🧪 Bench Tip | Actinomyces
One of the easiest mistakes is confusing Actinomyces with Nocardia because both appear as branching Gram-positive rods.
Here’s the shortcut:
✔️ Actinomyces = Anaerobic + Not acid-fast
✔️ Nocardia = Aerobic + Modified Acid-Fast positive
💡 When you see branching rods, always ask:
“Is it aerobic or anaerobic?”
“Is it acid-fast or not?”
Those two questions can quickly narrow your identification.
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🧪 Bench Tip | Actinomyces
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