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mycobacterium abscessus

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https://www.readbyqxmd.com/read/27918379/nontuberculous-mycobacteria-in-children-a-focus-on-bloodstream-infections
#1
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/27906132/the-distinct-fate-of-smooth-and-rough-mycobacterium-abscessus-variants-inside-macrophages
#2
Anne-Laure Roux, Albertus Viljoen, Aïcha Bah, Roxane Simeone, Audrey Bernut, Laura Laencina, Therese Deramaudt, Martin Rottman, Jean-Louis Gaillard, Laleh Majlessi, Roland Brosch, Fabienne Girard-Misguich, Isabelle Vergne, Chantal de Chastellier, Laurent Kremer, Jean-Louis Herrmann
Mycobacterium abscessus is a pathogenic, rapidly growing mycobacterium responsible for pulmonary and cutaneous infections in immunocompetent patients and in patients with Mendelian disorders, such as cystic fibrosis (CF). Mycobacterium abscessus is known to transition from a smooth (S) morphotype with cell surface-associated glycopeptidolipids (GPL) to a rough (R) morphotype lacking GPL. Herein, we show that M. abscessus S and R variants are able to grow inside macrophages and are present in morphologically distinct phagosomes...
November 2016: Open Biology
https://www.readbyqxmd.com/read/27896296/eradication-of-mycobacterium-abscessus-pulmonary-infection-in-a-child-with-idiopathic-bronchiectasis
#3
Sarah K Anisowicz, Sebastian K Welsh, Jane E Gross
No abstract text is available yet for this article.
2016: Global Pediatric Health
https://www.readbyqxmd.com/read/27884340/use-of-an-experimental-model-to-evaluate-infection-resistance-of-meshes-in-abdominal-wall-surgery
#4
Ramón Pérez-Tanoira, C Lévano-Linares, Á Celdrán-Uriarte, M C Isea-Peña, M Sánchez De Molina, C García-Vasquez, J Esteban-Moreno
BACKGROUND: Staphylococcal species are the most common organisms causing prosthetic mesh infections, however, infections due to rapidly growing mycobacteria are increasing. This study evaluates the resistance of biomaterial for abdominal wall prostheses against the development of postoperative infection in a rat model. MATERIAL AND METHODS: In 75 rats, we intramuscularly implanted three different types of prostheses: (1) low-density polypropylene monofilament mesh (PMM), (2) high-density PMM, and (3) a composite prosthesis composed of low-density PMM and a nonporous hydrophilic film...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27876856/the-trend-and-the-disease-prediction-of-vascular-endothelial-growth-factor-and-placenta-growth-factor-in-nontuberculous-mycobacterial-lung-disease
#5
Chou-Han Lin, Chin-Chung Shu, Chia-Lin Hsu, Shih-Lung Cheng, Jann-Yuan Wang, Chong-Jen Yu, Li-Na Lee
Nontuberculous mycobacteria (NTM)-lung disease (LD) is an increasing health problem worldwide. The diagnosis of this disease remains difficult, however the application of placenta growth factor (PlGF) and vascular endothelial growth factor (VEGF) has not yet been studied. We screened patients with Mycobacterium avium complex or M. abscessus isolated from sputum, and enrolled 32 patients with NTM-LD and 93 with NTM pulmonary colonization. The NTM-LD group had a lower body mass index, higher proportion of bronchiectasis, more respiratory symptoms and pulmonary lesions, and higher titers of sputum acid-fast stain than the NTM pulmonary colonization group...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847012/prevalence-and-species-spectrum-of-both-pulmonary-and-extrapulmonary-nontuberculous-mycobacteria-isolates-at-a-tertiary-care-center
#6
Jyoti Umrao, Dharamveer Singh, Amreen Zia, Swati Saxena, Surendra Sarsaiya, Shushma Singh, Jahanarah Khatoon, Tapan N Dhole
OBJECTIVE/BACKGROUND: Nontuberculous mycobacteria (NTM) infection associated with pulmonary and extrapulmonary disease has been increasing globally. Despite an increase in incidence rate of NTM infection, its prevalence, species diversity, and circulation pattern in India is largely unknown. This study sought to investigate the overall burden and diversity of NTM among both pulmonary and extrapulmonary clinical isolates from a Northern Indian population. METHODS: The study was conducted in the Department of Microbiology, from January 2013 to December 2015...
September 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27846606/emergence-and-spread-of-a-human-transmissible-multidrug-resistant-nontuberculous-mycobacterium
#7
Josephine M Bryant, Dorothy M Grogono, Daniela Rodriguez-Rincon, Isobel Everall, Karen P Brown, Pablo Moreno, Deepshikha Verma, Emily Hill, Judith Drijkoningen, Peter Gilligan, Charles R Esther, Peadar G Noone, Olivia Giddings, Scott C Bell, Rachel Thomson, Claire E Wainwright, Chris Coulter, Sushil Pandey, Michelle E Wood, Rebecca E Stockwell, Kay A Ramsay, Laura J Sherrard, Timothy J Kidd, Nassib Jabbour, Graham R Johnson, Luke D Knibbs, Lidia Morawska, Peter D Sly, Andrew Jones, Diana Bilton, Ian Laurenson, Michael Ruddy, Stephen Bourke, Ian C J W Bowler, Stephen J Chapman, Andrew Clayton, Mairi Cullen, Owen Dempsey, Miles Denton, Maya Desai, Richard J Drew, Frank Edenborough, Jason Evans, Jonathan Folb, Thomas Daniels, Helen Humphrey, Barbara Isalska, Søren Jensen-Fangel, Bodil Jönsson, Andrew M Jones, Terese L Katzenstein, Troels Lillebaek, Gordon MacGregor, Sarah Mayell, Michael Millar, Deborah Modha, Edward F Nash, Christopher O'Brien, Deirdre O'Brien, Chandra Ohri, Caroline S Pao, Daniel Peckham, Felicity Perrin, Audrey Perry, Tania Pressler, Laura Prtak, Tavs Qvist, Ali Robb, Helen Rodgers, Kirsten Schaffer, Nadia Shafi, Jakko van Ingen, Martin Walshaw, Danie Watson, Noreen West, Joanna Whitehouse, Charles S Haworth, Simon R Harris, Diane Ordway, Julian Parkhill, R Andres Floto
Lung infections with Mycobacterium abscessus, a species of multidrug-resistant nontuberculous mycobacteria, are emerging as an important global threat to individuals with cystic fibrosis (CF), in whom M. abscessus accelerates inflammatory lung damage, leading to increased morbidity and mortality. Previously, M. abscessus was thought to be independently acquired by susceptible individuals from the environment. However, using whole-genome analysis of a global collection of clinical isolates, we show that the majority of M...
November 11, 2016: Science
https://www.readbyqxmd.com/read/27826888/non-tuberculous-mycobacteria-classification-diagnostics-and-therapy
#8
I Porvaznik, I Solovič, J Mokrý
Non-tuberculous mycobacteria (NTM) are species other than those belonging to the Mycobacterium tuberculosis complex and do not cause leprosy. NTM are generally free-living organisms that are ubiquitous in the environment. There have been more than 140 NTM species identified to-date. They can cause a wide range of infections, with pulmonary infections being the most frequent (65-90 %). There is growing evidence that the incidence of NTM lung diseases and associated hospitalizations are on the rise, mainly in regions with a low prevalence of tuberculosis...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27806130/mycobacterium-abscessus-induced-granuloma-formation-is-strictly-dependent-on-tnf-signaling-and-neutrophil-trafficking
#9
Audrey Bernut, Mai Nguyen-Chi, Iman Halloum, Jean-Louis Herrmann, Georges Lutfalla, Laurent Kremer
Mycobacterium abscessus is considered the most common respiratory pathogen among the rapidly growing non-tuberculous mycobacteria. Infections with M. abscessus are increasingly found in patients with chronic lung diseases, especially cystic fibrosis, and are often refractory to antibiotic therapy. M. abscessus has two morphotypes with distinct effects on host cells and biological responses. The smooth (S) variant is recognized as the initial airway colonizer while the rough (R) is known to be a potent inflammatory inducer associated with invasive disease, but the underlying immunopathological mechanisms of the infection remain unsolved...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27800519/clofazimine-enteropathy-a-rare-and-underrecognized-complication-of-mycobacterial-therapy
#10
Winnie Szeto, Monica T Garcia-Buitrago, Lilian Abbo, Joseph D Rosenblatt, Baharak Moshiree, Michele I Morris
Clofazimine-induced crystal-storing histiocytosis is a rare complication of treatment previously reported in dermatology literature as a complication of leprosy therapy. We report a case of disseminated Mycobacterium abscessus requiring treatment with high-dose oral clofazimine resulting in enteropathy in a patient who presented with abdominal pain, malnutrition, and melena.
September 2016: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/27799212/selection-of-resistance-to-clarithromycin-with-regard-to-the-subspecies-in-mycobacterium-abscessus
#11
Faiza Mougari, Feriel Bouziane, Flora Crockett, Nessar R Rachid, Françoise Chau, Nicolas Veziris, Guillaume Sapriel, Laurent Raskine, Emmanuelle Cambau
Mycobacterium abscessus is an emerging pathogen against which clarithromycin is the main drug used. Clinical failures are commonly observed and were first attributed to acquired mutations in rrl encoding 23S rRNA but then to the intrinsic production of the Erm (41) 23S RNA methylase. Since M. abscessus was recently distributed into subspecies and erm(41) sequevars, we investigated acquired clarithromycin resistance mechanisms in mutants selected in vitro from four representative strains. Mutants were sequenced for rrl, erm (41), whiB, rpIV, rplD and studied for seven antibiotic MICs...
October 31, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27788025/a-laboratory-based-analysis-of-nontuberculous-mycobacterial-lung-disease-in-japan-from-2012-to-2013
#12
Kozo Morimoto, Naoki Hasegawa, Kiyohiko Izumi, Ho Namkoong, Kazuhiro Uchimura, Takashi Yoshiyama, Yoshihiko Hoshino, Atsuyuki Kurashima, Jun Sokunaga, Shunsuke Shibuya, Masahiro Shimojima, Manabu Ato, Satoshi Mitarai
RATIONALE: Since 2010, studies that utilize mycobacterial examination results have been widely used to survey nontuberculous mycobacterial (NTM) lung disease. OBJECTIVES: Our study aims to reveal the clinical and epidemiological status of NTM lung disease in Japan. METHODS: All data on the isolation and identification of mycobacteria in 2012 and 2013 were obtained from three dominant commercial laboratories in Japan. Pulmonary disease were defined based on the bacteriological diagnostic criteria issued by the American Thoracic Society and the Infectious Diseases Society of America (ATS/IDSA)...
October 27, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27782812/real-time-pcr-for-the-rapid-identification-and-drug-susceptibility-of-mycobacteria-present-in-bronchial-washings
#13
Thilini Piushani Keerthirathne, Dhammika Nayoma Magana-Arachchi, Dushantha Madegedara, Suneth Sithumini Sooriyapathirana
BACKGROUND: Mycobacteria have a spectrum of virulence and different susceptibilities to antibiotics. Distinguishing mycobacterial species is vital as patients with non-tuberculous mycobacterial (NTM) infections present clinical features that are similar to those of patients with tuberculosis. Thus, rapid differentiation of Mycobacterium tuberculosis complex from NTM is critical to administer appropriate treatment. Hence the aim of the study was to rapid identification of mycobacterial species present in bronchial washings using multiplex real time Polymerase Chain Reaction (PCR) and to determine the drug susceptibility in identified mycobacterial species...
October 26, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27757105/mycobacteria-clumping-increase-their-capacity-to-damage-macrophages
#14
Cecilia Brambilla, Marta Llorens-Fons, Esther Julián, Estela Noguera-Ortega, Cristina Tomàs-Martínez, Miriam Pérez-Trujillo, Thomas F Byrd, Fernando Alcaide, Marina Luquin
The rough morphotypes of non-tuberculous mycobacteria have been associated with the most severe illnesses in humans. This idea is consistent with the fact that Mycobacterium tuberculosis presents a stable rough morphotype. Unlike smooth morphotypes, the bacilli of rough morphotypes grow close together, leaving no spaces among them and forming large aggregates (clumps). Currently, the initial interaction of macrophages with clumps remains unclear. Thus, we infected J774 macrophages with bacterial suspensions of rough morphotypes of M...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27748623/randomized-trial-of-liposomal-amikacin-for-inhalation-in-nontuberculous-mycobacterial-lung-disease
#15
Kenneth N Olivier, David E Griffith, Gina Eagle, John P McGinnis Ii, Liza Micioni, Keith Liu, Charles L Daley, Kevin L Winthrop, Stephen Ruoss, Doreen J Addrizzo-Harris, Patrick A Flume, Daniel Dorgan, Matthias Salathe, Barbara A Brown-Elliott, Renu Gupta, Richard J Wallace
Rationale Lengthy multi-drug, toxic, and low efficacy regimens limit management of pulmonary nontuberculous mycobacterial (PNTM) disease. Objective This phase 2 study investigated efficacy and safety of liposomal amikacin for inhalation (LAI) in treatment-refractory PNTM (Mycobacterium avium complex [MAC] or Mycobacterium abscessus) disease. Methods During the double-blind phase, patients were randomly assigned to LAI (590 mg) or placebo once daily added to their multi-drug regimen for 84 days. Both groups could receive open-label LAI for 84 additional days...
October 17, 2016: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27730203/the-best-of-respiratory-infections-from-the-2015-european-respiratory-society-international-congress
#16
Eva Polverino, Graham H Bothamley, Delia Goletti, Jan Heyckendorf, Giovanni Sotgiu, Stefano Aliberti
The breadth and quality of scientific presentations on clinical and translational research into respiratory infections at the 2015 European Respiratory Society (ERS) International Congress in Amsterdam, the Netherlands, establishes this area as one of the leadings fields in pulmonology. The host-pathogen relationship in chronic obstructive pulmonary disease, and the impact of comorbidities and chronic treatment on clinical outcomes in patients with pneumonia were studied. Various communications were dedicated to bronchiectasis and, in particular, to different prognostic and clinical aspects of this disease, including chronic infection with Pseudomonas and inhaled antibiotic therapy...
July 2016: ERJ Open Research
https://www.readbyqxmd.com/read/27690688/infections-caused-by-mycobacterium-abscessus-epidemiology-diagnostic-tools-and-treatment
#17
Faiza Mougari, Lorenzo Guglielmetti, Laurent Raskine, Isabelle Sermet-Gaudelus, Nicolas Veziris, Emmanuelle Cambau
Mycobacterium abscessus is an emerging mycobacteria that is responsible for lung diseases and healthcare-associated extrapulmonary infections. Recent findings support its taxonomic status as a single species comprising 3 subspecies designated abscessus, bolletii and massiliense. We performed a review of English-language publications investigating all three of these subspecies. Areas covered: Worldwide, human infections are often attributable to environmental contamination, although the isolation of M. abscessus in this reservoir is very rare...
October 3, 2016: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/27682129/evaluation-of-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-for-identification-of-mycobacterium-abscessus-subspecies-according-to-whole-genome-sequencing
#18
Liulin Luo, Weijia Liu, Bing Li, Mengling Li, Dongdong Huang, Linjie Jing, Huiping Chen, Jinghui Yang, Jun Yue, Fang Wang, Haiqing Chu, Zhemin Zhang
This study was undertaken to evaluate the utility of matrix-assisted laser desorption ionization-time of flight mass spectrometry with the Vitek MS Plus system for identifying Mycobacterium abscessus subspecies in order to facilitate more rapid and appropriate therapy. A total of 175 clinical M. abscessus strains were identified by whole-genome sequencing analysis: 139 Mycobacterium abscessus subsp. abscessus and 36 Mycobacterium abscessus subsp. massiliense The research-use-only (RUO) Saramis Knowledge Base database v...
December 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27672191/fluorescent-reporter-ds6a-mycobacteriophages-reveal-unique-variations-in-infectibility-and-phage-production-in-mycobacteria
#19
Oren Mayer, Paras Jain, Torin R Weisbrod, Daniel Biro, Libby Ho, Deborah Jacobs-Sera, Graham F Hatfull, William R Jacobs
: Mycobacteriophage DS6A is unique among the more than 8,000 isolated mycobacteriophages due to its ability to form plaques exclusively on mycobacteria belonging to the Mycobacterium tuberculosis complex (MTBC). Speculation surrounding this specificity has led to unsupported assertions in published studies and patents that nontuberculous mycobacteria (NTM) are wholly resistant to DS6A infection. In this study, we identified two independent nonessential regions in the DS6A genome and replaced them with an mVenus-expressing plasmid to generate fluorescent reporter phages Φ(2)GFP12 and Φ(2)GFP13...
December 1, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27663154/cutaneous-mycobacterium-abscessus-infection-following-hair-transplant
#20
K Eustace, V Jolliffe, A Sahota, K Gholam
A 28-year-old man presented with a 10-day history of scalp nodules. He had undergone hair transplantation 2 months previously. Incision and drainage of one of the nodules yielded gelatinous material, which was sent for microscopy and culture, including low-temperature culture. After 2 weeks of incubation, culture of the nodule yielded acid- and alcohol-fast bacilli, which were identified as Mycobacterium abscessus, a rapidly growing, nontuberculous mycobacterium, which has been reported to cause cutaneous, soft tissue and respiratory infections following trauma, surgery or injection with nonsterile needles...
October 2016: Clinical and Experimental Dermatology
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