May 25 • Organisms of the Week!
🧫 Organism of the Week | Listeria monocytogenes
This week we’re covering an aerobic non spore-forming Gram-positive rod...
👉 Listeria monocytogenes
🧠 Key Identification Clues:
• Small Gram-positive rods
• Non–spore-forming
• Tumbling motility
• Beta-hemolytic
• Facultative intracellular organism
🔬 What makes it unique?
👉 Can grow in cold temperatures (“cold enrichment”)
👉 Shows characteristic tumbling motility
⚠️ High-Yield Clinical Associations:
• Neonatal meningitis
• Pregnant women
• Immunocompromised patients
• Contaminated deli meats/unpasteurized dairy
🧠 Think Pattern:
👉 “Pregnancy + tumbling motility + cold growth = Listeria”
💙 This organism LOVES showing up on exams 👀
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🧫 Organism of the Week | Listeria monocytogenes
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