Smear grading by AFB direct smear | No. of samples | Average days of positivity by MGIT and LJ Medium Average day of positivity | |
By MGIT (average days) | By LJ media (average days) | ||
Negative | 11 | 20 days | 37 days |
Scanty | 9 | 16 days | 32 days |
1 | 11 | 14 days | 30 days |
2 | 12 | 13 days | 26 days |
3 | 5 | 13 days | 25 days |