A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens.
<h4>Unlabelled</h4>Rifampicin (R) and isoniazid (H) are key first-line anti-tuberculosis drugs. Failure to detect resistance to these two drugs early results in treatment failure and poor clinical outcomes. The study purpose was to validate the use of the GenoType MTBDRplus line probe as...
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| Language: | English |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0088626 |
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| author | Neeraj Raizada K S Sachdeva D S Chauhan Bharti Malhotra Kishore Reddy P V Dave Yamuna Mundade Pranav Patel Ranjani Ramachandran Ram Das Rajesh Solanki Douglas Fraser Wares Suvanand Sahu Rick O'Brien C N Paramasivan Puneet K Dewan |
| author_facet | Neeraj Raizada K S Sachdeva D S Chauhan Bharti Malhotra Kishore Reddy P V Dave Yamuna Mundade Pranav Patel Ranjani Ramachandran Ram Das Rajesh Solanki Douglas Fraser Wares Suvanand Sahu Rick O'Brien C N Paramasivan Puneet K Dewan |
| author_sort | Neeraj Raizada |
| collection | DOAJ |
| description | <h4>Unlabelled</h4>Rifampicin (R) and isoniazid (H) are key first-line anti-tuberculosis drugs. Failure to detect resistance to these two drugs early results in treatment failure and poor clinical outcomes. The study purpose was to validate the use of the GenoType MTBDRplus line probe assay (LPA) to detect resistance to R and H in Mycobacterium tuberculosis strains directly from smear-positive sputum samples in India.<h4>Method</h4>Smear positive sputum specimens from 320 patients were subjected to LPA and results compared against those from conventional Lowenstein Jensen (LJ) culture and drug susceptibility testing (C&DST). All specimens with discordant R DST results were subjected to either sequencing of the rpoB gene and/or repeat DST on liquid culture (MGIT 960) at a National Reference Laboratory.<h4>Results</h4>Significantly higher proportion of interpretable results were observed with LPA compared to LJ C&DST (94% vs. 80%, p-value <0.01). A total of 248 patients had both LJ and LPA DST results available; 232 (93.5%) had concordant R DST results. Among the 16 discordant R DST results, 13 (81%) were resolved in agreement with LPA results. Final LPA performance characteristics were sensitivity 96% (CI: 90%-98%), specificity 99% (CI: 95%-99%), positive predictive value 99% (CI: 95%-99%), and negative predictive value 95% (CI: 89%-98%). The median turnaround testing time, including specimen transportation time, on LPA was 11 days as compared with 89 days for LJ C&DST.<h4>Conclusions</h4>LPA proved highly accurate in the rapid detection of R resistance. The reduction in time to diagnosis may potentially enable earlier commencement of the appropriate drug therapy, leading to some reduction of transmission of drug-resistant strains. |
| format | Article |
| id | doaj-art-86360e02d5604499b5d7516c94e1dfc5 |
| institution | DOAJ |
| issn | 1932-6203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj-art-86360e02d5604499b5d7516c94e1dfc52025-08-20T03:10:47ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0192e8862610.1371/journal.pone.0088626A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens.Neeraj RaizadaK S SachdevaD S ChauhanBharti MalhotraKishore ReddyP V DaveYamuna MundadePranav PatelRanjani RamachandranRam DasRajesh SolankiDouglas Fraser WaresSuvanand SahuRick O'BrienC N ParamasivanPuneet K Dewan<h4>Unlabelled</h4>Rifampicin (R) and isoniazid (H) are key first-line anti-tuberculosis drugs. Failure to detect resistance to these two drugs early results in treatment failure and poor clinical outcomes. The study purpose was to validate the use of the GenoType MTBDRplus line probe assay (LPA) to detect resistance to R and H in Mycobacterium tuberculosis strains directly from smear-positive sputum samples in India.<h4>Method</h4>Smear positive sputum specimens from 320 patients were subjected to LPA and results compared against those from conventional Lowenstein Jensen (LJ) culture and drug susceptibility testing (C&DST). All specimens with discordant R DST results were subjected to either sequencing of the rpoB gene and/or repeat DST on liquid culture (MGIT 960) at a National Reference Laboratory.<h4>Results</h4>Significantly higher proportion of interpretable results were observed with LPA compared to LJ C&DST (94% vs. 80%, p-value <0.01). A total of 248 patients had both LJ and LPA DST results available; 232 (93.5%) had concordant R DST results. Among the 16 discordant R DST results, 13 (81%) were resolved in agreement with LPA results. Final LPA performance characteristics were sensitivity 96% (CI: 90%-98%), specificity 99% (CI: 95%-99%), positive predictive value 99% (CI: 95%-99%), and negative predictive value 95% (CI: 89%-98%). The median turnaround testing time, including specimen transportation time, on LPA was 11 days as compared with 89 days for LJ C&DST.<h4>Conclusions</h4>LPA proved highly accurate in the rapid detection of R resistance. The reduction in time to diagnosis may potentially enable earlier commencement of the appropriate drug therapy, leading to some reduction of transmission of drug-resistant strains.https://doi.org/10.1371/journal.pone.0088626 |
| spellingShingle | Neeraj Raizada K S Sachdeva D S Chauhan Bharti Malhotra Kishore Reddy P V Dave Yamuna Mundade Pranav Patel Ranjani Ramachandran Ram Das Rajesh Solanki Douglas Fraser Wares Suvanand Sahu Rick O'Brien C N Paramasivan Puneet K Dewan A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens. PLoS ONE |
| title | A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens. |
| title_full | A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens. |
| title_fullStr | A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens. |
| title_full_unstemmed | A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens. |
| title_short | A multi-site validation in India of the line probe assay for the rapid diagnosis of multi-drug resistant tuberculosis directly from sputum specimens. |
| title_sort | multi site validation in india of the line probe assay for the rapid diagnosis of multi drug resistant tuberculosis directly from sputum specimens |
| url | https://doi.org/10.1371/journal.pone.0088626 |
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