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Yu X, He Y, Gu Y, Zhang T, Huo F, Liang Q, Wu J, Hu Y, Wang X, Tang W, Huang H, Liu G. The Homologous Gene of Chromosomal Virulence D ( chvD) Presents High Resolution as a Novel Biomarker in Mycobacterium Species Identification. Infect Drug Resist 2023; 16:6039-6052. [PMID: 37719646 PMCID: PMC10503549 DOI: 10.2147/idr.s422191] [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: 06/11/2023] [Accepted: 08/17/2023] [Indexed: 09/19/2023] Open
Abstract
Objective To evaluate the resolution of chromosomal virulence D (chvD) as a novel marker for mycobacterial species identification. Methods A segment of chvD (652 bp) was amplified by PCR from 63 mycobacterial reference strains, 163 nontuberculous mycobacterial clinical isolates, and 16 M. tuberculosis complex (MTBC) clinical isolates. A phylogenetic tree based on the reference strains was constructed by the neighbor-joining and IQ-tree methods. Comparative sequence analysis of the homologous chvD gene efficiently differentiated the species within the genus Mycobacterium. Slowly growing Mycobacterium (SGM) and rapidly growing Mycobacterium (RGM) were separated in the phylogenetic tree based on the chvD gene. Results The sequence discrepancies were obvious between M. kansasii and M. gastri, M. chelonae and M. abscessus, and M. avium and M. intracellulare, none of which could be achieved by 16S ribosomal RNA (rRNA) homologous gene alignment. Furthermore, chvD manifested larger intraspecies diversity among members of M. intracellulare subspecies. A total of 174 of the 179 (97.21%) clinical isolates, consisting of 12 mycobacterial species, were identified correctly by chvD blast. Four M. abscessus subsp. abscessus were identified as M. abscessus subsp. bolletii by chvD. MTBC isolates were indistinguishable, because they showed 99.84%-100% homology. Conclusion Homologous chvD is a promising gene marker for identifying mycobacterial species, and could be used for highly accurate species identification among mycobacteria.
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Affiliation(s)
- Xia Yu
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Yingxia He
- Wuhan Pulmonary Hospital, Wuhan Institution of Tuberculosis Control, Wuhan, 430030, People’s Republic of China
| | - Yuzhen Gu
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Tingting Zhang
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Fengmin Huo
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Qian Liang
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Jing Wu
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Yan Hu
- Wuhan Pulmonary Hospital, Wuhan Institution of Tuberculosis Control, Wuhan, 430030, People’s Republic of China
| | - Xuan Wang
- Wuhan Pulmonary Hospital, Wuhan Institution of Tuberculosis Control, Wuhan, 430030, People’s Republic of China
| | - Wei Tang
- Wuhan Pulmonary Hospital, Wuhan Institution of Tuberculosis Control, Wuhan, 430030, People’s Republic of China
| | - Hairong Huang
- National Clinical Laboratory on Tuberculosis, Beijing Key Laboratory on Drug-Resistant Tuberculosis, Beijing Chest Hospital, Capital Medical University, Beijing, 101149, People’s Republic of China
| | - Guan Liu
- Wuhan Pulmonary Hospital, Wuhan Institution of Tuberculosis Control, Wuhan, 430030, People’s Republic of China
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Coinfection With Multiple Nontuberculous Mycobacteria as a Possible Exacerbating Factor in Pulmonary Nontuberculous Mycobacteriosis. Chest 2020; 158:2304-2313. [DOI: 10.1016/j.chest.2020.06.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 06/10/2020] [Accepted: 06/10/2020] [Indexed: 11/20/2022] Open
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Messaritakis I, Vogiatzoglou K, Tsantaki K, Ntretaki A, Sfakianaki M, Koulouridi A, Tsiaoussis J, Mavroudis D, Souglakos J. The Prognostic Value of the Detection of Microbial Translocation in the Blood of Colorectal Cancer Patients. Cancers (Basel) 2020; 12:E1058. [PMID: 32344707 PMCID: PMC7226464 DOI: 10.3390/cancers12041058] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 02/07/2023] Open
Abstract
Dysbiosis has been associated with various diseases and is of major health importance. Dysbiosis leads to microbial translocation, which is the passage of microorganisms, their fragments, or their metabolites from the intestinal lumen into the blood circulation and other sites. The aim of the study was to determine whether microbial translocation occurs in stage II/III-IV colorectal cancer (CRC) patients. The aim was also to evaluate the usefulness of blood PCR for diagnosis of such translocation and correlate the presence of toll-like receptor/vitamin D receptor (TLR/VDR) gene polymorphisms with microbial DNA fragments detected in the blood of CRC patients. Three hundred and ninety-seven CRC patients enrolled in the study. Peripheral blood DNA was analyzed using PCR for the amplification of genomic DNA encoding 16S rRNA, the β-galactosidase gene of Escherichia coli, glutamine synthase gene of Bacteroides fragilis, and 5.8S rRNA of Candida albicans. Significantly higher rates of all microbial fragments, but E. coli, detected were observed in the CRC patients (p < 0.001); such detection of all four microbial fragments was also significantly associated with the metastatic disease (p < 0.001), leading to shorter survival rates (p < 0.001). Tumor location in the right colon also significantly correlated with shorter survival (p = 0.016). Individuals with homozygous mutant alleles of TLR/VDR polymorphisms had significantly higher detection rates of microbial DNA fragments. The detection of microbial DNA fragments in CRC patients highlighted the role of these microbes in cancer development, progression, and patients' survival.
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Affiliation(s)
- Ippokratis Messaritakis
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
| | - Konstantinos Vogiatzoglou
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
| | - Konstantina Tsantaki
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
| | - Agapi Ntretaki
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
| | - Maria Sfakianaki
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
| | - Asimina Koulouridi
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
| | - John Tsiaoussis
- Laboratory of Anatomy, Medical School, University of Crete, 70013 Heraklion, Crete, Greece;
| | - Dimitrios Mavroudis
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
- Department of Medical Oncology, University General Hospital of Heraklion, 70013 Heraklion, Crete, Greece
| | - John Souglakos
- Laboratory of Translational Oncology, Medical School, University of Crete, 70013 Heraklion, Crete, Greece; (K.V.); (K.T.); (A.N.); (M.S.); (A.K.); (D.M.); (J.S.)
- Department of Medical Oncology, University General Hospital of Heraklion, 70013 Heraklion, Crete, Greece
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Sari NIP, Mertaniasih NM, Soedarsono, Maruyama F. Application of serial tests for Mycobacterium tuberculosis detection to active lung tuberculosis cases in Indonesia. BMC Res Notes 2019; 12:313. [PMID: 31159846 PMCID: PMC6547566 DOI: 10.1186/s13104-019-4350-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/29/2019] [Indexed: 11/13/2022] Open
Abstract
Objective Rapid detection and accurate diagnosis are very important in managing active tuberculosis because they provide an advantage in preventing further disease transmission. In accordance with the recommendation of the World Health Organization, the Indonesian Tuberculosis Control Program uses the acid fast bacilli (AFB) smear and Chest X-ray methods as the primary methods for detecting tuberculosis, especially in new cases of suspected tuberculosis. The genus Mycobacterium has many species, strains, and variants, and their natural differences may affect the clinical outcome of the diseases they induce. The purpose of this study was to assess different tuberculosis detection methods as part of serial tests and determine the best diagnostic approach for detecting active lung tuberculosis in Indonesia. Results This study used clinical samples from tuberculosis patients and assessed them using a series of tests, aiming to increase the sensitivity of active tuberculosis detection. Some samples that yielded negative results in the AFB smear test were detected as positive for Mycobacterium tuberculosis using the nucleic acid amplification test, with a sensitivity of 83.1%. Additionally, nucleic acid amplification also detected positive results among samples assessed as M. tuberculosis-negative using the culture method, this method yielded the same results as the Gene Xpert test.
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Affiliation(s)
- Nastiti Intan Permata Sari
- Doctoral Program of Medical Science, Faculty of Medicine, Universitas Airlangga, Jl. Mayjen. Prof. Dr. Moestopo No. 47, Surabaya, 60131, Indonesia. .,Laboratory of Tuberculosis, Institute of Tropical Disease, Universitas Airlangga, Kampus C, Jl. Mulyorejo, Surabaya, 60115, Indonesia.
| | - Ni Made Mertaniasih
- Department of Clinical Microbiology, Faculty of Medicine, Universitas Airlangga, Jl. Mayjen. Prof. Dr. Moestopo No. 47, Surabaya, 60131, Indonesia. .,Laboratory of Tuberculosis, Institute of Tropical Disease, Universitas Airlangga, Kampus C, Jl. Mulyorejo, Surabaya, 60115, Indonesia.
| | - Soedarsono
- Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, Universitas Airlangga, Jl. Mayjen. Prof. Dr. Moestopo No. 47, Surabaya, 60131, Indonesia
| | - Fumito Maruyama
- Department of Microbiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Abstract
Mycobacterium porcinum is a rapidly growing environmental mycobacterium responsible for opportunistic infections. The 7,025,616-bp draft genome of M. porcinum strain CSURP1564 exhibits a 66.71% G+C content, 6,687 protein-coding genes, and 65 predicted RNA genes. In silico DNA-DNA hybridization confirms its assignment to the Mycobacterium fortuitum complex.
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Fujikura H, Kasahara K, Ogawa Y, Hirai N, Yoshii S, Yoshihara S, Ogawa T, Yonekawa S, Imakita N, Nishioka Y, Yoneda T, Yoshida K, Samejima KI, Tanabe K, Saito Y, Yano H, Mikasa K. Mycobacterium wolinskyi Peritonitis after Peritoneal Catheter Embedment Surgery. Intern Med 2017; 56:3097-3101. [PMID: 28943571 PMCID: PMC5725868 DOI: 10.2169/internalmedicine.8871-17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Mycobacterium wolinskyi belongs to the Mycobacterium smegmatis group, which comprises rapidly growing non-tuberculous mycobacteria. The number of case reports on M. wolinskyi infections associated with postoperative wounds has increased in recent years. We herein report a case of peritonitis due to M. wolinskyi after peritoneal catheter embedment surgery. Identification was achieved based on 16S ribosomal RNA and rpoB gene sequencing of the isolate. The patient recovered following catheter removal and treatment with levofloxacin and minocycline for one month.
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Affiliation(s)
| | - Kei Kasahara
- Center for Infectious Diseases, Nara Medical University, Japan
| | - Yoshihiko Ogawa
- Center for Infectious Diseases, Nara Medical University, Japan
| | - Nobuyasu Hirai
- Center for Infectious Diseases, Nara Medical University, Japan
| | - Seiya Yoshii
- Center for Infectious Diseases, Nara Medical University, Japan
| | | | - Taku Ogawa
- Center for Infectious Diseases, Nara Medical University, Japan
| | | | - Natsuko Imakita
- Center for Infectious Diseases, Nara Medical University, Japan
| | - Yuichi Nishioka
- Center for Infectious Diseases, Nara Medical University, Japan
| | - Tatsuo Yoneda
- Department of Urology, Nara Medical University, Japan
| | | | - Ken-Ichi Samejima
- First Department of Internal Medicine, Nara Medical University, Japan
| | - Kaori Tanabe
- First Department of Internal Medicine, Nara Medical University, Japan
| | - Yoshihiko Saito
- First Department of Internal Medicine, Nara Medical University, Japan
| | - Hisakazu Yano
- Department of Microbiology and Infectious Diseases, Nara Medical University, Japan
| | - Keiichi Mikasa
- Center for Infectious Diseases, Nara Medical University, Japan
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Nasr Esfahani B, Moghim S, Ghasemian Safaei H, Moghoofei M, Sedighi M, Hadifar S. Phylogenetic Analysis of Prevalent Tuberculosis and Non-Tuberculosis Mycobacteria in Isfahan, Iran, Based on a 360 bp Sequence of the rpoB Gene. Jundishapur J Microbiol 2016; 9:e30763. [PMID: 27284397 PMCID: PMC4898205 DOI: 10.5812/jjm.30763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Revised: 01/18/2016] [Accepted: 02/01/2016] [Indexed: 11/16/2022] Open
Abstract
Background Taxonomic and phylogenetic studies of Mycobacterium species have been based around the 16sRNA gene for many years. However, due to the high strain similarity between species in the Mycobacterium genus (94.3% - 100%), defining a valid phylogenetic tree is difficult; consequently, its use in estimating the boundaries between species is limited. The sequence of the rpoB gene makes it an appropriate gene for phylogenetic analysis, especially in bacteria with limited variation. Objectives In the present study, a 360bp sequence of rpoB was used for precise classification of Mycobacterium strains isolated in Isfahan, Iran. Materials and Methods From February to October 2013, 57 clinical and environmental isolates were collected, subcultured, and identified by phenotypic methods. After DNA extraction, a 360bp fragment was PCR-amplified and sequenced. The phylogenetic tree was constructed based on consensus sequence data, using MEGA5 software. Results Slow and fast-growing groups of the Mycobacterium strains were clearly differentiated based on the constructed tree of 56 common Mycobacterium isolates. Each species with a unique title in the tree was identified; in total, 13 nods with a bootstrap value of over 50% were supported. Among the slow-growing group was Mycobacterium kansasii, with M. tuberculosis in a cluster with a bootstrap value of 98% and M. gordonae in another cluster with a bootstrap value of 90%. In the fast-growing group, one cluster with a bootstrap value of 89% was defined, including all fast-growing members present in this study. Conclusions The results suggest that only the application of the rpoB gene sequence is sufficient for taxonomic categorization and definition of a new Mycobacterium species, due to its high resolution power and proper variation in its sequence (85% - 100%); the resulting tree has high validity.
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Affiliation(s)
- Bahram Nasr Esfahani
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
| | - Sharareh Moghim
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
| | - Hajieh Ghasemian Safaei
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
| | - Mohsen Moghoofei
- Department of Virology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, IR Iran
| | - Mansour Sedighi
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
| | - Shima Hadifar
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran
- Corresponding author: Shima Hadifar, Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, IR Iran. Tel: +98-3137922493, Fax: +98-3136688597, E-mail:
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Hadifar S, Moghim S, Fazeli H, GhasemianSafaei H, Havaei SA, Farid F, Esfahani BN. Molecular typing of Iranian mycobacteria isolates by polymerase chain reaction-restriction fragment length polymorphism analysis of 360-bp rpoB gene. Adv Biomed Res 2015; 4:152. [PMID: 26380237 PMCID: PMC4550954 DOI: 10.4103/2277-9175.161579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 02/15/2015] [Indexed: 11/30/2022] Open
Abstract
Background: Diagnosis and typing of Mycobacterium genus provides basic tools for investigating the epidemiology and pathogenesis of this group of bacteria. Polymerase chain reaction (PCR)-restriction fragment length polymorphism analysis (PRA) is an accurate method providing diagnosis and typing of species of mycobacteria. The present study is conducted by the purpose of determining restriction fragment profiles of common types of mycobacteria by PRA method of rpoB gene in this geographical region. Materials and Methods: Totally 60 clinical and environmental isolates from February to October, 2013 were collected and subcultured and identified by phenotypic methods. A 360 bp fragment of the rpoB gene amplified by PCR and products were digested by MspI and HaeIII enzymes. Results: In the present study, of all mycobacteria isolates identified by PRA method, 13 isolates (21.66%) were Mycobacterium tuberculosis, 34 isolates (56.66%) were rapidly growing Nontuberculosis Mycobacteria (NTM) that including 26 clinical isolates (43.33%) and 8 environmental isolates (13.33%), 11 isolates (18.33%) were clinical slowly growing NTM. among the clinical NTM isolates, Mycobacterium fortuitum Type I with the frequency of 57.77% was the most prevalent type isolates. Furthermore, an unrecorded of the PRA pattern of Mycobacterium conceptionense (HeaIII: 120/90/80, MspI: 120/105/80) was found. This study demonstrated that the PRA method was high discriminatory power for identification and typing of mycobacteria species and was able to identify 96.6% of all isolates. Conclusion: Based on the result of this study, rpoB gene could be a potentially useful tool for identification and investigation of molecular epidemiology of mycobacterial species.
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Affiliation(s)
- Shima Hadifar
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
| | - Sharareh Moghim
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
| | - Hossein Fazeli
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
| | - Hajieh GhasemianSafaei
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
| | - Seyed Asghar Havaei
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
| | - Fariba Farid
- Department of Health, Isfahan Provincial Health Office, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
| | - Bahram Nasr Esfahani
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I. R. Iran
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Nontuberculous Mycobacteria Isolation from Clinical and Environmental Samples in Iran: Twenty Years of Surveillance. BIOMED RESEARCH INTERNATIONAL 2015; 2015:254285. [PMID: 26180788 PMCID: PMC4477424 DOI: 10.1155/2015/254285] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 09/17/2014] [Indexed: 11/17/2022]
Abstract
Nontuberculous mycobacteria (NTM) are opportunistic pathogens that are widely distributed in the environment. There is a lack of data on species distribution of these organisms from Iran. This study consists of a review of NTM articles published in Iran between the years 1992 and 2014. In this review, 20 articles and 14 case reports were identified. Among the 20 articles, 13 (65%) studies focused on NTM isolates from clinical specimens, 6 (30%) studies examined NTM isolates from environmental samples, and one (5%) article included both clinical and environmental isolates. M. fortuitum (229/997; 23%) was recorded as the most prevalent and rapid growing mycobacteria (RGM) species in both clinical (28%) and environmental (19%) isolated samples (P < 0.05). Among slow growing mycobacteria (SGM), M. simiae (103/494; 21%) demonstrated a higher frequency in clinical samples whereas in environmental samples it was M. flavescens (44/503; 9%). These data represent information from 14 provinces out of 31 provinces of Iran. No information is available in current published data on clinical or environmental NTM from the remaining 17 provinces in Iran. These results emphasize the potential importance of NTM as well as the underestimation of NTM frequency in Iran. NTM is an important clinical problem associated with significant morbidity and mortality in Iran. Continued research is needed from both clinical and environmental sources to help clinicians and researchers better understand and address NTM treatment and prevention.
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Joao I, Cristovao P, Antunes L, Nunes B, Jordao L. Identification of nontuberculous mycobacteria by partial gene sequencing and public databases. Int J Mycobacteriol 2014; 3:144-51. [DOI: 10.1016/j.ijmyco.2014.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 04/07/2014] [Indexed: 11/26/2022] Open
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Velayati AA, Farnia P, Mozafari M, Sheikholeslami MF, Karahrudi MA, Tabarsi P, Hoffner S. High prevelance of rifampin-monoresistant tuberculosis: a retrospective analysis among Iranian pulmonary tuberculosis patients. Am J Trop Med Hyg 2013; 90:99-105. [PMID: 24189362 DOI: 10.4269/ajtmh.13-0057] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
We determined the prevalence of rifampin-monoresistant tuberculosis (RMR-TB) in Iran. Because development of RMR-TB is not common, we also identified the major risk factors associated with RMR-TB reported from different provinces of Iran. Data for 3,020 TB patients who remained or became smear positive after two, four, six, and nine months of standard first-line chemotherapy were retrospectively analyzed. Of 3,020 patients, 1,242 patients (41.1%) were culture and DNA positive for Mycobacterium tuberculosis. Of these patients, 73 (7.4%) patients had monoresistant isolates to rifampin, which was significantly higher than that for multidrug-resistant TB (5.8%). The average rate of RMR-TB in the studied population ranged from 5% to 10%. Classical investigation showed that 33.6% of patients had either a previous or family history of TB. Molecular epidemiology methods (i.e., spoligotyping and Mycobacterium interspersed repetitive unit-variable number tandem repeat), defined transmission link in three clusters (13%). These results outline the urgent need for a comprehensive plan for detection and treatment of RMR-TB cases.
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Affiliation(s)
- Ali Akbar Velayati
- Mycobacteriology Research Centre, Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Disease (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran; World Health Organization Supranational Reference Laboratory for Tuberculosis, Swedish Institute for Communicable Disease Control, Stockholm, Sweden
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