative
question
MAC results: pink to red growth
answer
lactose was fermented; possible coliform
question
MAC results: colorless growth
answer
noncoliform; does not ferment lactose
question
...
answer
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