The organism is Legionella pneumophila, a weakly gram-negative rod causing pneumonia in smokers, requiring cysteine and iron for growth (Charcoal Yeast Extract Agar) and visualized with silver stain. It belongs to the cysteine-requiring 'ELLA' group with Francisella, Brucella, and Pasteurella.
The organism described is Legionella pneumophila, a weakly gram-negative rod causing pneumonia, often found in smokers. It requires cysteine and iron for growth on Charcoal Yeast Extract Agar and is visualized with silver stain. Legionella is part of the 'ELLA' group requiring cysteine, along with Francisella, Brucella, and Pasteurella.
| Front | Identify the organism and its growth requiremements Previous smoker Dry cough Chest pain Weakly gram (-) |
|---|---|
| Back | ↓ Charcoal Yeast Extract Agar Cysteine + Iron Silver stain **Legionella is one of the 4 sisters ELLA that worship in the CYSTEINE chapel FrancisELLA | BrucELLA | PasteurELLA | LegionELLA |
Tags: microbiology
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