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