🧪 Answer Reveal: Quick Recall Question
Question: Which test helps differentiate Enterococcus from non-enterococcus Group D strep?
✅ Correct Answer: B) PYR
🧠 Explanation:
Enterococcus species are:
✔ PYR positive
✔ Usually grow in 6.5% NaCl broth
Non-enterococcus Group D streptococci (like Streptococcus bovis/gallolyticus) are typically:
❌ PYR negative
❌ Do not grow well in 6.5% NaCl
This makes the PYR test a very important quick differentiation tool in the lab 🔬
🔬 Why not the other options?
A) Catalase ❌
• Used to differentiate Staphylococcus from Streptococcus
C) Coagulase ❌
• Used to identify Staphylococcus aureus
D) Oxidase ❌
• Mainly used for Gram-negative organisms
💡 Quick Recall Tip:
🔥 Enterococcus = PYR positive
👉 Think:Enterococcus faecalis → PYR positive + grows in 6.5% NaCl
👇 Did you get it right? Drop a 🧫 or 🔥 below!
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🧪 Answer Reveal: Quick Recall Question
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