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Sensitivities of AFB microscopy methods w low-CFU versus high-CFU cultures of first sputum specimens
| Method | % Sensitivity (95% CI) |
|
|---|---|---|
| Low CFUa | High CFUb | |
| Direct sputum smear microscopy | 19 (7, 43) | 80 (61, 91) |
| Centrifuged sputum smear FM | 32 (19, 49) | 80 (66, 89) |
| SMF Kinyoun stain LM | 73 (56, 85) | 100 |
| SMF auramine stain FM | 73 (56, 85) | 100 |
Low, 1 to 200 CFU; n = 34.
High, >200 CFU; n = 49.
