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https://www.readbyqxmd.com/read/28928258/implantable-cardiac-defibrillator-infections-the-emerging-importance-of-mycobacterium-fortuitum
#1
Menfil Orellana-Barrios, David A Sotello Aviles, Olusegun Oyenuga, Kenneth Nugent
Infection is a clinically relevant complication associated with intracardiac devices. Atypical mycobacteria, particularly Mycobacterium fortuitum, have been increasingly implicated in cardiovascular implantable electronic device (CIED) infections. We present a case of M. fortuitum CIED infection in a patient with ischaemic cardiomyopathy occurring approximately 3 weeks after insertion. The recognition and adequate treatment, including device removal, tissue sampling and the determination of antimicrobial sensitivities, are essential in the proper management of these patients...
September 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28855835/distribution-of-non-tuberculosis-mycobacteria-strains-from-suspected-tuberculosis-patients-by-heat-shock-protein-65-pcr-rflp
#2
Ali Nour-Neamatollahie, Nayereh Ebrahimzadeh, Seyed Davar Siadat, Farzam Vaziri, Mona Eslami, Abbas Akhavan Sepahi, Sharareh Khanipour, Morteza Masoumi, Fatemeh Sakhaee, Morteza Ghazanfari Jajin, Ahmadreza Bahrmand, Abolfazl Fateh
The genus Mycobacterium contains more than 150 species. Non-tuberculosis mycobacteria (NTM) often cause extrapulmonary and pulmonary disease. Mycobacteria detection at species level is necessary and provides useful information on epidemiology and facilitates successful treatment of patients. This retrospective study aimed to determine the incidence of the NTM isolates and Mycobacterium tuberculosis (Mtb) in clinical specimens collected from Iranian patients during February 2011-December 2013, by PCR-restriction fragment length polymorphism analysis (PRA) of the hsp65 gene...
September 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28836034/spatio-temporal-study-of-environmental-nontuberculous-mycobacteria-isolated-from-wardha-district-in-central-india
#3
Pranava S Mishra, Pratibha Narang, Rahul Narang, Bidhan Goswami, Deepak K Mendiratta
During the last two decades, nontuberculous mycobacteria (NTM) have gained in importance but there is still a paucity of data, particularly for environmental isolates. We studied, over a period of two years, the spatio-temporal features of NTM isolates obtained from different environmental sources in Wardha district, India. A total of 1398 samples (699 each of soil and water) were tested and 170 (12.2%) yielded NTM isolates, including 123 from soil and 47 from water samples. Out of 170 NTM isolates, 107 (63%) belonged to potentially pathogenic mycobacteria (PPM) and 63 (37%) to the less pathogenic mycobacterial (LPM) group...
August 23, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28829035/mycobacterium-aquaticum-sp-nov-a-rapidly-growing-species-isolated-from-haemodialysis-water
#4
Abdolrazagh Hashemi Shahraki, Alberto Trovato, Sara Droz, Parvin Haidarieh, Emanuele Borroni, Mehdi Mirsaeidi, Roberta Mannino, Mohamad Hashemzadeh, Alessandro Mariottini, Daniela Maria Cirillo, Enrico Tortoli
The characterization of five Iranian isolates, four from hospital haemodialysis water and one from the sputum of a patient, led to the detection of a novel mycobacterium species. The strains were characterized by mucoid colonies developing in 3-5 days at temperatures ranging from 25 to 37 °C. The biochemical test pattern was unremarkable while the HPLC profile of mycolic acids resembled that of Mycobacterium fortuitum. The sequences of three major housekeeping genes (16S rRNA, hsp65 and rpoB) were unique and differed from those of any other mycobacterium...
September 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28817307/geographic-distribution-of-nontuberculous-mycobacterial-species-identified-among-clinical-isolates-in-the-united-states-2009-2013
#5
Alicen B Spaulding, Yi Ling Lai, Adrian M Zelazny, Kenneth N Olivier, Sameer S Kadri, D Rebecca Prevots, Jennifer Adjemian
RATIONALE: Nontuberculous mycobacteria are an important cause of morbidity in the United States, although patient outcomes vary greatly by species. Currently, nationally representative data on the distribution of mycobacterial species from clinical isolates are limited. OBJECTIVES: Using a national hospitalization database capturing microbiologic data for nearly six million patient encounters, we describe the geographic distribution of, and patient demographic features associated with, clinical mycobacterial isolates in the United States...
August 17, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28810868/nontuberculosis-mycobacteria-are-the-major-causes-of-tuberculosis-like-lesions-in-cattle-slaughtered-at-bahir-dar-abattoir-northwestern-ethiopia
#6
Anwar Nuru, Aboma Zewude, Temesgen Mohammed, Biniam Wondale, Laikemariam Teshome, Muluwork Getahun, Gezahegne Mamo, Girmay Medhin, Rembert Pieper, Gobena Ameni
BACKGROUND: The main cause of bovine tuberculosis (bTB) is believed to be Mycobacterium bovis (M. bovis). Nontuberculosis mycobacteria (NTM) are neglected but opportunistic pathogens and obstacles for bTB diagnosis. This study aimed to isolate and characterize the mycobacteria organisms involved in causing TB-like lesions in cattle in northwestern Ethiopia. RESULTS: A total of 2846 carcasses of cattle were inspected for TB lesions. Ninety six tissues (including lymph nodes such as submandibular, retropharyngeal, tonsilar, mediatinal, bronchial and mesenteric, and organs such as lung, liver and kidney) with suspicious TB lesion(s) were collected and cultured on Lowenstein-Jensen medium...
August 15, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28776533/efficacy-of-calcium-hypochlorite-and-ultraviolet-irradiation-against-mycobacterium-fortuitum-and-mycobacterium-marinum
#7
E A Roshani Edirisinghe, D R Anuruddhika Dissanayake, Charmalie L Abayasekera, Appudurai Arulkanthan
BACKGROUND: Nontuberculous mycobacteria (NTM) cause opportunistic infections with increasing frequency in immunocompromised humans. Water is one of the natural sources for transmission of NTM and plays a major role in the epidemiology of NTM infections. This study evaluated the efficacy of calcium hypochlorite and ultraviolet irradiation (UV) to eliminate potentially zoonotic NTM species such as M. marinum and M. fortuitum. MATERIALS AND METHODS: Bacterial suspensions containing1-4 × 105 CFU/ml were exposed to 5, 50, 100, 1,000 and 10,000 mg/L of Ca (OCl)2for 1, 5, 10, 15, 20, 30 and 60 minutes, and 6,000 μW/cm2 UV dose for 5, 10, 20, 30, 60 and 120 seconds...
July 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28776521/epidemiological-and-laboratorial-profile-of-patients-with-isolation-of-nontuberculous-mycobacteria
#8
Heloisa Silveira Paro Pedro, Andréa Gobetti Vieira Coelho, Isabela Mazuco Mansur, Ana Carolina Chiou, Maria Izabel Ferreira Pereira, Naiara Cristina Ule Belotti, Manuela Galloy Sanches Ismael, Maria Rita de Cássia Oliveira Cury, Susilene Maria Tonelli Nardi, Érica Chimara
BACKGROUND: An increase in NTM diseases in the international scenario has been observed in recent years. AIMS: To analyze the epidemiological and laboratory profiles of patients with isolation of nontuberculous mycobacteria (NTM) over one decade. A retrospective analysis of records of a mycobacterial reference laboratory found 135 cases with isolation of NTM. METHODS: Clinical and epidemiological data were collected from the records of government health clinics and from the State notification system (TBWEB)...
July 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28769045/arsenic-exposure-impels-cd4-commitment-in-thymus-and-suppress-t-cell-cytokine-secretion-by-increasing-regulatory-t-cells
#9
Ruchi Gera, Vikas Singh, Sumonto Mitra, Anuj Kumar Sharma, Alok Singh, Arunava Dasgupta, Dhirendra Singh, Mahadeo Kumar, Pankaj Jagdale, Satyakam Patnaik, Debabrata Ghosh
Arsenic is globally infamous for inducing immunosuppression associated with prevalence of opportunistic infection in exposed population, although the mechanism remains elusive. In this study, we investigate the effect of arsenic exposure on thymocyte lineage commitment and the involvement of regulatory T cells (Treg) in arsenic-induced immunosuppression. Male Balb/c mice were exposed to 0.038, 0.38 and 3.8 ppm sodium arsenite for 7, 15 and 30 days through oral gavage. Arsenic exposure promoted CD4 lineage commitment in a dose dependent manner supported by the expression of ThPOK in thymus...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724491/comparison-of-antemortem-and-environmental-samples-for-zebrafish-health-monitoring-and-quarantine
#10
Marcus J Crim, Christian Lawrence, Robert S Livingston, Andrei Rakitin, Shane J Hurley, Lela K Riley
Molecular diagnostic assays offer both exquisite sensitivity and the ability to test a wide variety of sample types. Various types of environmental sample, such as detritus and concentrated water, might provide a useful adjunct to sentinels in routine zebrafish health monitoring. Similarly, antemortem sampling would be advantageous for expediting zebrafish quarantine, without euthanasia of valuable fish. We evaluated the detection of Mycobacterium chelonae, M. fortuitum, M. peregrinum, Pseudocapillaria tomentosa, and Pseudoloma neurophilia in zebrafish, detritus, pooled feces, and filter membranes after filtration of 1000-, 500-, and 150-mL water samples by real-time PCR analysis...
July 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28719321/association-of-interferon-%C3%AE-receptor-1-gene-polymorphism-with-nontuberculous-mycobacterial-lung-infection-among-iranian-patients-with-pulmonary-disease
#11
COMPARATIVE STUDY
Poopak Farnia, Jalaledin Ghanavi, Shima Saif, Parissa Farnia, Ali Akbar Velayati
Nontuberculous mycobacteria (NTM) cause significant pulmonary infections in humans. Researchers have reported an association between interferon-gamma receptor-1 (IFN-γR1 or IFNGR1) deficiency and susceptibility to NTM, but the relevance of polymorphism within these genes is not yet clear. In this study, a single nucleotide polymorphism (SNP), T to C, at position-56 in NTM patients with pulmonary disease was investigated. Molecular identification of Mycobacterium isolates was performed with hsp65 genes using polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP)...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28713782/characterization-and-differentiation-of-mycobacterium-avium-subsp-paratuberculosis-from-other-mycobacteria-using-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry
#12
Subbarao V Ravva, Leslie A Harden, Chester Z Sarreal
Mycobacterium avium subsp. paratuberculosis (MAP), the causative agent of Johne's disease in cattle, is responsible for significant economic losses to the US dairy industry. The pathogen has also been associated with chronic human diseases like Crohn's disease, type 1 diabetes and multiple sclerosis. Determining causation requires rapid characterization and source tracking the pathogen. Here, we used matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry to characterize and differentiate strains of MAP from 14 other species of Mycobacterium from bovine, human, and environmental sources...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28710625/selection-of-biodegrading-phytosterol-strains
#13
María-Angélica Mondaca, Maricel Vidal, Soledad Chamorro, Gladys Vidal
The phytosterol-biotransforming strains were selected from Mycobacterium sp., using a high concentration of β-sitosterol. The selection was made by culturing the strains in a medium enriched with 14 g β-sitosterol/L as the unique source of carbon. During 2 months, the bacterial cultures were transferred successively. The extraction of the biotransformation products was made with methanol and ethyl acetate. The qualitative and quantitative analysis was made by means of thin-layer chromatography, gas-liquid chromatography (GLC), and GLC-mass spectrometry...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28708374/chemical-modification-and-detoxification-of-the-pseudomonas-aeruginosa-toxin-2-heptyl-4-hydroxyquinoline-n-oxide-by-environmental-and-pathogenic-bacteria
#14
Sven Thierbach, Franziska S Birmes, Matthias C Letzel, Ulrich Hennecke, Susanne Fetzner
2-Heptyl-4-hydroxyquinoline N-oxide (HQNO), a major secondary metabolite and virulence factor produced by the opportunistic pathogen Pseudomonas aeruginosa, acts as a potent inhibitor of respiratory electron transfer and thereby affects host cells as well as microorganisms. In this study, we demonstrate the previously unknown capability of environmental and pathogenic bacteria to transform and detoxify this compound. Strains of Arthrobacter and Rhodococcus spp. as well as Staphylococcus aureus introduced a hydroxyl group at C-3 of HQNO, whereas Mycobacterium abscessus, M...
September 15, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28699669/detection-of-mycobacterium-marinum-m-%C3%A2-peregrinum-m-%C3%A2-fortuitum-and-m-%C3%A2-abscessus-in-aquarium-fish
#15
K Puk, T Banach, A Wawrzyniak, Ł Adaszek, J Ziętek, S Winiarczyk, L Guz
No abstract text is available yet for this article.
July 12, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28688832/prosthetic-valve-infective-endocarditis-with-mycobacterium-fortuitum-antibiotics-alone-can-be-curative
#16
Sonali R Gnanenthiran, Eunice Y T Liu, Michael Wilson, Tommy Chung, Thomas Gottlieb
Rapidly growing non-tuberculous mycobacteria (RGM) are a rare, often fatal cause of infective endocarditis. Although surgery has been the cornerstone of RGM endocarditis therapy, we present the first documented adult case of Mycobacterium fortuitum endocarditis cured with antibiotic therapy.
June 15, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28662943/discovery-of-novel-antimycobacterial-drug-therapy-in-biofilm-of-pathogenic-nontuberculous-mycobacterial-keratitis
#17
Thet Tun Aung, Wei Hong Jeff Chor, Joey Kuok Hoong Yam, Michael Givskov, Liang Yang, Roger W Beuerman
PURPOSE: The potential of slow-growing mycobacteria to form biofilms in human tissues contributes to the problem of establishing an effective treatment strategy. The purpose of this study was to examine new antibiotic strategies to enhance current treatment options for these infections. METHODS: Sensitivities of Mycobacterium fortuitum ATCC 49404 and Mycobacterium chelonae ATCC 35752 were evaluated for different antimicrobials singly and in combination using broth microdilution and FICI (Fractional Inhibitory Concentration Index) synergy screening...
June 26, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28649235/detection-of-mycobacteria-by-culture-and-dna-based-methods-in-animal-derived-food-products-purchased-at-spanish-supermarkets
#18
Iker A Sevilla, Elena Molina, Maitane Tello, Natalia Elguezabal, Ramón A Juste, Joseba M Garrido
Mycobacteria include obligate and opportunistic pathogens that cause significant human and animal disease. The burden of tuberculosis has been largely reduced in developed territories but remains a huge problem worldwide. The significance of nontuberculous mycobacteria is growing considerably, especially in developed regions with higher life expectancy and more therapy-related immunosuppressed individuals. Due to their robustness mycobacteria can contaminate animal products by direct transmission from infected individuals or by environmental contamination during processing...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28629354/acetone-leaf-extracts-of-some-south-african-trees-with-high-activity-against-escherichia-coli-also-have-good-antimycobacterial-activity-and-selectivity-index
#19
Ishaku L Elisha, Francien S Botha, Balungile Madikizela, Lyndy J McGaw, Jacobus N Eloff
BACKGROUND: Tuberculosis is a world-wide problem affecting humans and animals. There is increasing development of resistance of the pathogens to current antimycobacterial agents. Many authors have investigated activities of extracts and isolated compounds from plants. The traditional uses of plants have frequently been the criterion to select plants investigated. In this contribution, we investigate whether plant extracts with very good activity against Escherichia coli may also be active against mycobacteria...
June 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28619015/nontuberculosis-mycobacterial-infections-at-a-specialized-tuberculosis-treatment-centre-in-the-republic-of-korea
#20
Hee Jung Yoon, Hwa Young Choi, Moran Ki
BACKGROUND: The incidence of nontuberculous mycobacteria (NTM) infections is increasing worldwide, however formal evaluations of the epidemiology of NTM infections are limited. Understanding the trends and true prevalence of NTM is a major priority for optimizing infection control programmes and resources. The purpose of this study was to investigate the epidemiology, clinical manifestations, and radiologic findings in NTM-infected patients at specialized Tuberculosis (Tb) treatment centre in South Korea, which is endemic to Tb, and find solutions to control NTM infections...
June 15, 2017: BMC Infectious Diseases
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