Learn Ziehl-Neelsen (ZN) staining, the cornerstone technique for detecting acid-fast bacilli (AFB) like Mycobacterium tuberculosis. This definitive guide covers:
✓ Carbol fuchsin & acid-alcohol principle
✓ Step-by-step protocol for sputum/tissue samples
✓ Interpretation: AFB grading system (1+ to 4+)
✓ Key differences from Kinyoun & Auramine-Rhodamine stains
✓ Modern applications in TB diagnosis and drug resistance testing
Essential for microbiologists, TB lab technicians, and pathology residents in high-burden settings.
Challenge your TB diagnostics knowledge with 30+ ZN staining MCQs:
◼️ Decoding AFB smear results (scanty vs. 3+)
◼️ Identifying Nocardia vs. Mycobacterium
◼️ Troubleshooting over-decolorization
◼️ WHO-recommended quality control measures
Crucial for MLT certification, public health exams, and MDR-TB programs.
Read Full Article: Ziehl-Neelsen Staining 50 FAQ and 30 MCQs






