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Título:
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Manual MGIT system for the detection of Mycobacterium tuberculosis: insights from a high TB burden setting
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Autores:
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Quispe, R. ;
Valle, G. A. ;
Huapaya, J. A. ;
Novoa, I. ;
Giraldo, J. ;
Cáceres, T. ;
Gotuzzo, E. ;
Zamudio, C. ;
Seas, C.
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Tipo de documento:
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texto impreso
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Editorial:
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International Union Against Tuberculosis and Lung Disease, 2019-02-06T14:45:58Z
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Nota general:
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info:eu-repo/semantics/restrictedAccess
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
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Idiomas:
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Inglés
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Palabras clave:
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Editados por otras instituciones
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Artículos
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Artículos en revistas indizadas
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Resumen:
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OBJECTIVE: To evaluate the diagnostic performance of manual MGIT (MMGIT) compared to the gold standard, Lowenstein-Jensen (LJ), in the diagnosis of pulmonary tuberculosis (TB) in a high-burden setting. METHODS: Individuals with suspected TB enrolled in parallel diagnostic trials during 2007-2011 were included. Two samples were obtained from each patient and inoculated into MMGIT and LJ medium. Diagnostic tests were performed, and the incremental yield of a second test and time to detection (TTD) were calculated. Analyses were performed per patient and per sample. Gold standard was based on LJ culture. RESULTS: In the per patient and per sample analysis, we evaluated 1436 patients and 4142 samples. The sensitivity and specificity for smear and MMGIT per sample were respectively 89.9%/92.2% and 97.1%/98.9%. Contamination was observed in 1.4% of samples on MMGIT. The mean TTD (days) was 11.8 for MMGIT and 22.9 for LJ. The sensitivity and specificity for smear and MMGIT per patient were respectively 89.9% and 92.2% and 97.1% and 98.3%. A second MMGIT culture had an incremental yield of 1.6%. CONCLUSIONS: MMGIT has high sensitivity and specificity, regardless of smear result, with a 50% reduction in TTD compared to LJ. These features make MMGIT an acceptable TB diagnostic method for use in resource-limited settings.
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En línea:
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http://doi.org/10.5588/ijtld.15.0489
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