Staph aureus can be differentiate from strepto pyogenes because it:
- a- Contain Catalase enzyme***
- b- Contain Coagulase enzyme
- c- Contain urease enzyme
- d- Contain Citrate enzyme.
The correct answer is: b- Contain Coagulase enzyme.
Here's why:
- Catalase enzyme:
Both Staph aureus and Strep pyogenes can produce catalase, so this is not a reliable differentiator.
- Coagulase enzyme:
Only Staph aureus produces coagulase, which enables it to clot blood plasma. This is a key distinction between the two bacteria.
- Urease enzyme:
Not all Staph aureus strains produce urease, so this is not a consistent way to differentiate them.
- Citrate enzyme:
Strep pyogenes can also utilize citrate, so this is not a specific marker for Staph aureus.
Therefore, the presence of coagulase enzyme is the most definitive way to distinguish Staph aureus from Strep pyogenes in a laboratory setting.
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