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Table 6 Comparison of ZN and CS methods for detection and grading of AFB in second-spot sputum specimens

From: Comparative evaluation of a two-reagent cold stain method with Ziehl-Nelseen method for pulmonary tuberculosis diagnosis

ZN; no. (%)/23

 

Grade

3+

2+

1+

Scanty

Negative

Total

 

3+

5(1.4)

1(0.3)

0(0)

0(0)

0(0)

6(1.7)

 

2+

2(0.6)

7(1.9)

0(0)

0(0)

0(0)

9(2.5)

CS/23

1+

0(0)

2(0.6)

5(1.4)

0(0)

0(0)

7(1.9)

 

Scanty

0(0)

0(0)

0(0)

1(0.3)

0(0)

1(0.3)

 

Negative

0(0)

0(0)

0(0)

0(0)

339(93.6)

339(93.6)

 

Total

7(1.9)

10(2.8)

5(1.4)

1(0.3)

339(93.6)

362(100)