Multiple choice

Which of the following sets represents catalase-positive bacteria only?

  1. Enterobacter, Klebsiella, Nocardia, Staphylococcus

  2. Enterococcus, Klebsiella, Nocardia, Streptococcus

  3. Enterobacter, Enterococcus, Staphylococcus, Streptococcus

  4. Enterococcus, Klebsiella, Nocardia, Staphylococcus

  5. Klebsiella, Nocardia, Staphylococcus, Streptococcus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Catalase Test: The catalase test is done by placing a drop of hydrogen peroxide on a microscope slide. If the bacteria possess catalase, when a small amount of bacterial isolate is added to hydrogen peroxide, bubbles of oxygen are observed. If the mixture produces bubbles or froth, the organism is said to be 'catalase-positive' otherwise it is 'catalase-negative’. Enterobacter, Klebsiella, Nocardia, and Staphylococcus: All are catalase-positive bacteria.

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