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https://www.readbyqxmd.com/read/28081227/diagnostic-accuracy-of-genexpert-mtb-rif-assay-in-comparison-to-conventional-drug-susceptibility-testing-method-for-the-diagnosis-of-multidrug-resistant-tuberculosis
#1
Pratikshya Pandey, Narayan Dutt Pant, Komal Raj Rijal, Bhawana Shrestha, Sirita Kattel, Megha Raj Banjara, Bhagwan Maharjan, Rajendra Kc
Xpert MTB/RIF assay is regarded as a great achievement of modern medicine for the rapid diagnosis of multidrug-resistant tuberculosis (MDR-TB). The main purpose of this study was to determine the performance of Xpert MTB/RIF assay compared to conventional drug susceptibility testing (DST) method for the diagnosis of MDR-TB. A comparative cross sectional study was carried out at German-Nepal Tuberculosis Project, Kathmandu, Nepal, from April 2014 to September 2014. A total of 88 culture positive clinical samples (83 pulmonary and 5 extra-pulmonary) received during the study period were analyzed for detection of multidrug-resistant tuberculosis by both GeneXpert MTB/RIF assay and conventional DST method...
2017: PloS One
https://www.readbyqxmd.com/read/28077517/two-phase-hospital-associated-outbreak-of-mycobacterium-abscessus-investigation-and-mitigation
#2
Arthur W Baker, Sarah S Lewis, Barbara D Alexander, Luke F Chen, Richard J Wallace, Barbara A Brown-Elliott, Pamela J Isaacs, Lisa C Pickett, Chetan B Patel, Peter K Smith, John M Reynolds, Jill Engel, Cameron R Wolfe, Carmelo A Milano, Jacob N Schroder, Robert D Davis, Matthew G Hartwig, Jason E Stout, Nancy Strittholt, Eileen K Maziarz, Jennifer Horan Saullo, Kevin C Hazen, Richard J Walczak, Ravikiran Vasireddy, Sruthi Vasireddy, Celeste M McKnight, Deverick J Anderson, Daniel J Sexton
BACKGROUND: Nontuberculous mycobacteria (NTM) commonly colonize municipal water and cause healthcare-associated outbreaks. We investigated a biphasic outbreak of Mycobacterium abscessus at a tertiary care hospital. METHODS: Case patients had recent hospital exposure and laboratory-confirmed colonization or infection with M. abscessus from January 2013 through December 2015. We conducted a multidisciplinary epidemiologic, field, and laboratory investigation. RESULTS: The incidence rate of M...
January 11, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28076350/emergence-of-rare-species-of-nontuberculous-mycobacteria-as-potential-pathogens-in-saudi-arabian-clinical-setting
#3
Bright Varghese, Mushira Enani, Mohammed Shoukri, Sahar AlThawadi, Sameera AlJohani, Sahal Al-Hajoj
BACKGROUND: Clinical relevance of nontuberculous mycobacteria (NTM) is increasing worldwide including in Saudi Arabia. A high species diversity of NTM's has been noticed in a recent study. However, the identification in diagnostic laboratories is mostly limited to common species. The impact of NTM species diversity on clinical outcome is so far neglected in most of the clinical settings. METHODOLOGY/PRINCIPAL FINDINGS: During April 2014 to September 2015, a nationwide collection of suspected NTM clinical isolates with clinical and demographical data were carried out...
January 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28063416/nontuberculous-mycobacterial-infection-in-rheumatoid-arthritis-patients-a-single-center-experience-in-south-korea
#4
Doo-Ho Lim, Yong-Gil Kim, Tae Sun Shim, Kyung-Wook Jo, Byeongzu Ghang, Soo Min Ahn, Seokchan Hong, Chang-Keun Lee, Bin Yoo
Background/Aims: Nontuberculous mycobacteria (NTM) infection has been increasing worldwide in both general population and immunocompromised patients, which has also been reported in rheumatoid arthritis (RA) patients. This study aimed to identify the incidence and clinical characteristics of NTM infection in RA patients living in tuberculosis (TB) infection endemic area. Methods: We performed a retrospective analysis of NTM infection cases in our RA registry at a tertiary referral center from January 1995 to December 2013...
January 6, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28061885/diagnostic-yield-of-nontuberculous-mycobacteria-in-patients-booked-for-endoscopy-at-the-university-teaching-hospital-lusaka
#5
Gershom Chongwe, Charles Michelo, Paul Kelly
BACKGROUND: The intestinal carriage of nontuberculous mycobacteria (NTM) is associated with disease, especially in severely immunocompromised individuals. These organisms, although often considered contaminants, have been known to cause various types of illnesses. We aimed to determine the prevalence of and associated factors for NTM among patients booked for colonoscopy at the University Teaching Hospital (UTH) in Lusaka. METHODS: We randomly recruited 97 patients attending routine endoscopy procedures between November 2012 and October 2013 and after consent, administered a structured questionnaire...
January 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28056937/characteristics-associated-with-progression-in-patients-with-of-nontuberculous-mycobacterial-lung-disease-a-prospective-cohort-study
#6
Soo Jung Kim, Soon Ho Yoon, Sun Mi Choi, Jinwoo Lee, Chang-Hoon Lee, Sung Koo Han, Jae-Joon Yim
BACKGROUND: Patients with distinctive morphotype were more susceptible to nontuberculous mycobacterial lung disease (NTM-LD). However, little is known about the association between body morphotype and progression of NTM-LD. The aim of this study was to elucidate predictors of NTM-LD progression, focusing on body morphotype and composition. METHODS: Data from patients with NTM-LD who participated in NTM cohort which started in 1 July 2011 were analyzed. Patients with more than 6 months of follow up were included for analysis...
January 5, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28050369/a-case-of-surgical-site-infection-caused-by-mycobacterium-fortuitum-following-herniorrhaphy
#7
N S Madhusudhan, A Malini, Mima Maychet B Sangma
Rapidly Growing Mycobacteria (RGM) are opportunistic pathogens found in the environment. Mycobacterium fortuitum, M. chelonae and M.abscessus are the important human pathogens of this group. They cause wound infections, disseminated cutaneous disease, pulmonary infection in patients with cystic fibrosis or bronchiectasis, bone and joint infections and keratitis. Infections due to these Non-Tuberculous Mycobacteria (NTM) are increasingly reported. Post laparoscopic wound infections, mesh site infections and other surgical site infections due to M...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28045086/comparative-genome-analyses-of-mycobacterium-avium-reveal-genomic-features-of-its-subspecies-and-strains-that-cause-progression-of-pulmonary-disease
#8
Kei-Ichi Uchiya, Shuta Tomida, Taku Nakagawa, Shoki Asahi, Toshiaki Nikai, Kenji Ogawa
Pulmonary disease caused by nontuberculous mycobacteria (NTM) is increasing worldwide. Mycobacterium avium is the most clinically significant NTM species in humans and animals, and comprises four subspecies: M. avium subsp. avium (MAA), M. avium subsp. silvaticum (MAS), M. avium subsp. paratuberculosis (MAP), and M. avium subsp. hominissuis (MAH). To improve our understanding of the genetic landscape and diversity of M. avium and its role in disease, we performed a comparative genome analysis of 79 M. avium strains...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28043629/nontuberculosis-mycobacteria-isolation-from-clinical-samples-in-iraq
#9
Shatha T Ahmed, Ahmed A Alsudani, Ruqaya M Ali, Batool A Shihab, Sana A Hussein
OBJECTIVE/BACKGROUND: Nontuberculosis mycobacteria (NTM), defined as any mycobacterial strain other than Mycobacterium tuberculosis complex, are a diverse group of pathogens that cause a substantive, but often unappreciated worldwide burden of illness. NTM cause illness similar to M. tuberculosis, but generally do not respond to classic tuberculosis (TB) drug regimens. Here, we evaluated GenoType Mycobacterium CM/AS (Hain Lifesciences) for rapid identification of NTM and compared its results with those of other biochemical tests...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043577/mycobacterium-haemophilum-a-report-of-cutaneous-infection-in-a-patient-with-end-stage-renal-disease
#10
Shahram Sabeti, Mahsa Pourabdollah Tootkaboni, Mitra Abdolahi, Mihan Pourabdollah
INTRODUCTION: Mycobacterium haemophilum is a slow-growing nontuberculous mycobacterium (NTM) that can cause ulcerating cutaneous or subcutaneous nodular skin lesions in immunocompromised and immunocompetent patients. Acid-fast staining cannot distinguish NTM from M. tuberculosis; culturing at two temperatures with iron-supplemented media and polymerase chain reaction (PCR) are needed for optimal detection of M. haemophilum. CASE PRESENTATION: A 32-year-old man with end-stage renal disease, undergoing hemodialysis twice a week, presented with multiple, painless, nonpruritic nodular lesions...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043562/identification-of-nontuberculous-mycobacteria-by-high-performance-liquid-chromatography-from-patients-in-tehran
#11
Ali Mirzapour, Ali Nazari Alam, Saeed Z Bostanabadi, Abdolrazagh H Shahraki, Soltan A Ebrahimi, Masoud Yousefi
BACKGROUND/OBJECTIVES: The genus Mycobacterium contains over 140 species comprises pathogenic and nonpathogenic strains. Nontuberculous mycobacteria (NTM) causing clinical disease have become increasingly common and more diverse. Widespread features of NTM infection can make the diagnosis difficult. Precise species-level detection can aid in distinguishing environmental contamination from actual infection and, furthermore, can assist in making a choice of antimicrobial therapy. MATERIALS AND METHODS: Mycolic acids extracted from saponified mycobacterial cells were examined by high performance liquid chromatography (HPLC) in addition to phenotypic tests for the identification of 20 clinical isolates of mycobacteria at Masoud Laboratory during 2014-2015...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043561/identification-of-different-subtypes-of-rapid-growing-atypical-mycobacterium-from-water-and-soil-sources-using-pcr-rflp-using-hsp65-and-rrna-16s-23s-genes
#12
Mohammad Varahram, Parissa Farnia, Shima Saif, Mehran Marashian, Poopak Farnia, Jaladein Ghanavi, Ali Akbar Velayati
OBJECTIVE/BACKGROUND: Nontuberculosis mycobacteria (NTM) are a diverse group of microorganisms that cause a variety of diseases in humans including skin, respiratory, and gastrointestinal tract infection. Generally, NTM are classified into two categories: rapid (<7days) and slow growing (>7days). In this study, we aimed to investigate NTM frequency and prevalence in environmental samples. Additionally, we tried to identify various subtypes of isolated rapid growing mycobacteria (RGM)...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043560/the-importance-of-single-nucleotide-polymorphisms-in-interferon-gamma-receptor-1-gene-in-pulmonary-patients-infected-with-rapid-grower-mycobacterium
#13
Poopak Farnia, Jalaledin Ghanavi, Payam Tabasri, Shima Saif, Ali Akbar Velayati
OBJECTIVE/BACKGROUND: Interferon gamma (IFN-γ) plays a key role in protective immune response against Mycobacterial infection. IFN-γ excretes its antimycobacterial effectors mechanisms by activation of macrophages and dendritic cells via interaction with its receptor complex, that is, a ligand-binding subunit [IFN-γ receptor (IFNGR)1] and an accessory subunit (IFNGR2) on the cell surface. It has been shown that individuals with complete or partial IFNGR1 receptor deficiency are highly susceptible to infection by nontuberculous mycobacteria (NTM), Mycobacterium tuberculosis, and some Salmonella species...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043558/comparison-of-histopathology-acid-fast-bacillus-smear-and-real-time-polymerase-chain-reaction-for-detection-of-mycobacterium-tuberculosis-in-anal-fistula-in-161-patients-a-prospective-controlled-trial
#14
Pankaj Garg, Mohinder K Garg, Narinder Agarwal
OBJECTIVE/BACKGROUND: Mycobacterium tuberculosis (MTB) is a known cause of refractory and recurrent fistula-in-ano. Histopathology of fistula tract and acid fast bacillus (AFB) smear of the pus are the standard procedures employed to diagnose MTB. However, they have some drawbacks. Nontubercular mycobacteria (NTM) has also been detected to cause fistula-in-ano and these methods cannot differentiate between MTB and NTM. Secondly, as these methods have low sensitivity, they could possibly be missing out MTB patients...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043548/discordance-between-genexpert-assay-and-conventional-drug-susceptibility-testing-in-detecting-rifampicin-resistant-tuberculosis-a-perspective-of-the-line-probe-assay
#15
Ruqaya M Ali, Ahmed A Alsudani
BACKGROUND: Early detection for tuberculosis (TB) and rifampicin-resistant TB (RRTB) is crucial for proper control of this disease. WHO recommended the use of the GeneXpert assay at district level to cover these two public health demands? A study evaluated the diagnostic impact of the GeneXpert assay in detecting TB and RRTB. Odd results were observed in this study in the form of discordance between the GeneXpert assay and the conventional culture and drug-susceptibility testing (DST)...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043534/nontubercular-mycobacteria-ntm-in-fistula-in-ano-a-new-finding-and-its-implications
#16
Pankaj Garg, Mohinder Kumar Garg, Narinder Agarwal
OBJECTIVE/BACKGROUND: Nontubercular mycobacteria (NTM) is not known to be associated with fistula-in-ano. METHODS: A total of 311 consecutive fistula-in-ano patients operated on over 2years were analyzed. The histopathology of fistula-in-ano tract lining was performed in all the cases and other tests [real-time polymerase chain-reaction (RT-PCR), Gene Xpert, mycobacterial culture] were completed in patients with a high index of suspicion of having mycobacterial disease...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28017547/a-systematic-review-of-waterborne-infections-from-nontuberculous-mycobacteria-in-health-care-facility-water-systems
#17
Trudy Li, Lydia S Abebe, Ryan Cronk, Jamie Bartram
Healthcare-acquired infections are an increasing problem for health care providers and policy makers. Water is an overlooked source of infectious microorganisms in health care facilities. Waterborne nontuberculous mycobacteria (NTM) are ubiquitous, and particularly problematic in health care facility water systems, and cause a variety of diseases. The purpose of this review is to assess health care associated NTM infections from health care facility water systems. We documented susceptible populations, modes of transmission, and the median attack rate (e...
December 19, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28012493/analysis-of-the-impact-of-lung-cancer-treatment-on-nontuberculous-mycobacterial-lung-diseases
#18
Taisuke Tsuji, Kazunari Tsuyuguchi, Kazunobu Tachibana, Yohei Kimura, Takehiko Kobayashi, Shojiro Minomo, Shinji Atagi, Akihide Matsumura, Seiji Hayashi, Katsuhiro Suzuki
BACKGROUND: Although nontuberculous mycobacteria (NTM) lung diseases can occur in association with lung cancer, no study has evaluated the effect of lung cancer treatment on NTM lung diseases. Therefore, the present study aimed to retrospectively examine the effect of lung cancer treatment on NTM lung diseases. METHODS: Patients diagnosed with NTM lung diseases in combination with cytologically or histologically proven lung cancer between January 1, 2010 and October 31, 2014 were enroled...
January 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/28011973/pulmonary-and-vertebral-mycobacterium-avium-disease-in-a-hiv-negative-71-year-old-man-a-case-report
#19
Mihailo I Stjepanovic, Dragica P Pesut, Aleksandar R Lesic, Ruza S Stevic
Nontuberculous mycobacteria (NTM) caused pulmonary disease is on increase worldwide, especially in countries with decreasing time trend of tuberculosis incidence. NTM skeletal affection is rare. Mycobacterium avium related disease, with still unclear clinical and radiologic features, is in current focus of both clinicians and researchers. An exhausted severely ill 71-year-old man was admitted on emergency due to cough, dyspnea and lumbar back pain to be diagnosed with terminal phase M. avium disease. Three sputum smears were positive for acid fast bacilli and M...
1, 2016: Le Infezioni in Medicina
https://www.readbyqxmd.com/read/28003422/maldi-tof-for-combined-species-identification-and-drug-sensitivity-testing-in-mycobacteria
#20
Pieter-Jan Ceyssens, Karine Soetaert, Markus Timke, An Van den Bossche, Katrin Sparbier, Koen De Cremer, Markus Kostrzewa, Marijke Hendrickx, Vanessa Mathys
Species identification and drug susceptibility testing (DST) of mycobacteria is an important yet complex process, traditionally reserved for reference laboratories. Recent technical improvements in MALDI-TOF MS started to facilitate routine mycobacterial identifications in clinical laboratories. In this paper, we investigate the possibility to perform phenotypic MALDI-based DST in mycobacteriology, using the recently described MALDI Biotyper antibiotic susceptibility test rapid assay (MBT-ASTRA™). We randomly selected 72 clinical M...
December 21, 2016: Journal of Clinical Microbiology
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