Comparison of Two Nucleic Acid Amplification Assays, the Xpert MTB/RIF Assay and the Amplified Mycobacterium Tuberculosis Direct Assay, for Detection of Mycobacterium tuberculosis in Respiratory and Nonrespiratory Specimens
We compared the performance of the Xpert MTB/RIF assay, a new real-time tuberculosis (TB) PCR test, with that of the Amplified Mycobacterium Tuberculosis Direct (MTD) assay using 162 respiratory and nonrespiratory specimens. Based on culture as the gold standard, the overall sensitivity and specificity for all sample types for the Xpert MTB/RIF assay were 90.9 and 89%, respectively, while for the MTD assay, the overall sensitivity and specificity were 97.3 and 87.1%, respectively. A higher proportion of total equivocal results were obtained for the MTD assay, at 10.5% (17/162), while the Xpert MTB/RIF assay generated 5.5% (9/162) of invalid reads.
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Univ Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South AfricaUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Badal-Faesen, Sharlaa
Firnhaber, Cynthia
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Univ Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South AfricaUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Firnhaber, Cynthia
Kendall, Michelle A.
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Harvard TH Chan Sch Publ Hlth Boston, Ctr Biostat AIDS Res, Boston, MA 02115 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Kendall, Michelle A.
Wu, Xingye
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Harvard TH Chan Sch Publ Hlth Boston, Ctr Biostat AIDS Res, Boston, MA 02115 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Wu, Xingye
Grinsztejn, Beatriz
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INI Fiocruz, Inst Nacl Infectol Evandro Chagas, BR-21045900 Rio De Janeiro, BrazilUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Grinsztejn, Beatriz
da Silva Escada, Rodrigo Otavio
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INI Fiocruz, Inst Nacl Infectol Evandro Chagas, BR-21045900 Rio De Janeiro, BrazilUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
da Silva Escada, Rodrigo Otavio
Fernandez, Michel
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Baylor Scott & White Hosp, Pulm & Crit Care Dept, Temple, TX 76508 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Fernandez, Michel
Hogg, Evelyn
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Social & Sci Syst Inc, Silver Spring, MD 20910 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Hogg, Evelyn
Sanne, Ian
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Univ Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South AfricaUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Sanne, Ian
Johnson, Pamela
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Cepheid Inc, Sunnyvale, CA 94089 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Johnson, Pamela
Alland, David
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Rutgers New Jersey Med Sch, Div Infect Dis, 185 South Orange Ave, Newark, NJ 07103 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Alland, David
Mazurek, Gerald H.
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Ctr Dis Control & Prevent, Div TB Eliminat, Atlanta, GA 30333 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Mazurek, Gerald H.
Benator, Debra A.
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George Washington Univ, Vet Affairs Med Ctr, Washington, DC 20422 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
Benator, Debra A.
Luetkemeyer, Anne F.
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Univ Calif San Francisco, Zuckerberg San Francisco Gen, Div HIV Infect Dis & Global Med, San Francisco, CA 94110 USAUniv Witwatersrand, Fac Hlth Sci, Sch Clin Med, Dept Internal Med,Clin HIV Res Unit, ZA-2092 Johannesburg, South Africa
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Univ Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, IndonesiaUniv Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, Indonesia
Andriani, R.
Burhan, E.
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Univ Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, IndonesiaUniv Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, Indonesia
Burhan, E.
Isbaniah, F.
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Univ Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, IndonesiaUniv Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, Indonesia
Isbaniah, F.
Asri, S. D. Atas
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Univ Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, IndonesiaUniv Indonesia, Dept Pulmonol & Respiratoy Med, Fac Med, Jakarta, Indonesia