Abstract
Background: Microscopy detection of acid-fast bacilli (AFB) by Ziehl-Neelsen (ZN) method is a rapid and feasible method but has low sensitivity. Aims: To evaluate the efficacy of bleach method with cytological diagnosis and the conventional method. Methods: Five hundred and seventy-five patients with tubercular lymphadenitis were evaluated. The acid-fast positivity by routine staining was compared with modified bleach method of AFB staining. Result: Among 575 patients, 230 (40%) were positive for AFB on conventional ZN method, 310 (53.9%) on cytology and the smear positivity was increased to 365 (63.5%) by bleach method. Conclusion: The bleach method is simple and inexpensive. It clearly improves microscopic detection of AFB.
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