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Title: Evaluation of Low-Colony-Number Counts of Mycobacterium tuberculosis on Solid Media as a Microbiological Marker of Cross-Contamination
Authors: Ribeiro, F. K. C.
Lemos, E. M.
Hadad, D. J.
Leao, S. C. [UNIFESP]
Viana-Niero, C. [UNIFESP]
Dietze, R.
Johnson, J. L.
Eisenach, K. D.
Palaci, M.
Univ Fed Espirito Santo
Universidade Federal de São Paulo (UNIFESP)
Case Western Reserve Univ
Univ Hosp Case Med Ctr
Univ Arkansas Med Sci
Issue Date: 1-Jun-2009
Publisher: Amer Soc Microbiology
Citation: Journal of Clinical Microbiology. Washington: Amer Soc Microbiology, v. 47, n. 6, p. 1950-1952, 2009.
Abstract: Low-colony-number counts on solid media are considered characteristic of cross-contamination, although they are normally observed in true-positive cultures from some groups of patients. the aim of this study was to evaluate low-yield growth cultures as a microbiological marker for cross-contamination. We evaluated 106 cultures with < 15 colonies from 94 patients, and the proportions of false-positive cultures were 0.9% per sample and 1.1% per patient, which indicates that low-yield growth is not a reliable marker of cross-contamination.
ISSN: 0095-1137
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