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https://www.readbyqxmd.com/read/28190461/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
#1
Talita T Rocchetti, Suzane Silbert, Alicia Gostnell, Carly Kubasek, Antonio C Campos Pignatari, Raymond Widen
A new multiplex PCR test was designed to detect Mycobacterium chelonae, Mycobacterium abscessus group, and Mycobacterium fortuitum complex on the BD MAX System. A total of 197 clinical samples previously submitted for mycobacterial culture were tested using the new protocol. Samples were first treated with proteinase K, and then each sample was inoculated into the BD MAX Sample Buffer Tube. Extraction and multiplex PCR were performed by the BD MAX System, using the BD MAX ExK TNA-3 extraction kit and BD TNA Master Mix, along with specific in-house designed primers and probes for each target...
March 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28182700/pilot-double-blind-randomized-placebo-controlled-clinical-trial-of-the-supplement-food-nyaditum-resae%C3%A2-in-adults-with-or-without-latent-tb-infection-safety-and-immunogenicity
#2
Eva Montané, Ana Maria Barriocanal, Ana Lucía Arellano, Angelica Valderrama, Yolanda Sanz, Nuria Perez-Alvarez, Paula Cardona, Cristina Vilaplana, Pere-Joan Cardona
BACKGROUND: Nyaditum resae® (NR) is a galenic preparation of heat-killed Mycobacterium manresensis, a new species of the fortuitum complex, that is found in drinkable water, and that has demonstrated to protect against the development of active TB in a murine experimental model that develop human-like lesions. METHODS: Double-blind, randomized, placebo-controlled Clinical Trial (51 volunteers included). Two different doses of NR and a placebo were tested, the randomization was stratified by Latent Tuberculosis Infection (LTBI)-positive (n = 21) and LTBI-negative subjects (n = 30)...
2017: PloS One
https://www.readbyqxmd.com/read/28095429/high-rates-of-non-tuberculous-mycobacteria-isolation-in-mozambican-children-with-presumptive-tuberculosis
#3
Elisa López-Varela, Alberto L García-Basteiro, Orvalho J Augusto, Oscar Fraile, Helder Bulo, Tasmiya Ira, Kizito Gondo, Jakko van Ingen, Denise Naniche, Jahit Sacarlal, Pedro L Alonso
INTRODUCTION: Non-tuberculous mycobacteria (NTM) can cause disease which can be clinically and radiologically undistinguishable from tuberculosis (TB), posing a diagnostic and therapeutic challenge in high TB settings. We aim to describe the prevalence of NTM isolation and its clinical characteristics in children from rural Mozambique. METHODS: This study was part of a community TB incidence study in children <3 years of age. Gastric aspirate and induced sputum sampling were performed in all presumptive TB cases and processed for smear testing using fluorochrome staining and LED Microscopy, liquid and solid culture, and molecular identification by GenoType® Mycobacterium CM/AS assays...
2017: PloS One
https://www.readbyqxmd.com/read/28091937/ocular-mycobacteriosis-dual-infection-of-m-tuberculosis-complex-with-m-fortuitum-and-m-bovis
#4
Kusum Sharma, Natasha Gautam, Megha Sharma, Mohit Dogra, Priya Bajgai, Basavaraj Tigari, Aman Sharma, Vishali Gupta, Surya Prakash Sharma, Ramandeep Singh
BACKGROUND: We report unfavorable outcome in a patient with subretinal granuloma caused by dual infection of Mycobacterium tuberculosis complex with Mycobacterium fortuitum and Mycobacterium bovis in an immunosuppressed, non-HIV patient. We did a systematic review of literature on dual infection due to M. tuberculosis and M. fortuitum via MEDLINE and PUBMED and could not find any case reported of causing this kind of dual infection in the eye. RESULTS: A 38-year-old Indian male patient presented with decreased vision in the left eye for 3 months, diagnosed as tubercular choroidal granuloma with associated retinal angiomatosis proliferans (RAP) lesion...
December 2017: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/28061952/anti-mycobacterial-function-of-macrophages-is-impaired-in-a-diet-induced-model-of-type-2-diabetes
#5
Md Abdul Alim, Suchandan Sikder, Tahnee L Bridson, Catherine M Rush, Brenda L Govan, Natkunam Ketheesan
Type 2 diabetes (T2D) is one of the major risk factors for tuberculosis (TB). In this study, a diet induced murine model of T2D (DIMT2D) was developed and characterized in the context of metabolic, biochemical and histopathological features following diet intervention. Mycobacterial susceptibility was investigated using Mycobacterium fortuitum as a surrogate. Phagocytic capability of alveolar macrophages and resident peritoneal macrophages were determined by in vitro assays using mycolic acid coated beads and M...
January 2017: Tuberculosis
https://www.readbyqxmd.com/read/28050369/a-case-of-surgical-site-infection-caused-by-mycobacterium-fortuitum-following-herniorrhaphy
#6
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/28043562/identification-of-nontuberculous-mycobacteria-by-high-performance-liquid-chromatography-from-patients-in-tehran
#7
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
#8
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
#9
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/28043553/frequency-of-mycobacterial-infections-in-retailed-fish-in-karaj-an-iranian-perspective
#10
Atefeh Mobasher-Amini, Nader Mosavari, Mehdi Ghiami-Rad, Keyvan Tadayon
OBJECTIVE/BACKGROUND: Mycobacterium species comprise one of the most frequently-reported causative agents in granulomatous lesions of fish. Also, mycobacteria have been documented as fish-born zoonoses. Ornamental aquaria, commercial aquaculture, and wild fisheries therefore produce a potential risk of infection for humans through physical contact and consumption of fishes. A number of fish mycobacteriosis and fish-born zoonotic cases have been reported to date in Iran. METHODS: In order to examine the frequency of mycobacteria existence in fish supplied to the public in seafood retail outlets, whole fresh fish from cold water (n=50) and tropical (n=50) audible fish were obtained from five stores in Karaj, the central city of Alborz province...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043488/development-of-the-food-supplement-nyaditum-resae-as-a-new-tool-to-reduce-the-risk-of-tuberculosis-development
#11
Nestani Tukvadze, Paula Cardona, Sergo Vashakidze, Natalia Shubladze, Zaza Avaliani, Cris Vilaplana, Pere-Joan Cardona
Nyaditum resae (NR) is a galenic preparation of heat-killed Mycobacterium manresensis (hkMn). This is a new species that belongs to the Mycobacterium fortuitum complex, and it is present in drinking water-thus, regulatorily speaking, it is considered a food supplement. Preclinical studies in the murine model of active tuberculosis (TB) in the C3HeB/FeJ strain have demonstrated that daily administration of NR containing 10(3)-10(6)hkMn for 14days was able to stop the progression toward active TB [1]. The mechanism of action was linked to the induction of low dose tolerance and was related to the increase of Tuberculin Purified Protein Derivative (PPD) memory-specific Tregs (CD4(+)CD25(+)CD39(+) cells) after ex vivo incubation of splenocytes for 7days...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28036317/complicated-skin-and-soft-tissue-infection-with-mycobacterium-fortuitum-following-excision-of-a-sebaceous-cyst-in-taiwan
#12
Shih-Chen Tsai, Li-Hsin Chen, Hsien-Hua Liao, Chih-Yu Chiang, Wea-Lung Lin, Shiuan-Chih Chen, Shih-Ming Tsao, Hung-Chang Hung, Yuan-Ti Lee
Mycobacterium fortuitum group (M. fortuitum), also known as rapidly growing Mycobacteria, can cause pyogenic infections in human beings, most commonly in immunocompromised patients. Herein, we present a 40-year-old immunocompetent male patient who underwent planned excision of a sebaceous cyst in the abdominal wall. He suffered from tender erythematous lesions with purulent discharge around the healing wound that developed 2 weeks after surgery. Gram stain, bacterial and fungal culture results of the wound were negative...
December 30, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28035314/granulomatous-lobular-mastitis-secondary-to-mycobacterium-fortuitum
#13
Armin Kamyab
Granulomatous lobular mastitis is a rare inflammatory disease of the breast of unknown etiology. Most present as breast masses in women of child-bearing age. A 29-year-old female presented with a swollen, firm and tender right breast, initially misdiagnosed as mastitis. Core needle biopsy revealed findings consistent with granulomatous lobular mastitis, and cultures were all negative for an infectious etiology. She was started on steroid therapy to which she initially responded well. A few weeks later she deteriorated and was found to have multiple breast abscesses...
December 16, 2016: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/27984057/optimizing-of-a-protein-extraction-method-for-mycobacterium-tuberculosis-proteome-analysis-using-mass-spectrometry
#14
Marie Sylvianne Rabodoarivelo, Maarten Aerts, Peter Vandamme, Juan Carlos Palomino, Voahangy Rasolofo, Anandi Martin
A critical step in proteomic analyses comprises the implementation of a reliable cell lysis method with high yields of qualitative proteins. In Mycobacteria, the protein extraction step is often hampered by the thick waxy cell wall which is rich in mycolic acids. Harsh disruption techniques to release proteins from the cells are thus required. Here, we demonstrate an optimized protein extraction procedure for Mycobacterium tuberculosis (Mbt) that results in protein extracts that are useful for all currently used proteomics platforms, including gel and LC-MS based strategies...
October 27, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27981216/cutaneous-atypical-mycobacterial-infection-with-mycobacterium-fortuitum-arising-after-endovenous-radiofrequency-ablation
#15
Andrew J DeCrescenzo, Anna F Buteau, Elizabeth R Schepp, Michael G Wilkerson
No abstract text is available yet for this article.
November 2016: JAAD Case Reports
https://www.readbyqxmd.com/read/27934821/drug-susceptibility-of-rapid-and-slow-growing-non-tuberculous-mycobacteria-isolated-from-symptomatics-for-pulmonary-tuberculosis-central-india
#16
B Goswami, P Narang, P S Mishra, R Narang, U Narang, D K Mendiratta
BACKGROUND: Non-tuberculous mycobacteria (NTM) are emerging as important pathogens. Their treatment also differs from that of Mycobacterium tuberculosis. In India, any datum on them is scarce as species identification and drug susceptibility are not performed in most laboratories. Susceptibility also differs from one geographic area to another, and in our country, there are no data even to guide the clinicians to start treatment empirically. METHODOLOGY: The present study endeavours to generate drug susceptibility data on NTM isolated from sputum samples collected and stored from 6445 symptomatics for pulmonary tuberculosis during a prevalence survey and from specimens received from the hospital...
October 2016: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27918379/nontuberculous-mycobacteria-in-children-a-focus-on-bloodstream-infections
#17
Laila S Al Yazidi, Ben J Marais, Briony Hazelton, Alexander Outhred, Alison Kesson
BACKGROUND: Nontuberculous mycobacteria (NTM) are ubiquitous organisms with variable disease-causing potential. Bloodstream infections caused by NTM in children are poorly described. METHODS: We describe a retrospective case series of children with culture-confirmed mycobacterial disease managed at The Children's Hospital at Westmead from July 2005 - June 2015. RESULTS: Sixty-five patients had 149 positive NTM cultures; 55 (83.0%) episodes in 54 patients were considered clinically significant...
December 1, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27904603/prevalence-of-nontuberculous-mycobacteria-isolated-from-environmental-samples-in-iran-a-meta-analysis
#18
REVIEW
Azad Khaledi, Abbas Bahador, Davood Esmaeili, Alireza Tafazoli, Kiarash Ghazvini, Davood Mansury
BACKGROUND: While the most nontuberculous mycobacteria (NTMs) species are considered as opportunistic pathogens, some of them are related to several human infections. It is believed that environment is the main source for these infections. Distribution and scattering pattern of NTMs has not been well studied in Iran and a few studies about this subject have been done, so the aim of this study was to determine prevalence of NTMs in environmental samples from Iran. MATERIALS AND METHODS: Data about prevalence of NTMs in environmental samples from Iran were obtained by searching databases...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27890417/mycobacterium-fortuitum-empyema-associated-with-an-indwelling-pleural-catheter-case-report-and-review-of-the-literature
#19
Paul Blair, Mahdi Moshgriz, Marc Siegel
Mycobacterium fortuitum is a rapidly growing mycobacterium (RGM) that is an uncommon cause of healthcare-associated infections. The most common infections caused by M. fortuitum include skin, soft tissue, and catheter-related infections. Although occasionally cultured from sputum samples, M. fortuitum is a rare cause of pulmonary disease. We report a case of M. fortuitum empyema associated with an infected pleural catheter and review M. fortuitum pulmonary infections.
November 24, 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/27887611/the-performance-of-interferon-gamma-release-assay-in-nontuberculous-mycobacterial-diseases-a-retrospective-study-in-china
#20
Mao-Shui Wang, Jun-Li Wang, Xin-Feng Wang
BACKGROUND: The interferon-gamma release assay (IGRA) is more specific than the tuberculin skin test to discriminate between tuberculosis (TB) and nontuberculous mycobacterial (NTM) diseases. Here we performed a retrospective study to evaluate the performance of the T-SPOT.TB in patients with NTM diseases. METHODS: Between March, 2013 and Nov, 2015, a total of 58 patients with NTM diseases had a T-SPOT.TB performed were enrolled, 30 patients had definite NTM diseases, 28 had probable diseases...
November 25, 2016: BMC Pulmonary Medicine
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