ZN smear (without centrifugation) | N | % |
AFB positive | 51 | 17 |
1-9/100 field | 0 | 0 |
1+ | 28 | 9.3 |
2+ | 14 | 4.7 |
3+ | 9 | 3.0 |
AFB negative | 249 | 83.0 |