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Sun C, Wang C, Xiao F, Jia N, Huang X, Fu J, Zhang Y, Zhou J, Wang G, Wang Y. Development and clinical evaluation of a real-time multiple cross displacement amplification assay for rapid and sensitive detection of Mycobacterium tuberculosis. Heliyon 2024; 10:e31901. [PMID: 38845879 PMCID: PMC11154602 DOI: 10.1016/j.heliyon.2024.e31901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 05/16/2024] [Accepted: 05/23/2024] [Indexed: 06/09/2024] Open
Abstract
Molecular techniques of nucleic acid testing recommended by the World Health Organization (WHO) for the Mycobacterium tuberculosis (MTB) detection were considered to have the potential access to the accurate tuberculosis (TB) notifications. In this study, a new method, which coupled real-time (rt) fluorescence technique with multiple cross displacement amplification (MCDA), was developed for the rapid, sensitive and specific detection of MTB (termed MTB-rt-MCDA). According to the principle of the rt-MCDA test, a set of ten primers were designed for the MCDA reaction, of which one was engineered with a restrictive endonuclease recognition site, a fluorophore and a quencher for achieving the real-time fluorescence detection. MTB-rt-MCDA test was conducted under the optimized conditions (67 °C, 40 min) on the real-time fluorescence platform. The MTB-rt-MCDA assay accurately identified the MTB strains with no cross reaction with other bacteria. The lowest detectable genomic DNA concentration of the MTB-rt-MCDA assay was 25 fg/μl. We employed the genomic DNA templates extracted from sputum of clinical cases for validating the practical applicability of this assay, and the detection power of the MTB-rt-MCDA assay was comparable to that of the Xpert method and MCDA-based biosensor detection and superior to smear microscope method. The complete process of the MTB-rt-MCDA assay, including rapid extraction of DNA and rt-MCDA test, takes less than 1 h. In conclusion, the presented MTB-rt-MCDA assay provided an effective and simple option for the rapid screening of MTB infection.
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Affiliation(s)
- Chunrong Sun
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Chaohong Wang
- Department of Clinical Laboratory, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, 101125, PR China
| | - Fei Xiao
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Nan Jia
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Xiaolan Huang
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Jin Fu
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Yu Zhang
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Juan Zhou
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
| | - Guirong Wang
- Department of Clinical Laboratory, Beijing Chest Hospital, Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Institute, Beijing, 101125, PR China
| | - Yi Wang
- Experiment Research Center, Capital Institute of Pediatrics, Beijing, 100020, PR China
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Aispuro Pérez A, Osuna-Martínez U, Espinoza-Gallardo JA, Dorantes-Álvarez LA, Inzunza-Leyva GK, Dorantes-Bernal KE, Quiñonez-Bastidas GN. Prevalence of Drug-Resistant Tuberculosis in HIV-Positive and Diabetic Patients in Sinaloa, Mexico: A Retrospective Cross-Sectional Study. Trop Med Infect Dis 2024; 9:89. [PMID: 38668550 PMCID: PMC11054973 DOI: 10.3390/tropicalmed9040089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/11/2024] [Accepted: 04/12/2024] [Indexed: 04/29/2024] Open
Abstract
Tuberculosis (TB) is a disease caused by the bacillus Mycobacterium tuberculosis (MTB). Human immunodeficiency virus (HIV) infection and type 2 diabetes mellitus (T2DM) are among the main risk factors for the development of TB and increase the risk of drug-resistant TB developing (DR-TB). The aim of this study was to estimate the prevalence of DR-TB in patients with HIV or T2DM in Sinaloa, Mexico. This was an observational and cross-sectional study. The analysis was conducted using the clinical data of patients registered on the National Epidemiological Surveillance System for TB (SINAVE/PUI-TB) platform with a presumed diagnosis of TB during 2019 to 2021 in Sinaloa, Mexico. The prevalence of DR-TB was estimated in HIV and T2DM patients, as well as the odds ratios for their sociodemographic variables, using the Chi-square test. There were 2, 4, and 4 TB-HIV cases and 2, 6, and 9 TB-T2DM cases during 2019, 2020, and 2021, respectively, whereas there were 2 and 1 DRTB-HIV and DRTB-T2DM cases, respectively. The results indicated that the WHO guidelines for DR-TB were not properly applied to this high-risk population. Hence, the appropriate application of guidelines for TB and DR-TB detection in these patients needs to be immediately implemented by the State health system.
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Affiliation(s)
- Analy Aispuro Pérez
- Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacan 80013, Sinaloa, Mexico; (A.A.P.); (U.O.-M.)
| | - Ulises Osuna-Martínez
- Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacan 80013, Sinaloa, Mexico; (A.A.P.); (U.O.-M.)
| | - Jose Angel Espinoza-Gallardo
- Coordinación Estatal de Tuberculosis, Servicios de Salud de Sinaloa, Secretaria de Salud Blvd, Alfonso Zaragoza Maytorena No. 2204, Fraccionamiento Bonanzas, Culiacan 80020, Sinaloa, Mexico (L.A.D.-Á.); (K.E.D.-B.)
| | - Luis Alfredo Dorantes-Álvarez
- Coordinación Estatal de Tuberculosis, Servicios de Salud de Sinaloa, Secretaria de Salud Blvd, Alfonso Zaragoza Maytorena No. 2204, Fraccionamiento Bonanzas, Culiacan 80020, Sinaloa, Mexico (L.A.D.-Á.); (K.E.D.-B.)
| | - Gerardo Kenny Inzunza-Leyva
- Coordinación Estatal de Tuberculosis, Servicios de Salud de Sinaloa, Secretaria de Salud Blvd, Alfonso Zaragoza Maytorena No. 2204, Fraccionamiento Bonanzas, Culiacan 80020, Sinaloa, Mexico (L.A.D.-Á.); (K.E.D.-B.)
| | - Kimberly Estefania Dorantes-Bernal
- Coordinación Estatal de Tuberculosis, Servicios de Salud de Sinaloa, Secretaria de Salud Blvd, Alfonso Zaragoza Maytorena No. 2204, Fraccionamiento Bonanzas, Culiacan 80020, Sinaloa, Mexico (L.A.D.-Á.); (K.E.D.-B.)
| | - Geovanna Nallely Quiñonez-Bastidas
- Centro de Investigación y Docencia en Ciencias de la Salud, Universidad Autónoma de Sinaloa, Eustaquio Buelna 91, Burocrata, Culiacan 80030, Sinaloa, Mexico
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Owusu W, van Vliet AHM, Riddell NE, Stewart G, Akwani WC, Aryeetey S, Arthur RA, Sylverken AA, Hingley-Wilson SM. A multiplex PCR assay for the differentiation of Mycobacterium tuberculosis complex reveals high rates of mixed-lineage tuberculosis infections among patients in Ghana. Front Cell Infect Microbiol 2023; 13:1125079. [PMID: 37077529 PMCID: PMC10108843 DOI: 10.3389/fcimb.2023.1125079] [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: 12/15/2022] [Accepted: 03/17/2023] [Indexed: 04/05/2023] Open
Abstract
In low-resource settings with high tuberculosis (TB) burdens, lack of rapid diagnostic methods for detection and differentiation of Mycobacterium tuberculosis complex (MTBC) is a major challenge affecting TB management. This study utilized comparative genomic analyses of MTBC lineages; M. tuberculosis, M. africanum Lineages 5/6 and M. bovis to identify lineage-specific genes. Primers were designed for the development of a Multiplex PCR assay which was successful in differentiating the MTBC lineages. There was no cross-reaction with other respiratory pathogens tested. Validation of the assay using clinical samples was performed with sputum DNA extracts from 341 clinically confirmed active TB patients. It was observed that 24.9% of cases were caused by M. tuberculosis, while M. africanum L5 & L6 reported 9.0% and 14.4%, respectively. M. bovis infection was the least frequently detected lineage with 1.8%. Also, 27.0% and 17.0% of the cases were PCR negative and unspeciated, respectively. However, mixed-lineage TB infections were recorded at a surprising 5.9%. This multiplex PCR assay will allow speciation of MTBC lineages in low-resource regions, providing rapid differentiation of TB infections to select appropriate medication at the earliest possible time point. It will also be useful in epidemiological surveillance studies providing reliable information on the prevalence of TB lineages as well as identifying difficult to treat cases of mixed-lineage tuberculosis infections.
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Affiliation(s)
- Wellington Owusu
- Department of Microbial Sciences, School of Biosciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Arnoud H. M. van Vliet
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Natalie E. Riddell
- Department of Biochemical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Graham Stewart
- Department of Microbial Sciences, School of Biosciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Winifred C. Akwani
- Department of Microbial Sciences, School of Biosciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Sherihane Aryeetey
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Rejoice Agyeiwaa Arthur
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Augustina Angelina Sylverken
- Kumasi Centre for Collaborative Research in Tropical Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
- Department of Theoretical and Applied Biology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Suzanne M. Hingley-Wilson
- Department of Microbial Sciences, School of Biosciences, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
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Epidemiology and Drug Resistance Patterns of Mycobacterium tuberculosis in High-Burden Area in Western Siberia, Russia. Microorganisms 2023; 11:microorganisms11020425. [PMID: 36838390 PMCID: PMC9963218 DOI: 10.3390/microorganisms11020425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/28/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
Russia is a high-burden area for multidrug-resistant tuberculosis (MDR-TB). Here, we studied the epidemiological situation and drug resistance patterns of Mycobacterium tuberculosis in the Omsk region in Western Siberia. M. tuberculosis isolates (n = 851) were recovered from newly diagnosed TB patients in 2021. The isolates were tested by bacteriological and molecular methods, and long-term epidemiological data were analyzed. The TB incidence dec, this is not variablereased from 93.9 in 2012 to 48.1 in 2021, per 100,000 population, but the primary MDR-TB rate increased from 19.2% to 26.4%. The destructive forms of tuberculosis accounted for 37.8% of all cases, while 35.5% of patients were smear-positive. Of all isolates tested, 55.2% were culture-positive, of which 94.5% were further tested for phenotypic drug resistance and associated mutations. More than half (53.4%) of isolates were drug-resistant, 13.9% were monoresistant and 67.9% were MDR. Among MDR isolates, 40.4% were pre-XDR, and 19.2% were XDR. The spectrum of drug resistance included second-line drugs (new-generation fluoroquinolones, linezolid), which significantly increase the risk of an adverse outcome in patients. In conclusion, our results highlight the critical importance of monitoring drug resistance in circulating M. tuberculosis strains emerging due to ineffective treatment and active transmission.
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Rahmati S, Bahrampour A, Nasehi M, Mirzazadeh A, Ghaderi H, Shahesmaeili A. An Evaluation of The Diagnostic Value of Sputum Smears Microscopy and Pcr Relative to Sputum Culture in The Diagnosis of Pulmonary Tuberculosis: A Systematic Review and Meta-Analysis in Iran. Med J Islam Repub Iran 2022; 36:112. [PMID: 36447544 PMCID: PMC9700423 DOI: 10.47176/mjiri.36.112] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Indexed: 11/15/2023] Open
Abstract
Background: Tuberculosis is one of the oldest known diseases in humans, and early detection of tuberculosis is one of the main measures to decrease the spread of tuberculosis. In many parts of the world, including Iran, the diagnosis of tuberculosis is based on the detection of acid-fast bacillus in sputum smear microscopy and PCR. this study aimed to synthesize evidence on the diagnostic accuracy of sputum smear and PCR compared to sputum culture for the diagnosis of PT in Iranian patients. Methods: This systematic review and meta-analysis was conducted based on PRISMA guideline for systematic review and meta-analysis. Eligible studies were cross-sectional original diagnostic studies published in English and Persian in Iran which examined the sensitivity or specificity(study outcome) of sputum smear microscopy or PCR( as the test) relative to sputum culture (as the gold standard/comparator) among Iranian patients suspected of having tuberculosis( study population). Studies whose data were not complete or extractable were excluded. Results: A total of 3518 subjects were evaluated from 15 eligible studies. The pooled sensitivity of sputum smear and PCR was 75.12 (95% CI: 66.68-83.56) and 88.02 (95% CI: 82.87-93.27), respectively. The specificity for sputum smear and PCR was 93.94 (95% CI: 91.26-96.63) and 91.82 (95% CI: 87.29-96.35) respectively. The sensitivity of both sputum smears was higher in studies published after 2010, and had higher quality. The specificity of sputum smear was a bit lower in studies published after2010 but higher in studies with higher quality. The specificity of PCR was higher in studies published after 2010 but higher in studies with higher quality. Conclusion:The increased sensitivity of sputum smear and PCR during recent years suggests the improvement of preparation and laboratory methods in recent years. However, the imperfect sensitivity of these tests highlights the need for a more accurate diagnostic method for the detection of pulmonary tuberculosis in Iran.
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Affiliation(s)
- Shoboo Rahmati
- Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran
| | - Abbas Bahrampour
- Modeling in Health Research Center, Institute for Futures Studies in Health, Department of Biostatistics and Epidemiology, Faculty of Health Kerman University of Medical Sciences, Kerman, IRAN. Adjunct Professor of Griffith University, Brisbane, QLD, Australia
| | - Mahshid Nasehi
- Department of Epidemiology, School of Health, Iran University of Medical Sciences, Iran
| | - Ali Mirzazadeh
- Department of Epidemiology, University of San Francisco, California, USA
| | - Hosna Ghaderi
- Department of Laboratory Sciences, Faculty of Paramedical, Kurdistan University of Medical Sciences, Kurdistan, Iran
| | - Armita Shahesmaeili
- HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
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WITHDRAWN: Analysis of the application value of molecular diagnostic technology of mycobacterium tuberculosis. J Clin Tuberc Other Mycobact Dis 2022. [DOI: 10.1016/j.jctube.2022.100330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Campelo TA, Cardoso de Sousa PR, Nogueira LDL, Frota CC, Zuquim Antas PR. Revisiting the methods for detecting Mycobacterium tuberculosis: what has the new millennium brought thus far? Access Microbiol 2021; 3:000245. [PMID: 34595396 PMCID: PMC8479963 DOI: 10.1099/acmi.0.000245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/17/2021] [Indexed: 01/07/2023] Open
Abstract
Tuberculosis (TB) affects around 10 million people worldwide in 2019. Approximately 3.4 % of new TB cases are multidrug-resistant. The gold standard method for detecting Mycobacterium tuberculosis, which is the aetiological agent of TB, is still based on microbiological culture procedures, followed by species identification and drug sensitivity testing. Sputum is the most commonly obtained clinical specimen from patients with pulmonary TB. Although smear microscopy is a low-cost and widely used method, its sensitivity is 50-60 %. Thus, owing to the need to improve the performance of current microbiological tests to provide prompt treatment, different methods with varied sensitivity and specificity for TB diagnosis have been developed. Here we discuss the existing methods developed over the past 20 years, including their strengths and weaknesses. In-house and commercial methods have been shown to be promising to achieve rapid diagnosis. Combining methods for mycobacterial detection systems demonstrates a correlation of 100 %. Other assays are useful for the simultaneous detection of M. tuberculosis species and drug-related mutations. Novel approaches have also been employed to rapidly identify and quantify total mycobacteria RNA, including assessments of global gene expression measured in whole blood to identify the risk of TB. Spoligotyping, mass spectrometry and next-generation sequencing are also promising technologies; however, their cost needs to be reduced so that low- and middle-income countries can access them. Because of the large impact of M. tuberculosis infection on public health, the development of new methods in the context of well-designed and -controlled clinical trials might contribute to the improvement of TB infection control.
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Affiliation(s)
- Thales Alves Campelo
- Faculdade de Medicina, Departamento de Patologia e Medicina Legal, Federal University of Ceará, Fortaleza, Brazil
| | | | - Lucas de Lima Nogueira
- Faculdade de Medicina, Departamento de Patologia e Medicina Legal, Federal University of Ceará, Fortaleza, Brazil
| | - Cristiane Cunha Frota
- Faculdade de Medicina, Departamento de Patologia e Medicina Legal, Federal University of Ceará, Fortaleza, Brazil
| | - Paulo Renato Zuquim Antas
- Laboratório de Imunologia Clínica, Instituto Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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Gouda K, Das U, Dhangadamajhi G. Utility of Fine Needle Aspiration Cytology (FNAC) in the diagnosis of tuberculous lymphadenitis compared to GeneXpert in a tertiary health care center in Northern Odisha, India. Indian J Tuberc 2021; 68:437-444. [PMID: 34752310 DOI: 10.1016/j.ijtb.2021.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/15/2020] [Accepted: 01/14/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Diagnosis of extrapulmonary tuberculosis including tuberculous lymphadenitis (TBLN) is challenging because of its atypical clinical presentation, paucibacillary nature of mycobacteria at the infected sites, variation in sensitivity of a test to specimens collected by different methods and from different infected tissues. METHODS In the present study, suspected individuals for lymph node tuberculosis irrespective of age were enrolled prospectively and specimens were collected aseptically by fine needle aspiration (FNA). After the implementation of exclusion criteria, FNA specimens from a total of 278 cases of suspected TBLN were evaluated for cytomorphology (FNAC), presence of acid-fast bacillus (AFB) in smear microscopy and specific detection of mycobacterial DNA in cartridge-based nucleic acid amplification test (CBNAAT). RESULTS The results showed high prevalence of Type II (59.71%), followed by Type I (34.53%) and Type III (5.75%) pattern in FNAC. Non-type II patterns were significantly high in regions outside of the head and neck region (P = 0.031; OR = 2.125) and had an increasing trend of their occurrences with progression of age. The most affected age group was between 16 and 30 years with female preponderance documented in individuals below 45 years, whereas male preponderance was observed in higher age group patients, majority of whom had infected lymph nodes outside of HAN region (P = 0.063, OR = 1.998). The results also showed high sensitivity of CBNAAT (83.04%) method followed by FNAC (72.17%) with AFB smear exhibiting the disappointing results (sensitivity of 10.86%) compared to the CRS. High percentage of positivity was observed in Type III (AFB:25% vs CBNAAT: 100%) followed by Type II (AFB:10.2 vs CBNAAT: 76.5), while low detection was observed from samples with Type I (AFB:4.2 vs CBNAAT: 50). Interestingly, CBNAAT detection of TB was shown to be unaffected by gender, age and site of infection. CONCLUSION The study suggests a possible contributary role of age and gender for cytomorphological pattern distribution of TBLN at various body parts. Although FNAC detected TB in 77.1% of cases which were identified positive by CBNAAT and/or AFB, it is being solely based on cytomorphology cannot be used alone as a reliable diagnostic method for TBLN detection. Further, the negative results in CBNAAT for FNAC positive cases may not necessarily be non-TB cases and must be evaluated by other diagnostic modalities. We recommend for both cytomorphological investigation and CBNNAT for the fine needle aspirates from suspected TBLN and subsequent treatment to reduce the disease burden.
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Affiliation(s)
- Kalyani Gouda
- Department of Pathology, Pandit Raghunath Murmu Medical College and Hospital, Baripada, Mayurbhanj, Odisha, India
| | - Upasana Das
- Department of Pathology, Pandit Raghunath Murmu Medical College and Hospital, Baripada, Mayurbhanj, Odisha, India
| | - Gunanidhi Dhangadamajhi
- Department of Biotechnology, Maharaja Sriram Chandra Bhanjadeo University (erstwhile known as North Orissa University), Baripada, Odisha, 757003, India.
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Salimiyan Rizi K, Aryan E, Meshkat Z, Ranjbar G, Sankian M, Ghazvini K, Farsiani H, Pourianfar HR, Rezayi M. The overview and perspectives of biosensors and Mycobacterium tuberculosis: A systematic review. J Cell Physiol 2020; 236:1730-1750. [PMID: 32930412 DOI: 10.1002/jcp.30007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 08/01/2020] [Indexed: 12/14/2022]
Abstract
Tuberculosis (TB) is referred to as a "consumption" or phthisis, which has been a fatal human disease for thousands of years. Mycobacterium tuberculosis (M. tb) might have been responsible for the death of more humans than any other bacterial pathogens. Therefore, the rapid diagnosis of this bacterial infection plays a pivotal role in the timely and appropriate treatment of the patients, as well as the prevention of disease spread. More than 98% of TB cases are reported in developing countries, and due to the lack of well-equipped and specialized diagnostic laboratories, development of effective diagnostic methods based on biosensors is essential for this bacterium. In this review, original articles published in English were retrieved from multiple databases, such as PubMed, Scopus, Google Scholar, Science Direct, and Cochrane Library during January 2010-October 2019. In addition, the reference lists of the articles were also searched. Among 109 electronically searched citations, 42 articles met the inclusion criteria. The highest potential and wide usage of biosensors for the diagnosis of M. tb and its drug resistance belonged to DNA electrochemical biosensors (isoniazid and rifampin strains). Use of biosensors is expanding for the detection of resistant strains of anti-TB antibiotics with high sensitivity and accuracy, while the speed of these sensory methods is considered essential as well. Furthermore, the lowest limit of detection (0.9 fg/ml) from an electrochemical DNA biosensor was based on graphene-modified iron-oxide chitosan hybrid deposited on fluorine tin oxide for the MPT64 antigen target. According to the results, the most common methods used for M. tb detection include acid-fast staining, cultivation, and polymerase chain reaction (PCR). Although molecular techniques (e.g., PCR and real-time PCR) are rapid and sensitive, they require sophisticated laboratory and apparatuses, as well as skilled personnel and expertise in the commentary of the results. Biosensors are fast, valid, and cost-efficient diagnostic method, and the improvement of their quality is of paramount importance in resource-constrained settings.
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Affiliation(s)
- Kobra Salimiyan Rizi
- Department of Medical Bacteriology and Virology, School of Medicine, Antimicrobial Resistance Research Center, Qaem University Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ehsan Aryan
- Department of Medical Bacteriology and Virology, School of Medicine, Antimicrobial Resistance Research Center, Qaem University Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Meshkat
- Department of Medical Bacteriology and Virology, School of Medicine, Antimicrobial Resistance Research Center, Qaem University Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Golnaz Ranjbar
- Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mojtaba Sankian
- Division of Immunobiochemistry, Immunology Research Centre, Bu-Ali Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Kiarash Ghazvini
- Department of Medical Bacteriology and Virology, School of Medicine, Antimicrobial Resistance Research Center, Qaem University Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hadi Farsiani
- Department of Medical Bacteriology and Virology, School of Medicine, Antimicrobial Resistance Research Center, Qaem University Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid R Pourianfar
- Research Department of Industrial Fungi Biotechnology, Research Institute for Industrial Biotechnology, Academic Centre for Education, Culture and Research [ACECR]-Khorasan Razavi Province Branch, Mashhad, Iran
| | - Majid Rezayi
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Chaoui I, Taoudi S, Oudghiri A, Benamor J, Bourkadi J, El Mzibri M. Molecular diagnostics for verification of pleural tuberculosis in Morocco. RUSSIAN JOURNAL OF INFECTION AND IMMUNITY 2020. [DOI: 10.15789/2220-7619-mdo-1399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Pleural tuberculosis (pTB) is a very common form of extrapulmonary tuberculosis (TB). pTB diagnostics represents a major burning challenge worldwide due to the limitations of available conventional diagnostic tools. These latter include microscopic examination of the pleural fluid for acid-fast bacilli, mycobacterial culture of pleural fluid in solid or liquid media, sputum or pleural tissue, and histopathological examination of pleural tissue; these tests have recognized limitations for clinical use. Hence, to overcome these limitations, attention has been devoted to new nucleic acid amplification (NAA) diagnostic tests such as the polymerase chain reaction (PCR) and real-time PCR (RT-PCR), owing to their accuracy, rapidity, high sensitivity and specificity. Within this context, this prospective study was conducted to evaluate the performance of molecular diagnosis methods for differentiation between tuberculosis and non-tuberculosis pleural effusions. Fifty patients with pleural effusion were enrolled in this prospective study in Rabat, Morocco. The efficacy of conventional polymerase chain reaction (PCR) in the diagnostics of tuberculous pleurisy by targeting IS6110 and mycobacterial internal transcribed spacer (MYITS) was evaluated compared to histopathologic examination and culture data. Our results showed that IS6110 PCR could “rule in” pTB, the sensitivity and specificity being 41.6% and 85.7%, respectively. Therefore, the findings confirmed that molecular tests exert a relatively high specificity in EPTB but lower sensitivity, thus a positive test is considered as a pTB case whereas negative one cannot exclude the disease. Although the study was limited by a small sample size, it adds to the body of evidence of usefulness of molecular testing as adjuncts to histopathologic examination for accurate diagnosis of pTB, to treat timely and to avoid the emergence and spread of drug resistant pTB. However, further efforts should be made to increase the sensitivity of NAA methods and to identify the best molecular targets to be useful in clinical practice.
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Acharya B, Acharya A, Gautam S, Ghimire SP, Mishra G, Parajuli N, Sapkota B. Advances in diagnosis of Tuberculosis: an update into molecular diagnosis of Mycobacterium tuberculosis. Mol Biol Rep 2020; 47:4065-4075. [DOI: 10.1007/s11033-020-05413-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 03/28/2020] [Indexed: 01/02/2023]
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Rajani M, Banerjee M. Evaluation of Various Diagnostic Techniques for the Diagnosis of Pulmonary and Extra Pulmonary Tuberculosis at a Tertiary Care Center in North India. Infect Disord Drug Targets 2020; 20:433-439. [PMID: 31928526 DOI: 10.2174/1871526519666191011165702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 09/25/2019] [Accepted: 09/25/2019] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Tuberculosis (TB) is a one of the main causes of mortality and morbidity worldwide. Bactec MGIT (Mycobacteria Growth Indicator Tube) system is a rapid, reliable automated system for early diagnosis of pulmonary and extra pulmonary TB in setups where purchase of expensive instruments is not possible. The present study was thus carried out to evaluate AFB microscopy, culture on Lowenstein Jensen media and micro MGIT system for early and accurate diagnosis of Tuberculosis. METHODS A total of 280 samples were processed for direct AFB smear examination, and culture on micro MGIT and LJ media. The identification of Mycobacterium tuberculosis complex in positive cultures was done by MPT64 Ag card test (BD MGIT TBC Identification Test). RESULTS Out of the processed samples, (47.1%) 132/280 were positive for Mycobacterium spp by Micro MGIT, (35%) 98/280 on LJ medium and (25.7%) 72/280 by AFB smear. A total of (48.5%) 136 samples were positive by a combination of Micro MGIT and LJ medium. Among the total positive samples (136/280), Micro MGIT was found to be positive in 97% (132/136) of samples, LJ was positive in 72% (98/136), while 52.9% (72/136) were positive by AFB smear. CONCLUSION Manual MGIT System is a simple and efficient, safe to use the diagnostic system. It does not require any expensive/special instrumentation other than the UV lamp for the detection of fluorescence. In areas with limited resources where the purchase of expensive instruments such as the MGIT 960 is out of scope, the use of manual MGIT for rapid susceptibility testing for MDR-TB could be an option. We would recommend testing MGIT 960 using first and secondline drugs to determine DST.
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Affiliation(s)
- Monika Rajani
- Career Institute of Medical Sciences And Hospital, IIM Road, Lucknow, India
| | - Molay Banerjee
- Department of Microbiology, Career Institute of Medical Sciences And Hospital, IIM Road, Lucknow, India
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Hasanzadeh Haghighi F, Aryan E, Gholoobi A, Zare H, Meshkat Z. Design and Construction of a Eukaryotic Cloning Vector Encoding the mpt51 Gene of Mycobacterium tuberculosis. Rep Biochem Mol Biol 2019; 8:32-35. [PMID: 31334285 PMCID: PMC6590942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/17/2018] [Indexed: 06/10/2023]
Abstract
BACKGROUND Tuberculosis (TB) is the leading cause of death by infectious diseases worldwide, and especially prevalent in developing countries. Several vaccines against TB have been developed, recently. The aim of the present study was to design and construct a cloning vector encoding Mycobacterium tuberculosis (MTB) mpt51 gene. METHODS DNA was extracted from MTB H37Rv strain. Gene-specific primers were designed using Gene Runner software and the mpt51 gene was amplified by PCR. The amplified fragment and pcDNA3.1(+) cloning vector were both digested with restriction enzymes, the mpt51 fragment was ligated into the vector, and the Escherichia coli (E. coli) TOP10 strain were transformed by the recombinant plasmid. Positive clones were identified by colony PCR, restriction enzyme digestion, and DNA sequencing. RESULTS The mpt51 gene was successfully cloned into pcDNA3.1(+). A 6400 bp band for the pcDNA3.1(+)/mpt51 recombinant plasmid and a 926 bp band for mpt51 were observed by colony PCR, and restriction enzyme digestion on agarose gels. The DNA sequence was 100% homologous with the mpt51 fragment of H37Rv in GenBank. CONCLUSION In the current study, the mpt51 gene of MTB was correctly cloned into pcDNA3.1(+). The expression of this recombinant vector can be studied in eukaryotic cells. Moreover, it is possible to determine the efficacy of this vector as a DNA vaccine candidate, and to test its protective function compared to BCG in animal models in future.
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Affiliation(s)
| | - Ehsan Aryan
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Aida Gholoobi
- Department of Modern Sciences and Technologies, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Hosna Zare
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Zahra Meshkat
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
- Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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DNA markers for tuberculosis diagnosis. Tuberculosis (Edinb) 2018; 113:139-152. [PMID: 30514496 DOI: 10.1016/j.tube.2018.09.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 09/23/2018] [Accepted: 09/27/2018] [Indexed: 02/07/2023]
Abstract
Tuberculosis (TB), caused by Mycobacterium tuberculosis complex (MTBC), is an infectious disease with more than 10.4 million cases and 1.7 million deaths reported worldwide in 2016. The classical methods for detection and differentiation of mycobacteria are: acid-fast microscopy (Ziehl-Neelsen staining), culture, and biochemical methods. However, the microbial phenotypic characterization is time-consuming and laborious. Thus, fast, easy, and sensitive nucleic acid amplification tests (NAATs) have been developed based on specific DNA markers, which are commercially available for TB diagnosis. Despite these developments, the disease remains uncontrollable. The identification and differentiation among MTBC members with the use of NAATs remains challenging due, among other factors, to the high degree of homology within the members and mutations, which hinders the identification of specific target sequences in the genome with potential impact in the diagnosis and treatment outcomes. In silico methods provide predictive identification of many new target genes/fragments/regions that can specifically be used to identify species/strains, which have not been fully explored. This review focused on DNA markers useful for MTBC detection, species identification and antibiotic resistance determination. The use of DNA targets with new technological approaches will help to develop NAATs applicable to all levels of the health system, mainly in low resource areas, which urgently need customized methods to their specific conditions.
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Yar AM, Zaman G, Hussain A, Changhui Y, Rasul A, Hussain A, Bo Z, Bokhari H, Ibrahim M. Comparative Genome Analysis of 2 Mycobacterium Tuberculosis Strains from Pakistan: Insights Globally Into Drug Resistance, Virulence, and Niche Adaptation. Evol Bioinform Online 2018; 14:1176934318790252. [PMID: 30083049 PMCID: PMC6075610 DOI: 10.1177/1176934318790252] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 06/18/2018] [Indexed: 12/02/2022] Open
Abstract
Multidrug-resistant Mycobacterium tuberculosis is a global
threat particularly in developing countries like Pakistan. In this study, we
identified 2 M tuberculosis strains, mnpk and swlpk, by 16S RNA
genes, sequenced their draft genome, and compared the 2 genomes with reference
strain H37Rv and gene expression analysis of selected virulent genes.
Phylogenetic analysis of M tuberculosis strains, mnpk and
swlpk, using 16S RNA genes revealed that the strains are closely related with
reference strain H37Rv. The draft genome sequence of mnpk and swlpk contains
4305 and 4295 protein-coding genes, respectively, having 99.9% with high
collinearity when compared with H37Rv. Although some important drug-resistant
genes such as fabG, faDE24, and
iniA were missing, genome mining also revealed key
drug-resistant genes such as katG, inhA,
rpoA, rpoB, and rpoC
against first-line isoniazid and rifampicin drug. The strain mnpk and swlpk
encodes 257 putative and 86 verified virulent genes including type 7 secretion
system (T7SS) key genes. The variation in the expression profile of selected
T7SS genes, particularly low expression level of EspK, raised
concern that the mechanism of virulence of mnpk and swlpk might be different
from H37Rv strains as espK is associated with ATPase
EccC1a and EccC1b which showed high
expression level. Briefly, this study shows that the strains mnpk and swlpk are
linked with H37Rv having 99% similarity in genomes, but the absence of
drug-resistant genes and variation in key genes’ expression profile
espK, EccE1, PPE41, and
espC provide a rationale for the future investigation of
M tuberculosis mnpk and swlpk pathogenesis via RNA
sequencing, single-nucleotide polymorphisms, as well as gene manipulation.
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Affiliation(s)
- Asma Muhammad Yar
- Genomics and Computational Biology Laboratory, COMSATS University Islamabad, Sahiwal Campus, Pakistan
| | - Ghanva Zaman
- Genomics and Computational Biology Laboratory, COMSATS University Islamabad, Sahiwal Campus, Pakistan
| | - Annam Hussain
- Genomics and Computational Biology Laboratory, COMSATS University Islamabad, Sahiwal Campus, Pakistan
| | - Yan Changhui
- Department of Computer Science, North Dakota State University, Fargo, ND, USA
| | - Azhar Rasul
- Department of Zoology, Government College University, Faisalabad, Pakistan
| | - Abrar Hussain
- Genomics and Computational Biology Laboratory, COMSATS University Islamabad, Sahiwal Campus, Pakistan
| | - Zhu Bo
- Key Laboratory of Urban Agriculture by Ministry of Agriculture of China, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Habib Bokhari
- Laboratories of Microbiology and Public Health, COMSATS University Islamabad, Islamabad, Pakistan
| | - Muhammad Ibrahim
- Genomics and Computational Biology Laboratory, COMSATS University Islamabad, Sahiwal Campus, Pakistan
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Abstract
This manuscript presents a review of infectious causes of gastritis aimed at the practicing anatomic pathologist. We shall highlight unique histologic findings and clinical attributes that will assist those analyzing endoscopically obtained mucosal biopsies of the stomach or resection specimens.
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Mahmudunnabi G, Majlish ANK, Momtaz F, Foysal MJ, Rahman MM, Islam K. Molecular detection and PCR-RFLP analysis using Pst1 and Alu1 of multidrug resistant Klebsiella pneumoniae causing urinary tract infection in women in the eastern part of Bangladesh. J Genet Eng Biotechnol 2018; 16:77-82. [PMID: 30647708 PMCID: PMC6296566 DOI: 10.1016/j.jgeb.2017.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 12/22/2017] [Accepted: 12/29/2017] [Indexed: 11/18/2022]
Abstract
Klebsiella pneumoniae is the second leading causative agent of UTI. In this study, a rapid combined polymerase chain reaction and restriction fragment length polymorphism analysis was developed to identify K. pneumoniae in women, infected with urinary tract infection in the Sylhet city of Bangladesh. Analysis of 11 isolates from women at the age range of 20-55 from three different hospitals were done firstly by amplification with K. pneumoniae specific ITS primers. All of the 11 collected isolates were amplified in PCR and showed the expected 136 bp products. Then, restriction fragment length polymorphism analysis of 11 isolates were conducted after PCR amplification by 16s rRNA universal primers, followed by subsequent digestion and incubation with two restriction enzymes, Pst1 and Alu1. Seven out of 11 isolates were digested by Pst1 restriction enzymes, six isolates digested by Alu1, and while others were negative for both enzymes. Data results reveal that, women at age between 25 and 50 were digested by both enzymes. A woman aged over than 50 was negative while bellow 20 was digested by only Pst1. The results could pave the tactic for further research in the detection of K. pneumoniae from UTI infected women.
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Affiliation(s)
- Golam Mahmudunnabi
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
| | - Al Nahian Khan Majlish
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
| | - Farhana Momtaz
- Department of Microbiology, University of Chittagong, Chittagong 4331, Bangladesh
| | - Md Javed Foysal
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
- School of Molecular and Life Sciences, Curtin University, WA 6845, Australia
| | - Md Mahbubur Rahman
- Department of Biotechnology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
| | - Kamrul Islam
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
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Hasanzadeh Haghighi F, Aryan E, Derakhshan M, Gholoobi A, Meshkat Z. Designing and Construction of a Cloning Vector Encoding mtb32C and mpt51 Fragments of Mycobacterium tuberculosis as a DNA Vaccine Candidate. IRANIAN JOURNAL OF PATHOLOGY 2018; 13:403-407. [PMID: 30774678 PMCID: PMC6358561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 09/13/2018] [Indexed: 11/16/2022]
Abstract
BACKGROUND & OBJECTIVE Tuberculosis (TB) remains a major cause of death around the world. Bacillus Calmette Guérin (BCG) is the only vaccine used in TB prevention that has a protective effect in children, but its effectiveness declines in adults. Design and development of new vaccines is the most effective way against TB.The aim of this study was to design and construct a DNA vaccine encoding mtb32C and mpt51 fusion genes of Mycobacterium tuberculosis. METHODS First, mpt51 fragment was amplified by PCR method. The pcDNA3.1+/mtb32C plasmid was transformed into E. coli JM109 and then extracted. The mpt51 gene and pcDNA3.1+/mtb32C plasmid were both digested with EcoRI and BamHI restriction enzymes followed by ligation of mpt51 fragment into the digested vector. The recombinant plasmid containing mtb32C and mpt51 was subsequently transformed into competent E. coli TOP10 strain. The clones were confirmed by colony-PCR, restriction enzyme digestion and sequencing. RESULTS Using agarose gel electrophoresis, a 926 bp fragment corresponded to mpt51 was observed. Digestion of the vector pcDNa3.1+/mtb32C and mpt51 gene was confirmed by electrophoresis. Then, the pcDNA3.1+/mtb32C plasmid was extracted. Sequencing results confirmed the accuracy of the desired plasmid. CONCLUSION In this study, we constructed a cloning vector encoding mtb32C/mpt51 gene of M. tuberculosis. The eukaryotic expression of this vector can be confirmed in future studies. It can be considered as a DNA vaccine in animal models later. Successful cloning provides a basis for the development of new DNA vaccines against TB.
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Affiliation(s)
| | - Ehsan Aryan
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Derakhshan
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Aida Gholoobi
- Dept. of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Meshkat
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran,Dept. of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran,Corresponding information: Zahra Meshkat, PhD, Antimicrobial Resistance Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad Iran, Dept. of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran E-mail:
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Phillips ACN, Suepaul R, Soto E. Ocular localization of mycobacterial lesions in tank-reared juvenile cobia, Rachycentron canadum. JOURNAL OF FISH DISEASES 2017; 40:1799-1804. [PMID: 28745814 DOI: 10.1111/jfd.12647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 03/24/2017] [Accepted: 03/25/2017] [Indexed: 06/07/2023]
Abstract
Severe clinical mycobacteriosis with consistent ocular lesion localization was diagnosed in a population of 800 juvenile tank-reared Cobia (Rachycentron canadum) which experienced a sudden increase in mortality approximately 5 months after arriving into Trinidad and Tobago from Florida, USA. Moderate daily mortality (15-20 animals per day) persisted for just over 1 month. Moribund fish displayed circling behaviour and had an open-mouth gape upon death. Fish consistently presented with bilateral exophthalmia, corneal cloudiness and hyphema. Non-branching acid-fast rods were detected in aqueous humour touch preparations. Histological analysis revealed severe bilateral intra-ocular granulomatous responses in all specimens. Mycobacterium sp. was identified using a real-time PCR assay detecting the RNA polymerase β-subunit (rpoB) gene in different tissue samples. Specimens did not present with characteristic granulomatous responses usually seen in viscera. To the best of our knowledge, this represents only the third documentation of piscine mycobacterial infection presenting with only localized ocular lesions, and the second documented case of mycobacteriosis in cobia. It is, however, the first documentation of an ocular presentation of mycobacteriosis in a marine species and is the first documentation of such a presentation in cobia.
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Affiliation(s)
- A C N Phillips
- Department of Clinical Veterinary Sciences, Faculty of Medical Sciences, School of Veterinary Medicine, The University of the West Indies, St. Augustine, Trinidad and Tobago, West Indies
| | - R Suepaul
- Department of Basic Veterinary Sciences, Faculty of Medical Sciences, School of Veterinary Medicine, The University of the West Indies, St. Augustine, Trinidad and Tobago, West Indies
| | - E Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA
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20
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A polyaniline-reduced graphene oxide nanocomposite as a redox nanoprobe in a voltammetric DNA biosensor for Mycobacterium tuberculosis. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2184-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Rocchetti TT, Silbert S, Gostnell A, Kubasek C, Campos Pignatari AC, Widen R. Detection of Mycobacterium chelonae, Mycobacterium abscessus Group, and Mycobacterium fortuitum Complex by a Multiplex Real-Time PCR Directly from Clinical Samples Using the BD MAX System. J Mol Diagn 2017; 19:295-302. [DOI: 10.1016/j.jmoldx.2016.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/03/2016] [Accepted: 10/07/2016] [Indexed: 11/16/2022] Open
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22
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de Almeida IN, de Assis Figueredo LJ, Soares VM, Vater MC, Alves S, da Silva Carvalho W, Kritski AL, de Miranda SS. Evaluation of the Mean Cost and Activity Based Cost in the Diagnosis of Pulmonary Tuberculosis in the Laboratory Routine of a High-Complexity Hospital in Brazil. Front Microbiol 2017; 8:249. [PMID: 28261194 PMCID: PMC5309222 DOI: 10.3389/fmicb.2017.00249] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/06/2017] [Indexed: 11/23/2022] Open
Abstract
At a global level, with the increase in healthcare costs, there is a need to assess the economic impact of the incorporation of new technologies in different health disorders in different countries. There is scarce information regarding costs incurred with the use of current or new diagnostic tests for tuberculosis or from the vantage point of their incorporation within the healthcare systems of high-burden countries. The present study aimed to assess the mean cost and the activity based cost of the laboratory diagnosis for tuberculosis by means of conventional techniques and from the Detect TB®LabTest molecular test kit in a general high-complexity hospital of the public health system in Brazil. Cost analysis was performed by means of primary data, collected in the Mycobacteria and Molecular Biology Laboratory in 2013. The mean cost and activity based cost were, respectively, U$10.06/U$5.61 for centrifuged bacilloscopy by Ziehl Neelsen (ZN) and Auramine (AU); U$7.42/U$4.15 for direct bacilloscopy by ZN; U$27.38/U$16.50 for culture in a Loweinstein-Jensen solid medium; and U$115.74/U$73.46 for the Detect TB®LabTest Kit. The calculation of the ABC should be used in making decisions by administrators to be the best method of assessing the costs of conventional techniques and molecular method for providing the real value of the tests. So it is need to calculate the ABC, and not of the mean cost, in various scenarios before incorporating new technologies in health institutions.
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Affiliation(s)
- Isabela N de Almeida
- Research Laboratory in Mycobacteria, School of Medicine of the Federal University of Minas Gerais Belo Horizonte, Brazil
| | - Lida J de Assis Figueredo
- Research Laboratory in Mycobacteria, School of Medicine of the Federal University of Minas Gerais Belo Horizonte, Brazil
| | - Valéria M Soares
- Research Laboratory in Mycobacteria, School of Medicine of the Federal University of Minas Gerais Belo Horizonte, Brazil
| | - Maria C Vater
- Research Center for Tuberculosis, Academic Program in Tuberculosis, School of Medicine of the Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Suely Alves
- Research Center for Tuberculosis, Academic Program in Tuberculosis, School of Medicine of the Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | | | - Afrânio L Kritski
- Research Center for Tuberculosis, Academic Program in Tuberculosis, School of Medicine of the Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Silvana S de Miranda
- Research Laboratory in Mycobacteria, School of Medicine of the Federal University of Minas Gerais Belo Horizonte, Brazil
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Smith AD, Zhang Y, Barber RC, Minshall CT, Huebinger RM, Allen MS. Common Lung Microbiome Identified among Mechanically Ventilated Surgical Patients. PLoS One 2016; 11:e0166313. [PMID: 27898681 PMCID: PMC5127496 DOI: 10.1371/journal.pone.0166313] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 10/26/2016] [Indexed: 11/28/2022] Open
Abstract
The examination of the pulmonary microbiome in patients with non-chronic disease states has not been extensively examined. Traditional culture based screening methods are often unable to identify bacteria from bronchoalveolar lavage samples. The advancement of next-generation sequencing technologies allows for a culture-independent molecular based analysis to determine the microbial composition in the lung of this patient population. For this study, the Ion Torrent PGM system was used to assess the microbial complexity of culture negative bronchoalveolar lavage samples. A group of samples were identified that all displayed high diversity and similar relative abundance of bacteria. This group consisted of Hydrogenophaga, unclassified Bacteroidetes, Pedobacter, Thauera, and Acinetobacter. These bacteria may be representative of a common non-pathogenic pulmonary microbiome associated within this population of patients.
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Affiliation(s)
- Ashley D. Smith
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Center for Biosafety and Biosecurity, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
| | - Yan Zhang
- Center for Biosafety and Biosecurity, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Department of Molecular and Medical Genetics, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
| | - Robert C. Barber
- Department of Molecular and Medical Genetics, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
| | - Christian T. Minshall
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Ryan M. Huebinger
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- * E-mail: (MA); (RH)
| | - Michael S. Allen
- Center for Biosafety and Biosecurity, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- Department of Molecular and Medical Genetics, University of North Texas Health Science Center, Fort Worth, Texas, United States of America
- * E-mail: (MA); (RH)
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Jamshidi Makiani M, Davoodian P, Baghershiroodi M, Nejatizadeh AA, Fakkhar F, Zangeneh M, Jahangiri N. Urine-Based Nested PCR for the Diagnosis of Mycobacterium tuberculosis: A Comparative Study Between HIV-Positive and HIV-Negative Patients. Jundishapur J Microbiol 2016; 9:e35634. [PMID: 27800137 PMCID: PMC5080847 DOI: 10.5812/jjm.35634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 06/28/2016] [Accepted: 07/15/2016] [Indexed: 11/17/2022] Open
Abstract
Background While tuberculosis (TB) can be diagnosed by microscopy and culture, the sensitivity of Ziehl-Neelsen staining is variable and culture results require 4 - 8 weeks to be determined. Polymerase chain reaction (PCR) and its modifications, including nested PCR, might be promising methods for the rapid diagnosis of TB. Objectives This study aimed to evaluate the performance of nested PCR on urine samples of human immunodeficiency virus (HIV)-positive and -negative patients with different manifestations of clinical TB. Methods In a prospective study, three early-morning urine samples from 100 patients with pulmonary TB (PTB) or extrapulmonary TB (EPTB) were evaluated using a molecular target with insertion element IS6110, specific to the Mycobacterium tuberculosis genome, and nested PCR was performed. The results were analyzed with SPSS version 22. Results A total of 100 patients, including 74 (74%) with PTB and 26 (26%) with EPTB, were enrolled. Positive smears were seen in 38 patients (38%). Lymph nodes were the most commonly involved organ in 14 of the 26 (53.8%) EPTB patients (13.5%). Seven (23.1%) of the EPTB patients were HIV-positive. Urine PCR was positive in only 28 patients (28%). Seven HIV-positive patients with PTB showed positive urine PCR results. Moreover, PCR results were positive in only one of the seven HIV-positive subjects with EPTB. Positive PCR results were found in 20 of the 73 HIV-negative patients (27.4%) and in 8 of the 27 HIV-positive patients (29.6%). Therefore, there was no significant difference between the HIV-negative and HIV-positive patients for urine PCR (sensitivity 29.6%, specificity 72.6%; positive and negative predictive values 28% and 72%, respectively; P = 0.138). Conclusions Nested PCR showed the same sensitivity in HIV-positive and HIV-negative patients. It can be applied as a rapid technique for the diagnosis of TB.
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Affiliation(s)
- Mahin Jamshidi Makiani
- Antimicrobial Resistance Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Parivash Davoodian
- Infectious Disease Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
| | - Mahnaz Baghershiroodi
- Cellular & Molecular Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
| | - Abdol Azim Nejatizadeh
- Infectious Disease Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
- Cellular & Molecular Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, IR Iran
| | - Farideh Fakkhar
- Bandar Abbas Health Center, TB control center, Hormozagan University of Medical Sciences, Bandar Abbas, IR Iran
| | - Mehrangiz Zangeneh
- Department of Infectious Disease, Tehran Medical Branch, Islamic Azad University, Tehran, IR Iran
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, IR Iran
- Corresponding author: Mehrangiz Zangeneh, Department of Infectious Disease, Tehran Medical Branch, Islamic Azad University, Tehran, IR Iran. Tel: +98-2122618550, Fax: +98-2155346301, E-mail:
| | - Nadia Jahangiri
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, IR Iran
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How Should We Manage Latent Tuberculosis Infection in Patients Receiving Anti-TNF-α Drugs: Literature Review. IRANIAN RED CRESCENT MEDICAL JOURNAL 2016. [DOI: 10.5812/ircmj.27756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Moradi B, Sankian M, Amini Y, Meshkat Z. Construction of a Novel DNA Vaccine Candidate Encoding an HspX-PPE44-EsxV Fusion Antigen of Mycobacterium tuberculosis. Rep Biochem Mol Biol 2016; 4:89-97. [PMID: 27536702 PMCID: PMC4986267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 01/12/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Mycobacterium tuberculosis is the causative agent of tuberculosis (TB). Bacille Calmette-Guerin (BCG) vaccine, is not effective in adults, therefore, many efforts have been made to produce an effective adult TB vaccine. The aim of this study was to develop a new tuberculosis DNA vaccine candidate encoding a recombinant HspX-PPE44-EsxV fusion antigen of M. tuberculosis. METHODS A fusion DNA segment consisting of HspX, linker, PPE44, linker, and EsxV, after codon optimization, was designed. The fusion DNA was cloned and its sequence confirmed. Then, expression of a recombinant pcDNA3.1 (+)/HspX-PPE44-EsxV plasmid in Chinese hamster ovary (CHO) cells was verified by RT-PCR and Western-blot analysis. RESULTS A 1968 bp band in RT-PCR and a 68 kDa band on Western-blot analysis confirmed transcription and expression of recombinant hspX-ppe44-esxV in eukaryotic cells. CONCLUSION A recombinant DNA segment encoding the HspX-PPE44-EsxV fusion antigen of M. tuberculosis was constructed and considered to be tested as a new TB DNA vaccine candidate.
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Affiliation(s)
- Bagher Moradi
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mojtaba Sankian
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Yousef Amini
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Meshkat
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Baghani A, Youssefi M, Safdari H, Teimourpour R, Meshkat Z. Designing and Construction Pcdna3.1 Vector Encoding Cfp10 Gene of Mycobacterium tuberculosis. Jundishapur J Microbiol 2015; 8:e23560. [PMID: 26587210 PMCID: PMC4644269 DOI: 10.5812/jjm.23560] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 03/04/2015] [Accepted: 04/25/2015] [Indexed: 11/16/2022] Open
Abstract
Background: Pathogenic mycobacteria are a major cause of human morbidity and mortality. Mycobacterium tuberculosis is an etiological agent of human tuberculosis (TB). Designing new vaccines, including DNA vaccines, may be a useful strategy for preventing TB. Objectives: The purpose of this study was to design and construct an eukaryotic expression vector containing M. tuberculosis. Materials and Methods: Genomic DNA of M. tuberculosis H37Rv cultured on Lowenstein Jensen medium was extracted, and cfp10 was amplified by PCR. After digesting the PCR product and the plasmid, the cfp10 fragment was ligated into the vector pcDNA3.1 (+). Correct insertion was confirmed by colony PCR, restriction enzyme digestion, and sequencing. Results: Electrophoresis of the PCR product on gel showed a 303-bp target fragment. Colony PCR, restriction enzyme digestion, and Sequencing methods confirmed the accuracy of the gene cloning. Colony PCR and restriction enzyme digestion confirmed the cloning. Conclusions: Cloning of cfp10 of M. tuberculosis into an eukaryotic expression vector was performed successfully. We propose this recombinant plasmid for inducing immunity in animal models in future studies. This recombinant vector can also be used in the construction of fusion proteins.
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Affiliation(s)
- Akram Baghani
- Antimicrobial Resistance Research Center, Bu Ali Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran
| | - Masoud Youssefi
- Antimicrobial Resistance Research Center, Bu Ali Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran
| | - Hadi Safdari
- Antimicrobial Resistance Research Center, Bu Ali Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran
| | - Roghayeh Teimourpour
- Antimicrobial Resistance Research Center, Bu Ali Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran
| | - Zahra Meshkat
- Antimicrobial Resistance Research Center, Bu Ali Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran
- Corresponding author: Zahra Meshkat, Antimicrobial Resistance Research Center, Bu Ali Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran. Tel: +98-5138012453, Fax: +98-5138002287, E-mail:
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