Specimen

Number

Positive by conventional ZN staining

Positive on bleach concentration method

Pooled samples

16 (14.28%)

32 (28.57%)

sputum

112

Morning samples

13 (11.60%)

47 (41.96%)

Gastric aspirate

5

0

2 (40%)

E T Tube

2

0

2 (100%)

Bronchial lavage (BAL)

12

1 (8.33%)

5 (41.66%)

Total

131 patients

17 (16 + 1)

56 (47 + 2 + 2 + 5)