14d • Multiple choice answers
🧪 Answer Reveal: Recall Poll Question
Which characteristic best differentiates Bacillus anthracis from other Bacillus species?
✅ Correct Answer: C) Non-motility
👏 Thanks to everyone who voted! 🎉
🧠 Explanation:
One of the most important laboratory features used to distinguish Bacillus anthracis from other Bacillus species is that it is:
✔ Non-motile
Most other clinically important Bacillus species (such as Bacillus cereus) are motile, making motility a high-yield differentiating test.
🔬 Why not the other options?
A) Spore formation ❌
• Most Bacillus species form spores, so this does not distinguish B. anthracis.
B) Gram-positive rods ❌
• This describes the entire Bacillus genus, not just B. anthracis.
D) Catalase positivity ❌
• Most Bacillus species are catalase positive.
💡 Quick Recall Tip:
🦠 Anthrax = “Anchored” = Doesn’t Move
👉 Bacillus anthracis = Non-motile
👉 Bacillus cereus = Motile
🔥 High-Yield ASCP Clue:
If you’re comparing B. anthracis and B. cereus, remember:
✔ Both are Gram-positive, spore-forming rods.
✔ Both are catalase positive.
⭐ Motility is one of the easiest ways to tell them apart.
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🧪 Answer Reveal: Recall Poll Question
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