Microbiology Flashcards

What is the shape and Gram status of Escherichia coli?

Rod-shaped and Gram-negative (-).

Which microorganisms are catalase-positive?

Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa, and Neisseria subflava.

Which microorganisms are Gram-positive cocci?

Staphylococcus aureus and Staphylococcus epidermidis.

What does 'AG' mean in the glucose fermentation column?

Acid and gas production during glucose fermentation.

Which microorganism produces an alkaline (K) reaction in the TSIA test?

Pseudomonas aeruginosa.

Which microorganism is oxidase-positive?

Neisseria subflava and P.aeruginosa

Which microorganism does not ferment lactose?

Proteus vulgaris and Pseudomonas aeruginosa.

What type of reaction does Staphylococcus aureus show in the MSA test?

Positive reaction.

Which microorganisms are urease-negative?

Escherichia coli and Pseudomonas aeruginosa.

What shape and Gram status are Neisseria subflava?

Coccus-shaped and Gram-negative (-).

What does 'K/A/G' in the TSIA test mean?

Alkaline slant, acid butt, and gas production.

Which microorganism ferments both glucose and lactose?

Escherichia coli and Enterobacter aerogenes.

Which microorganism is a Gram-negative rod and does not produce gas in glucose fermentation?

Pseudomonas aeruginosa.

Which microorganism shows 'NC' (no change) for lactose fermentation?

Proteus vulgaris and Pseudomonas aeruginosa.