Vishnu PH, Bhat P, Bansal A, Satyanarayana S, Alavadi U, Ohri BS, Shrinivas MSR, Desikan P, Jaju J, Rao VG, Moonan PK. Is bleach-sedimented smear microscopy an alternative to direct microscopy under programme conditions in India?
Public Health Action 2015;
3:23-5. [PMID:
26392991 DOI:
10.5588/pha.12.0100]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Accepted: 02/14/2013] [Indexed: 11/10/2022] Open
Abstract
This cross-sectional multi-centric study compared the yield of and potential benefit for detecting smear-positive pulmonary tuberculosis (PTB) by bleach sedimentation (2% sodium-hypochlorite) versus direct microscopy under programme conditions in India. Among 3168 PTB suspects, 684 (21.6%) were detected by bleach sedimentation vs. 625 (19.7%) by direct microscopy, with a proportional overall agreement of 96% (κ = 0.88). While 594 patients were smear-positive with both methods, 31 patients detected by direct microscopy were missed and an additional 90 patients were detected by bleach sedimentation. Overall, bleach sedimentation increased the yield of smear-positive TB detection; however; it also increased the time to results.
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