Microbiology Flashcards

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Last updated 1:19 AM on 3/4/25
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14 Terms

1
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What is the shape and Gram status of Escherichia coli?
Rod-shaped and Gram-negative (-).
2
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Which microorganisms are catalase-positive?
Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa, and Neisseria subflava.
3
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Which microorganisms are Gram-positive cocci?
Staphylococcus aureus and Staphylococcus epidermidis.
4
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What does 'AG' mean in the glucose fermentation column?
Acid and gas production during glucose fermentation.
5
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Which microorganism produces an alkaline (K) reaction in the TSIA test?
Pseudomonas aeruginosa.
6
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Which microorganism is oxidase-positive?

Neisseria subflava and P.aeruginosa

7
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Which microorganism does not ferment lactose?
Proteus vulgaris and Pseudomonas aeruginosa.
8
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What type of reaction does Staphylococcus aureus show in the MSA test?
Positive reaction.
9
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Which microorganisms are urease-negative?
Escherichia coli and Pseudomonas aeruginosa.
10
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What shape and Gram status are Neisseria subflava?
Coccus-shaped and Gram-negative (-).
11
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What does 'K/A/G' in the TSIA test mean?
Alkaline slant, acid butt, and gas production.
12
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Which microorganism ferments both glucose and lactose?
Escherichia coli and Enterobacter aerogenes.
13
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Which microorganism is a Gram-negative rod and does not produce gas in glucose fermentation?
Pseudomonas aeruginosa.
14
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Which microorganism shows 'NC' (no change) for lactose fermentation?
Proteus vulgaris and Pseudomonas aeruginosa.