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Reta MA, Maningi NE, Fourie PB. Patterns and profiles of drug resistance-conferring mutations in Mycobacterium tuberculosis genotypes isolated from tuberculosis-suspected attendees of spiritual holy water sites in Northwest Ethiopia. Front Public Health 2024; 12:1356826. [PMID: 38566794 PMCID: PMC10985251 DOI: 10.3389/fpubh.2024.1356826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 02/26/2024] [Indexed: 04/04/2024] Open
Abstract
Purpose This study examined the patterns and frequency of genetic changes responsible for resistance to first-line (rifampicin and isoniazid), fluoroquinolones, and second-line injectable drugs in drug-resistant Mycobacterium tuberculosis (MTB) isolated from culture-positive pulmonary tuberculosis (PTB) symptomatic attendees of spiritual holy water sites (HWSs) in the Amhara region. Patients and methods From June 2019 to March 2020, a cross-sectional study was carried out. A total of 122 culture-positive MTB isolates from PTB-suspected attendees of HWSs in the Amhara region were evaluated for their drug resistance profiles, and characterized gene mutations conferring resistance to rifampicin (RIF), isoniazid (INH), fluoroquinolones (FLQs), and second-line injectable drugs (SLIDs) using GenoType®MTBDRplus VER2.0 and GenoType®MTBDRsl VER2.0. Drug-resistant MTB isolates were Spoligotyped following the manufacturer's protocol. Results Genetic changes (mutations) responsible for resistance to RIF, INH, and FLQs were identified in 15/122 (12.3%), 20/122 (16.4%), and 5/20 (25%) of MTB isolates, respectively. In RIF-resistant, rpoB/Ser531Lue (n = 12, 80%) was most frequent followed by His526Tyr (6.7%). Amongst INH-resistant isolates, katG/Ser315Thr1 (n = 19, 95%) was the most frequent. Of 15 MDR-TB, the majority (n = 12, 80%) isolates had mutations at both rpoB/Ser531Leu and katG/Ser315Thr1. All 20 INH and/or RIF-resistant isolates were tested with the MTBDRsl VER 2.0, yielding 5 FLQs-resistant isolates with gene mutations at rpoB/Ser531Lue, katG/Ser315Thr1, and gyrA/Asp94Ala genes. Of 20 Spoligotyped drug-resistant MTB isolates, the majority (n = 11, 55%) and 6 (30%) were SIT149/T3-ETH and SIT21/CAS1-Kili sublineages, respectively; and they were any INH-resistant (mono-hetero/multi-). Of 15 RIF-resistant (RR/MDR-TB) isolates, 7 were SIT149/T3-ETH, while 6 were SIT21/CAS1-Kili sublineages. FLQ resistance was detected in four SIT21/CAS1-Kili lineages. Conclusion In the current study, the most common gene mutations responsible for resistance to INH, RIF, and FLQs were identified. SIT149/T3-ETH and SIT21/CAS1-Kili constitute the majority of drug-resistant TB (DR-TB) isolates. To further understand the complete spectrum of genetic changes/mutations and related genotypes, a sequencing technology is warranted.
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Affiliation(s)
- Melese Abate Reta
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
- Department of Medical Laboratory Science, College of Health Sciences, Woldia University, Woldia, Ethiopia
| | - Nontuthuko Excellent Maningi
- Department of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Durban, South Africa
| | - P. Bernard Fourie
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
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Thapa J, Chizimu JY, Kitamura S, Akapelwa ML, Suwanthada P, Miura N, Toyting J, Nishimura T, Hasegawa N, Nishiuchi Y, Gordon SV, Nakajima C, Suzuki Y. Characterization of DNA Gyrase Activity and Elucidation of the Impact of Amino Acid Substitution in GyrA on Fluoroquinolone Resistance in Mycobacterium avium. Microbiol Spectr 2023; 11:e0508822. [PMID: 37067420 PMCID: PMC10269562 DOI: 10.1128/spectrum.05088-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/28/2023] [Indexed: 04/18/2023] Open
Abstract
Mycobacterium avium, a member of the M. avium complex (MAC), is the major pathogen contributing to nontuberculous mycobacteria (NTM) infections worldwide. Fluoroquinolones (FQs) are recommended for the treatment of macrolide-resistant MACs. The association of FQ resistance and mutations in the quinolone resistance-determining region (QRDR) of gyrA of M. avium is not yet clearly understood, as many FQ-resistant clinical M. avium isolates do not have such mutations. This study aimed to elucidate the role of amino acid substitution in the QRDR of M. avium GyrA in the development of FQ resistance. We found four clinical M. avium subsp. hominissuis isolates with Asp-to-Gly change at position 95 (Asp95Gly) and Asp95Tyr mutations in gyrA that were highly resistant to FQs and had 2- to 32-fold-higher MICs than the wild-type (WT) isolates. To clarify the contribution of amino acid substitutions to FQ resistance, we produced recombinant WT GyrA, GyrB, and four GyrA mutant proteins (Ala91Val, Asp95Ala, Asp95Gly, and Asp95Tyr) to elucidate their potential role in FQ resistance, using them to perform FQ-inhibited DNA supercoiling assays. While all the mutant GyrAs contributed to the higher (1.3- to 35.6-fold) FQ 50% inhibitory concentration (IC50) than the WT, Asp95Tyr was the most resistant mutant, with an IC50 15- to 35.6-higher than that of the WT, followed by the Asp95Gly mutant, with an IC50 12.5- to 17.6-fold higher than that of the WT, indicating that these amino acid substitutions significantly reduced the inhibitory activity of FQs. Our results showed that amino acid substitutions in the gyrA of M. avium contribute to FQ resistance. IMPORTANCE The emergence of fluoroquinolone (FQ) resistance has further compounded the control of emerging Mycobacterium avium-associated nontuberculous mycobacteria infections worldwide. For M. avium, the association of FQ resistance and mutations in the quinolone resistance-determining region (QRDR) of gyrA is not yet clearly understood. Here, we report that four clinical M. avium isolates with a mutation in the QRDR of gyrA were highly resistant to FQs. We further clarified the impact of mutations in the QRDR of GyrA proteins by performing in vitro FQ-inhibited DNA supercoiling assays. These results confirmed that, like in Mycobacterium tuberculosis, mutations in the QRDR of gyrA also strongly contribute to FQ resistance in M. avium. Since many FQ-resistant M. avium isolates do have these mutations, the detailed molecular mechanism of FQ resistance in M. avium needs further exploration.
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Affiliation(s)
- Jeewan Thapa
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Joseph Yamweka Chizimu
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
- Zambian National Public Health Institute, Ministry of Health, Lusaka, Zambia
| | - Soyoka Kitamura
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Mwangala Lonah Akapelwa
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Pondpan Suwanthada
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Nami Miura
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Jirachaya Toyting
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | | | - Naoki Hasegawa
- Department of Infectious Diseases, Keio University School of Medicine, Tokyo, Japan
| | - Yukiko Nishiuchi
- Toneyama Institute for Tuberculosis Research, Osaka City University Medical School, Osaka, Japan
- Office of Academic Research and Industry-Government Collaboration, Section of Microbial Genomics and Ecology, Hiroshima University, Higashi-Hiroshima, Japan
| | - Stephen V. Gordon
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
| | - Chie Nakajima
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
- Institute for Vaccine Research and Development, Hokkaido University, Sapporo, Japan
| | - Yasuhiko Suzuki
- Division of Bioresources, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan
- Institute for Vaccine Research and Development, Hokkaido University, Sapporo, Japan
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Gopalaswamy R, Palani N, Viswanathan D, Preysingh B, Rajendran S, Vijayaraghavan V, Thangavel K, Vadivel SD, Stanley H, Thiruvengadam K, Jayabal L, Murugesan K, Rathinam S, Frederick A, Sivaramakrishnan G, Padmapriyadarsini C, Shanmugam S. Resistance Profiles to Second-Line Anti-Tuberculosis Drugs and Their Treatment Outcomes: A Three-Year Retrospective Analysis from South India. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1005. [PMID: 37374209 DOI: 10.3390/medicina59061005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/12/2023] [Accepted: 05/19/2023] [Indexed: 06/29/2023]
Abstract
Background: Patients with first-line drug resistance (DR) to rifampicin (RIF) or isoniazid (INH) as a first-line (FL) line probe assay (LPA) were subjected to genotypic DST using second-line (SL) LPA to identify SL-DR (including pre-XDR) under the National TB Elimination Program (NTEP), India. SL-DR patients were initiated on different DR-TB treatment regimens and monitored for their outcomes. The objective of this retrospective analysis was to understand the mutation profile and treatment outcomes of SL-DR patients. Materials and Methods: A retrospective analysis of mutation profile, treatment regimen, and treatment outcome was performed for SL-DR patients who were tested at ICMR-NIRT, Supra-National Reference Laboratory, Chennai between the years 2018 and 2020. All information, including patient demographics and treatment outcomes, was extracted from the NTEP Ni-kshay database. Results: Between 2018 and 2020, 217 patients out of 2557 samples tested were identified with SL-DR by SL-LPA. Among them, 158/217 were FQ-resistant, 34/217 were SLID-resistant, and 25/217 were resistant to both. D94G (Mut3C) of gyrA and a1401g of rrs were the most predominant mutations in the FQ and SLID resistance types, respectively. Favorable (cured and treatment complete) and unfavorable outcomes (died, lost to follow up, treatment failed, and treatment regimen changed) were recorded in a total of 82/217 and 68/217 patients in the NTEP Ni-kshay database. Conclusions: As per the testing algorithm, SL- LPA is used for genotypic DST following identification of first-line resistance, for early detection of SL-DR in India. The fluoroquinolone resistance pattern seen in this study population corelates with the global trend. Early detection of fluoroquinolone resistance and monitoring of treatment outcome can help achieve better patient management.
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Affiliation(s)
- Radha Gopalaswamy
- ICMR-National Institute for Research in Tuberculosis, Chennai 600031, India
| | - Nandhini Palani
- ICMR-National Institute for Research in Tuberculosis, Chennai 600031, India
| | - Dinesh Viswanathan
- ICMR-National Institute for Research in Tuberculosis, Chennai 600031, India
| | - Bershila Preysingh
- ICMR-National Institute for Research in Tuberculosis, Chennai 600031, India
| | | | | | | | | | - Hannah Stanley
- ICMR-National Institute for Research in Tuberculosis, Chennai 600031, India
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Agonafir M, Belay G, Feleke A, Maningi N, Girmachew F, Reta M, Fourie PB. Profile and Frequency of Mutations Conferring Drug-Resistant Tuberculosis in the Central, Southeastern and Eastern Ethiopia. Infect Drug Resist 2023; 16:2953-2961. [PMID: 37201127 PMCID: PMC10187580 DOI: 10.2147/idr.s408567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/05/2023] [Indexed: 05/20/2023] Open
Abstract
Purpose Advances in molecular tools that assess genes harboring drug resistance mutations have greatly improved the detection and treatment of drug-resistant tuberculosis (DR-TB). This study was conducted to determine the frequency and type of mutations that are responsible for resistance to rifampicin (RIF), isoniazid (INH), fluoroquinolones (FLQs) and second-line injectable drugs (SLIDs) in Mycobacterium tuberculosis (MTB) isolates obtained from culture-positive pulmonary tuberculosis (TB) patients in the central, southeastern and eastern Ethiopia. Patients and Methods In total, 224 stored culture-positive MTB isolates from pulmonary TB patients referred to Adama and Harar regional TB laboratories between August 2018 and January 2019 were assessed for mutations conferring RIF, INH, FLQs and SLIDs resistance using GenoType®MTBDRplus (MTBDRplus) and GenoType®MTBDRsl (MTBDRsl). Results RIF, INH, FLQs and SLIDs resistance-conferring mutations were identified in 88/224 (39.3%), 85/224 (38.0%), 7/77 (9.1%), and 3/77% (3.9%) of MTB isolates, respectively. Mutation codons rpoB S531L (59.1%) for RIF, katG S315T (96.5%) for INH, gyrA A90V (42.1%) for FLQs and WT1 rrs (100%) for SLIDs were observed in the majority of the isolates tested. Over a 10th of rpoB mutations detected in the current study were unknown. Conclusion In this study, the most common mutations conferring drug resistance to RIF, INH, FLQs were identified. However, a significant proportion of RIF-resistant isolates manifested unknown rpoB mutations. Similarly, although few in number, all SLID-resistant isolates had unknown rrs mutations. To further elucidate the entire spectrum of mutations, tool such as whole-genome sequencing is imperative. Furthermore, the expansion of molecular drug susceptibility testing services is critical for tailoring patient treatment and preventing disease transmission.
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Affiliation(s)
- Mulualem Agonafir
- Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
- Correspondence: Mulualem Agonafir, Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box 34738, Addis Ababa, Ethiopia, Tel +251911446959, Email
| | - Gurja Belay
- Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Adey Feleke
- Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Nontuthuko Maningi
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | | | - Melese Reta
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
- Department of Medical Laboratory Sciences, College of Health Sciences, Woldia University, Woldia, Ethiopia
| | - P Bernard Fourie
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
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Bhagwat A, Deshpande A, Parish T. How Mycobacterium tuberculosis drug resistance has shaped anti-tubercular drug discovery. Front Cell Infect Microbiol 2022; 12:974101. [PMID: 36159638 PMCID: PMC9500310 DOI: 10.3389/fcimb.2022.974101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/18/2022] [Indexed: 11/13/2022] Open
Abstract
Drug resistance is an increasing problem for the treatment of tuberculosis. The prevalence of clinical isolates with pre-existing resistance needs to be considered in any drug discovery program. Non-specific mechanisms of resistance such as increased efflux or decreased permeability need to be considered both in developing individual drug candidates and when designing novel regimens. We review a number of different approaches to develop new analogs and drug combinations or improve efficacy of existing drugs that may overcome or delay the appearance of clinical resistance. We also discuss the need to fully characterize mechanisms of resistance and cross- resistance to existing drugs to ensure that novel drugs will be clinically effective.
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Zhang X, Chen X, Wang B, Fu L, Huo F, Gao T, Pang Y, Lu Y, Li Q. Molecular Characteristic of Both Levofloxacin and Moxifloxacin Resistance in Mycobacterium tuberculosis from Individuals Diagnosed with Preextensive Drug-Resistant Tuberculosis. Microb Drug Resist 2021; 28:280-287. [PMID: 34981969 DOI: 10.1089/mdr.2021.0212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aim: Fluoroquinolones (FQs) are the cornerstone in treating drug-resistant tuberculosis (TB); the prevalence of TB among the population is diverse in different regions, understanding the relationship between resistance pattern and molecular characteristic of FQs in preextensive drug-resistant (pre-XDR) clinical isolates is limited in China. Methods: A total of 141 pre-XDR clinical isolates from different individuals stored at the National Clinical Centre were collected from the Beijing Chest Hospital, minimal inhibitory concentrations of levofloxacin (Lfx) and moxifloxacin (Mfx) as well as sequences of quinolone-resistant determining regions in gyrA and gyrB genes were examined. Results: One hundred twelve pre-XDR clinical isolates were resistant to both Lfx and Mfx, molecular analyses showed that 87.50%, 0.89%, and 6.25% of the pre-XDR clinical isolates harbored FQ resistance mutations in gyrA, gyrB, and in both. We found five amino acid mutation positions in gyrA and four in gyrB, The mutation position in gyrA included codons 94, 91, 90, 88, and 74, and in gyrB included codons 504, 500, 512, and 501. Codon 94 of gyrA was the most prevalent mutation (83.04%), containing the Asp amino acid substitution with Gly (50.89%), Asn (15.17%), Ala (8.93%), Tyr (6.25%), and His (1.79%). Conclusions: The mutations of gyrA were most common and the frequency of Asp94Gly was the highest in pre-XDR clinical isolates in Beijing, China. The mutations at codon 94 significantly contributed to the resistance to both Lfx and Mfx in pre-XDR clinical isolates and may cause a high resistance level.
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Affiliation(s)
- Xiaofu Zhang
- Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Xi Chen
- Beijing Key Laboratory on Drug-Resistant Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Bin Wang
- Beijing Key Laboratory on Drug-Resistant Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Lei Fu
- Beijing Key Laboratory on Drug-Resistant Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Fengmin Huo
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Tianhui Gao
- Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Yu Pang
- Biobank of Tuberculosis, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Yu Lu
- Beijing Key Laboratory on Drug-Resistant Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Qi Li
- Clinical Center on Tuberculosis Control, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing Chest Hospital, Capital Medical University, Beijing, China
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Al-Mutairi NM, Ahmad S, Mokaddas E. Increasing prevalence of resistance to second-line drugs among multidrug-resistant Mycobacterium tuberculosis isolates in Kuwait. Sci Rep 2021; 11:7765. [PMID: 33833390 PMCID: PMC8032671 DOI: 10.1038/s41598-021-87516-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/30/2021] [Indexed: 11/13/2022] Open
Abstract
Molecular methods detect genetic mutations associated with drug resistance. This study detected resistance-conferring mutations in gyrA/gyrB for fluoroquinolones and rrs/eis genes for second-line injectable drugs (SLIDs) among multidrug-resistant Mycobacterium tuberculosis (MDR-TB) isolates in Kuwait. Fifty pansusceptible M. tuberculosis and 102 MDR-TB strains were tested. Phenotypic susceptibility testing was performed by MGIT 960 system using SIRE drug kit. GenoType MTBDRsl version 1 (gMTBDRslv1) and GenoType MTBDRsl version 2 (gMTBDRslv2) tests were used for mutation detection. Results were validated by PCR-sequencing of respective genes. Fingerprinting was performed by spoligotyping. No mutations were detected in pansusceptible isolates. gMTBDRslv1 detected gyrA mutations in 12 and rrs mutations in 8 MDR-TB isolates. gMTBDRsl2 additionally detected gyrB mutations in 2 and eis mutation in 1 isolate. Mutations in both gyrA/gyrB and rrs/eis were not detected. gMTBDRslv1 also detected ethambutol resistance-conferring embB mutations in 59 isolates. Although XDR-TB was not detected, frequency of resistance-conferring mutations for fluoroquinolones or SLIDs was significantly higher among isolates collected during 2013–2019 versus 2006–2012. Application of both tests is warranted for proper management of MDR-TB patients in Kuwait as gMTBDRslv2 detected resistance to fluoroquinolones and/or SLIDs in 3 additional isolates while gMTBDRslv1 additionally detected resistance to ethambutol in 58% of MDR-TB isolates.
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Affiliation(s)
- Noura M Al-Mutairi
- Department of Microbiology, Faculty of Medicine, Health Sciences Centre, Kuwait University, P. O. Box 24923, 13110, Safat, Kuwait
| | - Suhail Ahmad
- Department of Microbiology, Faculty of Medicine, Health Sciences Centre, Kuwait University, P. O. Box 24923, 13110, Safat, Kuwait.
| | - Eiman Mokaddas
- Department of Microbiology, Faculty of Medicine, Health Sciences Centre, Kuwait University, P. O. Box 24923, 13110, Safat, Kuwait.,Kuwait National TB Control Laboratory, Shuwaikh, Kuwait
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