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O’Connor JA, O’Reilly B, Corcoran GD, O’Mahony J, Lucey B. A comparison of the HAIN Genotype CM reverse hybridisation assay with the Bruker MicroFlex LT MALDI-TOF mass spectrometer for identification of clinically relevant mycobacterial species. Br J Biomed Sci 2020; 77:152-155. [DOI: 10.1080/09674845.2020.1732639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- JA O’Connor
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
| | - B O’Reilly
- Laboratory Medicine, Diagnostic Directorate, Cork University Hospital, Cork, Ireland
| | - GD Corcoran
- Laboratory Medicine, Diagnostic Directorate, Cork University Hospital, Cork, Ireland
| | - J O’Mahony
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
| | - B Lucey
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
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2
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Verza M, Schmid KB, Barcellos RB, Linck N, Bello GL, Scapin D, Sperhacke RD, Silva MSN, Wollheim C, Rivero MGC, Kritski AL, Rezende L, Oliveira MM, Costa ERD, Rossetti MLR. Performance of a molecular assay to detect Mycobacterium tuberculosis complex DNA in clinical specimens: multicenter study in Brazil. Mem Inst Oswaldo Cruz 2017; 112:94-99. [PMID: 28177043 PMCID: PMC5293118 DOI: 10.1590/0074-02760160196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 10/31/2016] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND In high tuberculosis (TB) burden countries, there are few data on the performance of new molecular commercialised assays developed locally. OBJECTIVE To evaluate the performance of a new molecular commercialised assay for TB diagnosis (Detect-TB) in three laboratories. METHODS A total of 302 sputum samples from an equal number of patients with presumptive diagnosis of pulmonary tuberculosis (PTB) were submitted for routine smear microscopy, culture, and Detect-TB assay at three different sites in Brazil (the cities of Caxias do Sul, São Paulo and Canoas). FINDINGS Seventy four (24.7%) TB cases were diagnosed (65 bacteriologically confirmed). When compared to smear microscopy/culture results, the overall sensitivity and specificity of Detect-TB assay was 84.6% (CI 95%; 73.7-91.6) and 93.1% (CI 95%; 89.1-95.8), respectively. When compared to bacteriological and clinical diagnostic criteria, the sensitivity and specificity of Detect-TB assay was 74.3% (CI 95%; 63.3-82.9) and 92.9% (CI 95%; 88.7-95.6), respectively. Among the three sites - Caxias do Sul, São Paulo and Canoas - the sensitivity and specificity were respectively 94.7% and 97.8%; 71.4% and 93.9%, 82.1% and 88.9%. MAIN CONCLUSIONS These findings suggest that the Detect-TB assay could be applied routinely in reference laboratories across different regions in Brazil.
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Affiliation(s)
- Mirela Verza
- Centro de Desenvolvimento Científico e Tecnológico, Fundação Estadual de Produção e Pesquisa em Saúde, Porto Alegre, RS, Brasil
| | - Karen Barros Schmid
- Centro de Desenvolvimento Científico e Tecnológico, Fundação Estadual de Produção e Pesquisa em Saúde, Porto Alegre, RS, Brasil
| | - Regina Bones Barcellos
- Centro de Desenvolvimento Científico e Tecnológico, Fundação Estadual de Produção e Pesquisa em Saúde, Porto Alegre, RS, Brasil.,Rede Brasileira de Pesquisa em Tuberculose, Rio de Janeiro, RJ, Brasil
| | - Natali Linck
- Universidade Luterana do Brasil, Canoas, RS, Brasil
| | | | | | - Rosa Dea Sperhacke
- Universidade de Caxias do Sul, Laboratório de Pesquisa em HIV/AIDS, Caxias do Sul, RS, Brasil
| | | | - Claudia Wollheim
- Universidade de Caxias do Sul, Laboratório de Microbiologia Clínica, Caxias do Sul, RS, Brasil
| | | | - Afrânio Lineu Kritski
- Universidade Federal do Rio de Janeiro, Faculdade de Medicina, Centro de Pesquisa em Tuberculose do Hospital Universitário Clementino Fraga Filho, Laboratório de Genética e Biologia Molecular, Rio de Janeiro, RJ, Brasil.,Rede Brasileira de Pesquisa em Tuberculose, Rio de Janeiro, RJ, Brasil
| | | | - Martha Maria Oliveira
- Universidade Federal do Rio de Janeiro, Faculdade de Medicina, Centro de Pesquisa em Tuberculose do Hospital Universitário Clementino Fraga Filho, Laboratório de Genética e Biologia Molecular, Rio de Janeiro, RJ, Brasil.,Rede Brasileira de Pesquisa em Tuberculose, Rio de Janeiro, RJ, Brasil
| | - Elis Regina Dalla Costa
- Centro de Desenvolvimento Científico e Tecnológico, Fundação Estadual de Produção e Pesquisa em Saúde, Porto Alegre, RS, Brasil.,Rede Brasileira de Pesquisa em Tuberculose, Rio de Janeiro, RJ, Brasil
| | - Maria Lucia Rosa Rossetti
- Centro de Desenvolvimento Científico e Tecnológico, Fundação Estadual de Produção e Pesquisa em Saúde, Porto Alegre, RS, Brasil.,Universidade Luterana do Brasil, Canoas, RS, Brasil.,Rede Brasileira de Pesquisa em Tuberculose, Rio de Janeiro, RJ, Brasil
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3
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O'Connor JA, O'Reilly B, Corcoran GD, O'Mahony J, Lucey B. Mycobacterium diagnostics: from the primitive to the promising. Br J Biomed Sci 2015; 72:32-41. [PMID: 25906489 DOI: 10.1080/09674845.2015.11666793] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The field of clinical microbiology has been revolutionised by genomic and proteomic methods, which have facilitated more rapid diagnosis and characterisation of infection in many cases. In contrast, mycobacteriological evolution has tended to retain the traditional methods of smear microscopy for detection of acid-fast bacilli to indicate mycobacteria, along with culture, and in synergy with more modern molecular methods. Thus, efforts have been focused on reducing the time to diagnosis of infection, while increasing the amount of diagnostic information available, including more definitive speciation, and more rapid susceptibility test results. Although smear microscopy remains a mainstay for the laboratory-based diagnosis of mycobacterial infection, molecular testing has vastly reduced the time needed for identification of Mycobacterium tuberculosis in particular, when compared with traditional culture-based techniques. Molecular methods may also yield antimicrobial susceptibility results through testing for the most common resistance-inducing mutations to some of the antimicrobial agents of choice. However, the diversity of resistance mutations already characterised suggests that these currently-available molecular detection systems should be accompanied by culture-based susceptibility testing. This review compares the efficacy of microscopic, phenotypic, proteomic and genotypic methods available for mycobacterial diagnosis. The diversity of methods currently in use reflects the complexity of this area of diagnostic microbiology.
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4
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Ramis IB, Cnockaert M, Von Groll A, Mathys V, Simon A, Tortoli E, Palomino JC, Almeida da Silva PE, Vandamme P, Andre E, Martin A. Evaluation of the Speed-Oligo Mycobacteria assay for the identification of nontuberculous mycobacteria. J Med Microbiol 2015; 64:283-287. [PMID: 25596120 DOI: 10.1099/jmm.0.000025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Nontuberculous mycobacteria (NTM) causing human infectious disease have become increasingly common. Rapid and accurate identification to the species level is, therefore, critical. The Speed-Oligo Mycobacteria assay is an oligochromatographic method that was made available recently for the identification and differentiation of mycobacteria. The present study aimed to evaluate the performance of the Speed-Oligo Mycobacteria assay for the identification of NTM. We examined a total of 62 strains (9 type strains, 19 reference strains and 34 clinical isolates) belonging to 13 different species (Mycobacterium intracellulare, M. fortuitum, M. gordonae, M. kansasii, M. marinum, M. peregrinum, M. scrofulaceum, M. abscessus, M. bovis BCG, M. chelonae, M. avium, M. malmoense and M. xenopi). The Speed-Oligo Mycobacteria assay was performed according to the manufacturer's instructions. Discrepant results between Speed-Oligo Mycobacteria and the original identification were reassessed by the Speed-Oligo Mycobacteria assay and resolved by the GenoType Mycobacterium CM assay and by sequencing of 16S rRNA and protein-encoding genes. We found 93.5 % (58/62) concordance for the identification of NTM as compared with the original identification. Three strains were erroneously identified by Speed-Oligo Mycobacteria: one M. kansasii strain was identified as Mycobacterium tuberculosis complex, and one M. chelonae strain and one M. peregrinum strain were both identified as Mycobacterium abscessus. Moreover, one M. chelonae strain was not identified by Speed-Oligo Mycobacteria since it did not react with any species-specific probe. For these strains, sequencing of the genes hsp65, 16S rRNA and rpoB and the GenoType Mycobacterium CM assay were performed. The Speed-Oligo Mycobacteria assay can be a useful tool for the rapid and easy identification of the most common NTM. If applied in clinical practice it could reduce diagnostic delays and contribute to correct clinical and better management of infections caused by NTM.
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Affiliation(s)
- Ivy Bastos Ramis
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, Gent, Belgium.,Centro de Desenvolvimento Tecnológico (CDTec), Universidade Federal de Pelotas, Pelotas, Brazil
| | - Margo Cnockaert
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, Gent, Belgium
| | - Andrea Von Groll
- Laboratório de Micobacteriologia, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil
| | - Vanessa Mathys
- Scientific Institute of Public Health, Brussels, WIV-ISP, Belgium
| | - Anne Simon
- Pôle de Microbiologie, Institut de Recherche Expérimentale et Clinique, UC Louvain, Brussels, Belgium
| | - Enrico Tortoli
- Emerging Bacterial Pathogens Unit, San Raffaele Scientific Institute, Milano, Italy
| | - Juan Carlos Palomino
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, Gent, Belgium
| | - Pedro Eduardo Almeida da Silva
- Laboratório de Micobacteriologia, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil.,Centro de Desenvolvimento Tecnológico (CDTec), Universidade Federal de Pelotas, Pelotas, Brazil
| | - Peter Vandamme
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, Gent, Belgium
| | - Emmanuel Andre
- Pôle de Microbiologie, Institut de Recherche Expérimentale et Clinique, UC Louvain, Brussels, Belgium
| | - Anandi Martin
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, Gent, Belgium
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5
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Lyra JMAD, Maruza M, Verza M, Carneiro MM, Albuquerque MDFMD, Rossetti ML, Ximenes R, Braga MC, Lucena-Silva N. Evaluation of four molecular methods for the diagnosis of tuberculosis in pulmonary and blood samples from immunocompromised patients. Mem Inst Oswaldo Cruz 2014; 109:805-13. [PMID: 25317709 PMCID: PMC4238774 DOI: 10.1590/0074-0276130542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 06/20/2014] [Indexed: 11/21/2022] Open
Abstract
The present study analysed the concordance among four different molecular diagnostic
methods for tuberculosis (TB) in pulmonary and blood samples from immunocompromised
patients. A total of 165 blood and 194 sputum samples were collected from 181 human
immunodeficiency virus (HIV)-infected patients with upper respiratory complaints,
regardless of suspicious for TB. The samples were submitted for smear microscopy,
culture and molecular tests: a laboratory-developed conventional polymerase chain
reaction (PCR) and real-time quantitative PCR (qPCR) and the Gen-Probe and Detect-TB
Ampligenix kits. The samples were handled blindly by all the technicians involved,
from sample processing to results analysis. For sputum, the sensitivity and
specificity were 100% and 96.7% for qPCR, 81.8% and 94.5% for Gen-Probe and 100% and
66.3% for Detect-TB, respectively. qPCR presented the best concordance with sputum
culture [kappa (k) = 0.864)], followed by Gen-Probe (k = 0.682). For blood samples,
qPCR showed 100% sensitivity and 92.3% specificity, with a substantial correlation
with sputum culture (k = 0.754) and with the qPCR results obtained from sputum of the
corresponding patient (k = 0.630). Conventional PCR demonstrated the worst results
for sputa and blood, with a sensitivity of 100% vs. 88.9% and a specificity of 46.3%
vs. 32%, respectively. Commercial or laboratory-developed molecular assays can
overcome the difficulties in the diagnosis of TB in paucibacillary patients using
conventional methods available in most laboratories.
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Affiliation(s)
| | - Magda Maruza
- Hospital Correia Picanço, Secretaria do Estado de Pernambuco, Recife, PE, Brasil
| | - Mirela Verza
- Fundação Estadual de Produção e Pesquisa em Saúde, Porto Alegre, RS, Brasil
| | | | | | | | - Ricardo Ximenes
- Departamento de Medicina Tropical, Universidade Federal de Pernambuco, Recife, PE, Brasil
| | - Maria Cynthia Braga
- Departamento de Parasitologia, Centro de Pesquisas Aggeu Magalhães-Fiocruz, Recife, PE, Brasil
| | - Norma Lucena-Silva
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães-Fiocruz, Recife, PE, Brasil
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A multicenter clinical evaluation of Mycobacterium tuberculosis IgG/IgM antibody detection using the colloidal gold method. Eur J Clin Microbiol Infect Dis 2014; 33:1989-94. [PMID: 24913311 PMCID: PMC4555362 DOI: 10.1007/s10096-014-2150-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/30/2014] [Indexed: 11/03/2022]
Abstract
A specific immunoassay method with the colloidal gold labeling technique has been developed more and more for tuberculosis (TB) diagnosis. The aim of this multicenter clinical evaluation was to evaluate the performance of a new serological diagnostic kit (the Trustline TB IgG/IgM Rapid Test kit) for the detection of Mycobacterium tuberculosis infection in China, with the Aupu TB Ab (IgG) Colloidal Gold Test kit being used as a control. A total of 1,009 specimens were collected from three TB hospitals, including 628 patients with TB, and 219 non-TB and 162 healthy patients as negative controls. According to the clinical diagnostic results, the sensitivities of the Trustline kit and the Aupu kit were 61.3 % and 53.7 %, respectively. Using the bacteriological test results as the "gold standard" to compare the results of the two kits, the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and Youden index (YI) were 77.60 %, 79.8 %, 73.31 %, 81.50 %, and 0.574 by the Trustline kit, and 67.86 %, 88.9 %, 83.27 %, 77.40 %, and 0.568 by the Aupu kit, respectively. Further, the sensitivity of the Trustline kit and the Aupu kit for the smear staining and the bacterial culture being positive was 75.6 %, 76.6 % and 65.6 %, 66.5 %, and for the negative result, it was 53.8 %, 50.9 % and 47.5 %, 45.0 %, respectively. Additionally, 35 specimens were IgM-positive by the Trustline kit; of these, 30 (4.8 %) were from patients with TB and 5 (1.3 %) were from individuals without TB. The results showed that the experimental test had a much higher sensitivity than the other commercial test and exhibited a good detection rate for M. tuberculosis infection. Therefore, this kit can be used in the supplementary diagnosis and screening of TB.
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