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Coban AY, Akbal AU, Ceyhan I, Uzun M, Sertel Selale D, Aslan G, Delialioglu N, Ozyurt M, Bektore B, Bicmen C, Aslanturk A, Ucarman N, Albay A, Sig AK, Ozkutuk N, Surucuoglu S. A new colorimetric method for rapid detection of ethambutol and streptomycin resistance in Mycobacterium tuberculosis: crystal violet decolorization assay (CVDA). Antonie van Leeuwenhoek 2018; 112:679-685. [PMID: 30417212 DOI: 10.1007/s10482-018-1198-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 11/02/2018] [Indexed: 10/27/2022]
Abstract
Streptomycin (STR) and ethambutol (EMB) are important drugs used for the treatment of tuberculosis. There is a need for fast, reliable and inexpensive methods for detecting resistance to these drugs. The aim of this study was to evaluate the performance of the crystal violet decolorization assay (CVDA) for the detection of STR and EMB resistance that is important drugs in tuberculosis treatment. In this study, drug susceptibility testing was performed on 140 Mycobacterium tuberculosis isolates provided from nine centers. Three tubes were used for each isolate. One of the tubes had a concentration of 2 mg/L STR and the other 5 mg/L EMB. The third was drug-free control tube. Sensitivity, specificity, positive predictive value (PPD), negative predictive value (NPD) and agreement for STR were found to be 81.8%, 94.6%, 87.8%, 91.5% and 90.57%, respectively. For EMB, sensitivity, specificity, PPD, NPD, and agreement were found to be 76%, 98.23%, 90.47%, 94.87% and 94.2%, respectively. The results were obtained in 11.3 ± 2.7 days (8-21 days). CVDA is rapid, reliable, inexpensive, and easy to perform for rapid detection of STR and EMB resistance, and it could be adapted for drug susceptibility testing.
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Affiliation(s)
- Ahmet Yilmaz Coban
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Akdeniz University, Antalya, Turkey.
| | - Ahmet Ugur Akbal
- Department of Medical Microbiology, Ondokuz Mayis University Medical School, Samsun, Turkey
| | - Ismail Ceyhan
- Medical Microbiology Laboratory, Ataturk Chest Disease and Chest Surgery Training and Research Hospital, Ankara, Turkey
| | - Meltem Uzun
- Department of Medical Microbiology, Istanbul Medical School, Istanbul University, Istanbul, Turkey
| | - Deniz Sertel Selale
- Department of Medical Microbiology, Istanbul Medical School, Istanbul University, Istanbul, Turkey
| | - Gonul Aslan
- Department of Medical Microbiology, Mersin University Medical School, Mersin, Turkey
| | - Nuran Delialioglu
- Department of Medical Microbiology, Mersin University Medical School, Mersin, Turkey
| | - Mustafa Ozyurt
- Department of Medical Microbiology, Sultan Abdulhamit Han Training and Research Hospital, Gulhane Medical School, Health Sciences University, Istanbul, Turkey
| | - Beyhan Bektore
- Department of Medical Microbiology, Sultan Abdulhamit Han Training and Research Hospital, Gulhane Medical School, Health Sciences University, Istanbul, Turkey
| | - Can Bicmen
- Medical Microbiology Laboratory, University of Health Sciences, Dr. Suat Seren Chest Diseases and Surgery Training and Research Hospital, Izmir, Turkey
| | - Ahmet Aslanturk
- Tuberculosis Reference Laboratory, Public Health Agency of Turkey, Ankara, Turkey
| | - Nilay Ucarman
- Tuberculosis Reference Laboratory, Public Health Agency of Turkey, Ankara, Turkey
| | - Ali Albay
- Department of Medical Microbiology, Gulhane Medical School, Health Sciences University, Ankara, Turkey
| | - Ali Korhan Sig
- Department of Medical Microbiology, Gulhane Medical School, Health Sciences University, Ankara, Turkey
| | - Nuri Ozkutuk
- Department of Medical Microbiology, Celal Bayar University Medical School, Manisa, Turkey
| | - Suheyla Surucuoglu
- Department of Medical Microbiology, Celal Bayar University Medical School, Manisa, Turkey
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Kumar K, Giribhattanavar P, Sagar C, Patil S. A rapid and simple resazurin assay to detect minimum inhibitory concentrations of first-line drugs for Mycobacterium tuberculosis isolated from cerebrospinal fluid. J Glob Antimicrob Resist 2017; 12:157-161. [PMID: 28964954 DOI: 10.1016/j.jgar.2017.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 07/13/2017] [Accepted: 09/20/2017] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVES Central nervous system tuberculosis (CNS-TB) is a devastating manifestation of TB. The most common form of CNS-TB is tuberculous meningitis. Drug-resistant TB poses a major threat to the control of TB worldwide. Timely treatment dramatically improves the outcome. Colorimetric techniques for drug susceptibility testing based on the oxidation-reduction principle give results quick and are less expensive. The objectives of this study were to compare the susceptibility of Mycobacterium tuberculosis isolated from cerebrospinal fluid to four first-line drugs using the MGIT automated mycobacterial detection system and the resazurin assay (RA) as well as to estimate the minimum inhibitory concentrations (MICs) by RA. METHODS A total of 42 M. tuberculosis isolates were analysed for their susceptibilities by MGIT and RA. RESULTS Of the 42 isolates, 35 gave concordant results with both methods. Agreement between the two tests for streptomycin and rifampicin was 100% with a Fleiss' kappa (κ) value of 1, whereas for isoniazid and ethambutol agreement was 92.86% and 90.48%, respectively, with κ values of 0.853 and 0.738. CONCLUSION The RA appears to be a good alternative to the automated MGIT technique in resource-limited settings.
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Affiliation(s)
- Kavitha Kumar
- Department of Neuromicrobiology, National Institute of Mental Health and Neurosciences (NIMHANS), Hosur Road, Bengaluru, Karnataka 560029, India
| | - Prashant Giribhattanavar
- Department of Neuromicrobiology, National Institute of Mental Health and Neurosciences (NIMHANS), Hosur Road, Bengaluru, Karnataka 560029, India
| | - Chandrasekhar Sagar
- Department of Neuropathology, National Institute of Mental Health and Neurosciences (NIMHANS), Hosur Road, Bengaluru, Karnataka 560029, India.
| | - Shripad Patil
- Department of Neuromicrobiology, National Institute of Mental Health and Neurosciences (NIMHANS), Hosur Road, Bengaluru, Karnataka 560029, India.
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Coban AY, Deveci A, Sunter AT, Palomino JC, Martin A. Resazurin microtiter assay for isoniazid, rifampicin, ethambutol and streptomycin resistance detection in Mycobacterium tuberculosis: Updated meta-analysis. Int J Mycobacteriol 2014; 3:230-41. [DOI: 10.1016/j.ijmyco.2014.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 09/04/2014] [Indexed: 11/26/2022] Open
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Liu K, Wen Z, Li N, Yang W, Wang J, Hu L, Dong X, Lu J, Li J. Impact of relative humidity and collection media on mycobacteriophage D29 aerosol. Appl Environ Microbiol 2012; 78:1466-72. [PMID: 22194291 PMCID: PMC3294485 DOI: 10.1128/aem.06610-11] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Accepted: 12/12/2011] [Indexed: 01/21/2023] Open
Abstract
This study was conducted to evaluate the effect of aerosol generation, methods of sampling, storage conditions, and relative humidity on the culturability of the mycobacteriophage D29. The lytic phage D29 can kill Mycobacterium tuberculosis, and the phage aerosol can be treated as a potential tool for tuberculosis treatment. The culturability of D29 was tested using a test chamber designed for the bioaerosols research against three spray liquids (deionized water, phosphate-buffered saline [PBS], and normal saline), four collection media (suspension medium [SM], nutrient broth, PBS, and deionized water), two sampling systems (the all-glass impinger AGI-30 and the Biosampler) and across a range of humidities (20 to 90%). The effect of storage conditions on the culturability of collected sample was also evaluated for the AGI-30 impinger. The results proved that viable phage D29 particles generated by deionized water were approximately 30- and 300-fold higher than PBS and normal saline, respectively. As collection media, SM buffer and nutrient broth were observed to yield a higher number of plaques compared to PBS and deionized water. No difference was observed in collection efficiency between AGI-30 and Biosampler with two detection methods (culture-based technique and real-time PCR). The culturability of collected D29 in SM buffer or nutrient broth can be maintained up to 12 h irrespective of storage temperature. Relative humidity was found to strongly influence airborne D29 culturability which is 2- to 20-fold higher in low humidity (25%) than medium (55%) or high (85%) humidity. This research will help identify the optimal means for the application of D29 aerosol in animal inhalation experiments.
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Affiliation(s)
- Keyang Liu
- Beijing Institute of Microbiology andEpidemiology, Beijing, People's Republic of China
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Evaluation of fluoromycobacteriophages for detecting drug resistance in Mycobacterium tuberculosis. J Clin Microbiol 2011; 49:1838-42. [PMID: 21346042 DOI: 10.1128/jcm.02476-10] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We tested a new method for detecting drug-resistant strains of Mycobacterium tuberculosis that uses a TM4 mycobacteriophage phAE87::hsp60-EGFP (EGFP-phage) engineered to contain the gene encoding enhanced green fluorescent protein (EGFP). After promising results in preliminary studies, the EGFP-phage was used to detect isoniazid (INH), rifampin (RIF), and streptomycin (STR) resistance in 155 strains of M. tuberculosis, and the results were compared to the resazurin microplate technique, with the proportion method serving as the reference standard. The resazurin technique yielded sensitivities of 94% for INH and RIF and 98% for STR and specificities of 97% for INH, 95% for RIF, and 98% for STR. The sensitivity of EGFP-phage was 94% for all three antibiotics, with specificities of 90% for INH, 93% for RIF, and 95% for STR. The EGFP-phage results were available in 2 days for RIF and STR and in 3 days for INH, with an estimated cost of ∼2$ to test the three antibiotics. Using a more stringent criterion for resistance improved the specificity of the EGFP-phage for INH and RIF without affecting the sensitivity. In preliminary studies, the EGFP-phage could also effectively detect resistance to the fluoroquinolones. The EGFP-phage method has the potential to be a valuable rapid and economic screen for detecting drug-resistant tuberculosis if the procedure can be simplified, if it can be adapted to clinical material, and if its sensitivity can be improved.
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Stella EJ, de la Iglesia AI, Morbidoni HR. Comparison of the performance of two mycobacteriophage D29-based protocols for fluoroquinolone susceptibility testing in Mycobacterium tuberculosis. J Microbiol Methods 2009; 79:371-3. [PMID: 19846046 DOI: 10.1016/j.mimet.2009.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 10/11/2009] [Accepted: 10/12/2009] [Indexed: 10/20/2022]
Abstract
We tested a mycobacteriophage D29-based method for fluoroquinolone susceptibility assessment in clinical isolates of Mycobacteriumtuberculosis. The method was incapable of identifying susceptible strains as such, although a slightly different published protocol successfully identified resistant and susceptible strains. Thus, caution is necessary when choosing an "in-house" D29-based protocol for testing of drug resistance.
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Affiliation(s)
- Emma J Stella
- Cátedra de Microbiología, Facultad de Ciencias Médicas, Universidad Nacional de Rosario, 2000 Rosario, Argentina
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