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Table 5 Comparison of ZN and CS methods for detection and grading of AFB in morning sputum specimens

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

ZN; no. (%)/24
  Grade 3+ 2+ 1+ Scanty Negative Total
  3+ 7(1.9) 0(0) 0(0) 0(0) 0(0) 7(1.9)
  2+ 1(0.3) 7(1.9) 2(0.6) 0(0) 0(0) 10(2.8)
CS/23 1+ 1(0.3) 0(0) 4(1.1) 0(0) 0(0) 5(1.4)
  Scanty 0(0) 0(0) 0(0) 1(0.3) 0(0) 1(0.3)
  Negative 0(0) 0(0) 0(0) 1(0.3) 338(93.4) 339(93.6)
  Total 9(2.5) 7(1.9) 6(1.7) 2(0.6) 338(93.4) 362(100)