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mycobacterium abscessus

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https://www.readbyqxmd.com/read/29139343/mycobacterium-abscessus-a-taxonomic-puzzle
#1
Enrico Tortoli, Tomas A Kohl, Barbara A Brown-Elliott, Alberto Trovato, Sylvia Cardoso-Leão, Maria Jesus Garcia, Sruthi Vasireddy, Christine Y Turenne, David E Griffith, Julie V Philley, Stefan Niemann, Richard J Wallace, Daniela M Cirillo
No abstract text is available yet for this article.
November 15, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29123166/a-temperature-sensitive-mycobacterium-paragordonae-induces-enhanced-protective-immune-responses-against-mycobacterial-infections-in-the-mouse-model
#2
Byoung-Jun Kim, Bo-Ram Kim, Yoon-Hoh Kook, Bum-Joon Kim
Recently, we introduced a temperature sensitive Mycobacterium spp., Mycobacterium paragordonae (Mpg). Here, we checked its potential as a candidate for live vaccination against Mycobacterium tuberculosis and Mycobacterium abscessus. Intravenous infections of mice with Mpg led to lower colony forming units (CFUs) compared to infection with BCG, suggesting its usefulness as a live vaccine. The analyses of immune responses indicated that the highly protective immunity elicited by Mpg was dependent on effective dendritic maturation, shift of cytokine patterns and antibody production toward a Th1 phenotype, and enhanced cytotoxic T cell response...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29122674/antibiofilm-activity-of-nanoemulsions-of-cymbopogon-flexuosus-against-rapidly-growing-mycobacteria
#3
Grazielle Guidolin Rossi, Kevim Bordignon Guterres, Pauline Cordenonsi Bonez, Samanta da Silva Gundel, Vanessa Albertina Aggertt, Fallon Santos Siqueira, Aline Ferreira Ourique, Roger Wagnerd, Bruna Klein, Roberto Christ Vianna Santos, Marli Matiko Anraku de Campos
Rapidly growing mycobacteria (RGM) are opportunistic microorganisms that can cause both local and disseminated infections. When in biofilm, these pathogens become highly resistant to antimicrobials used in clinical practice. Composed abundantly of polymeric substances, biofilms delay the diffusion of antimicrobials, preventing the drug from penetrating the deeper layers and having an effective action. Therefore, the search for new and alternative therapeutic options has become of fundamental importance. Natural products fall into these options, especially essential oils...
November 6, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29121135/sporotrichoid-pattern-of-mycobacterium-chelonae-abscessus-infection
#4
Jessica L Boulavsky, Holly M Wright, Paul M Rodriguez-Waitkus, Andrew R DiNardo, Laila E Woc-Colburn, Harry Dao
No abstract text is available yet for this article.
September 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29109708/differential-identification-of-mycobacterial-species-using-high-resolution-melting-analysis
#5
Azar D Khosravi, Mohammad Hashemzadeh, Abdolrazagh Hashemi Shahraki, Ali Teimoori
Infections caused by non-tuberculous mycobacteria (NTM) is increasing wordwide. Due to the difference in treatment of NTM infections and tuberculosis, rapid species identification of mycobacterial clinical isolates is necessary for the effective management of mycobacterial diseases treatment and their control strategy. In this study, a cost-effective technique, real-time PCR coupled with high-resolution melting (HRM) analysis, was developed for the differentiation of Mycobacterial species using a novel rpoBC sequence...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29109707/genomic-comparisons-reveal-microevolutionary-differences-in-mycobacterium-abscessus-subspecies
#6
Joon L Tan, Kee P Ng, Chia S Ong, Yun F Ngeow
Mycobacterium abscessus, a rapid-growing non-tuberculous mycobacterium, has been the cause of sporadic and outbreak infections world-wide. The subspecies in M. abscessus complex (M. abscessus, M. massiliense, and M. bolletii) are associated with different biologic and pathogenic characteristics and are known to be among the most frequently isolated opportunistic pathogens from clinical material. To date, the evolutionary forces that could have contributed to these biological and clinical differences are still unclear...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29091186/antimicrobial-resistance-in-mycobacterium-abscessus-complex-isolated-from-patients-with-skin-and-soft-tissue-infections-at-a-tertiary-teaching-hospital-in-taiwan
#7
Ming-Chun Lee, Pei-Lun Sun, Tsu-Lan Wu, Li-Hsin Wang, Chih-Hsun Yang, Wen-Hung Chung, An-Jing Kuo, Tsui-Ping Liu, Jang-Jih Lu, Cheng-Hsun Chiu, Hsin-Chih Lai, Nan-Yu Chen, Jeng-How Yang, Ting-Shu Wu
Background: Mycobacterium abscessus complex (MABC) is the most common non-tuberculous mycobacterium that causes complicated skin and soft tissue infections (cSSTIs). The selection of antimycobacterial agents for successful treatment of such infections is a critical issue. Objectives: To investigate the antimicrobial susceptibility patterns of MABC isolates from skin and soft tissue to a variety of antimycobacterial agents. Methods: Sixty-seven MABC isolates were collected and partial gene sequencing of secA1, rpoB and hsp65 was used to classify them into three subspecies: M...
October 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29091138/lack-of-association-between-rrl-and-erm-41-mutations-and-clarithromycin-resistance-in-mycobacterium-abscessus-complex
#8
Maiara Dos Santos Carneiro, Luciana de Souza Nunes, Simone Maria Martini de David, Afonso Luis Barth
BACKGROUND: Mycobacterium abscessus complex (MABC) includes species with high resistance rates among mycobacterial pathogens. In fact, MABC infections may not respond to clarithromycin treatment, which has historically been very effective against MABC infection. Molecular markers have been proposed to detect both acquired (rrl polymorphisms) and inducible (erm(41) polymorphisms) clarithromycin resistance in MABC isolates. OBJECTIVES: This study aimed to evaluate the susceptibility profile and molecular markers of clarithromycin resistance in MABC...
November 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/29089153/in-vitro-activity-between-linezolid-and-other-antimicrobial-agents-against-mycobacterium-abscessus-complex
#9
Zhijian Zhang, Jie Lu, Yuanyuan Song, Yu Pang
Linezolid (LZD) serves as an effective option in the treatment of Mycobacterium abscessus complex (MABC) infection. Unfortunately, the combined activities of LZD with other antimicrobial agents against MABC have not been evaluated systemically. In this study, we randomly selected 32 Mycobacterium abscessus and 32 Mycobacterium massiliense isolates for the determination of in vitro synergistic effect between LZD and other antimicrobial agents, including amikacin (AMK), moxifloxacin (MOX), cefoxitin (CFX) and tigecycline (TGC)...
September 22, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29079298/rapid-detection-of-mutations-in-erm-41-and-rrl-associated-with-clarithromycin-resistance-in-mycobacterium-abscessus-complex-by-denaturing-gradient-gel-electrophoresis
#10
Weijia Liu, Bing Li, Haiqing Chu, Zhemin Zhang, Liulin Luo, Wei Ma, Shiyi Yang, Qi Guo
Clarithromycin resistance is increasing dramatically among Mycobacterium abscessus complex. The main resistance mechanisms are mutations in the erm(41) and rrl genes. Here we report PCR-based denaturing gradient gel electrophoresis (DGGE) as an alternative method for rapidly detection of mutations in erm(41) and rrl among M. abscessus isolates. Four primer sets targeting the full-length erm(41) gene and a 354bp fragment of the rrl gene were designed. A combination of 16 different DGGE patterns were observed for erm(41) gene, including 16 in M...
October 24, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29061748/in-vitro-evaluation-of-povidone-iodine-and-chlorhexidine-against-outbreak-and-non-outbreak-strains-of-mycobacterium-abscessus-using-standard-quantitative-suspension-and-carrier-testing
#11
Aristine Cheng, Hsin-Yun Sun, Yi-Tzu Tsai, Un-In Wu, Yu-Chung Chuang, Jann-Tay Wang, Wang-Huei Sheng, Po-Ren Hsueh, Yee-Chun Chen, Shan-Chwen Chang
BackgroundPovidone-iodine (PI) and chlorhexidine (CHX) are widely used antiseptics active against conventional Staphylococcus aureus, Enterobacteriaceae, Candida species and viruses but their efficacy against Mycobacterium abscessus remain unproven.MethodsWe determined the in vitro potency of alcoholic PI and CHX against M. abscessus subspecies abscessus (ATCC 19977), M. abscessus subspecies bolletii (BCRC 16915), our outbreak strain of M. abscessus subspecies massiliense (TPE 101) in reference to Staphylococcus aureus (ATCC 29213) by standard quantitative suspension and carrier methods (EN 14563)...
October 23, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29061744/molecular-mechanisms-of-intrinsic-streptomycin-resistance-in-mycobacterium-abscessus
#12
Michael Dal Molin, Myriam Gut, Anna Rominski, Klara Haldimann, Katja Becker, Peter Sander
Streptomycin, the first drug used for the treatment of tuberculosis, shows limited activity against the highly resistant pathogen Mycobacterium abscessus We recently identified two aminoglycoside-acetylating genes [aac(2') and eis2] which however do not affect susceptibility to streptomycin. This suggests the existence of a discrete mechanism of streptomycin resistance. M. abscessus BlastP analysis identified MAB_2385 as a close homologue of the 3' '-O-phosphotransferase [APH(3' ')] from the opportunistic pathogen Mycobacterium fortuitum, as a putative streptomycin resistance determinant...
October 23, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29059250/causative-species-of-nontuberculous-mycobacterial-lung-disease-and-comparative-investigation-on-clinical-features-of-mycobacterium-abscessus-complex-disease-a-retrospective-analysis-for-two-major-hospitals-in-a-subtropical-region-of-japan
#13
COMPARATIVE STUDY
Hiroaki Nagano, Takeshi Kinjo, Yuichiro Nei, Shin Yamashiro, Jiro Fujita, Tomoo Kishaba
Nontuberculous mycobacteria (NTM) lung disease is increasing globally. Although the etiological epidemiology of NTM is different across regions, Mycobacterium avium complex (MAC) is the leading cause of NTM lung disease in most countries, including mainland Japan. Okinawa is located in the southernmost region of Japan and is the only prefecture categorized as a subtropical region in Japan, it is therefore likely the etiological epidemiology of NTM lung disease is different from mainland Japan. From 2009 to 2015, the medical records of patients, with respiratory specimens positive for NTMs, visiting or admitted to two Okinawan hospitals, were retrospectively analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/29044406/clinical-mycobacterium-abscessus-strain-inhibits-autophagy-flux-and-promotes-its-growth-in-murine-macrophages
#14
Seong-Woo Kim, Bindu Subhadra, Jake Whang, Yong Woo Back, Hyun Shik Bae, Hwa-Jung Kim, Chul Hee Choi
Autophagy is known to be a vital homeostatic defense process that controls mycobacterial infection. However, the relationship between autophagy response and the virulence of Mycobacterium abscessus strain UC22 has not been reported. Here, we demonstrate that M. abscessus induces autophagy and inhibits autophagy flux in murine macrophages. Further, the rough variant of M. abscessus, UC22 that is a highly virulent clinical isolate, significantly inhibited autophagic flux than the smooth variant of M. abscessus ATCC 19977...
November 30, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/29030295/the-new-phylogeny-of-the-genus-mycobacterium-the-old-and-the-news
#15
Enrico Tortoli, Tarcisio Fedrizzi, Conor J Meehan, Alberto Trovato, Antonella Grottola, Elisabetta Giacobazzi, Giulia Fregni Serpini, Sara Tagliazucchi, Anna Fabio, Clotilde Bettua, Roberto Bertorelli, Francesca Frascaro, Veronica De Sanctis, Monica Pecorari, Olivier Jousson, Nicola Segata, Daniela M Cirillo
BACKGROUND: Phylogenetic studies of bacteria have been based so far either on a single gene (usually the 16S rRNA) or on concatenated housekeeping genes. For what concerns the genus Mycobacterium these approaches support the separation of rapidly and slowly growing species and the clustering of most species in well-defined phylogenetic groups. The advent of high-throughput shotgun sequencing leads us to revise conventional taxonomy of mycobacteria on the light of genomic data. For this purpose we investigated 88 newly sequenced species in addition to 60 retrieved from GenBank and used the Average Nucleotide Identity pairwise scores to reconstruct phylogenetic relationships within this genus...
October 11, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28988958/mycobacterium-abscessus-and-massiliense-lung-infection-during-macrolide-treatment-for-bronchiolitis-obliterans-after-allogeneic-hematopoietic-stem-cell-transplantation
#16
Noriko Miyake, Yong Chong, Ruriko Nishida, Katsuto Takenaka, Koji Kato, Toshihiro Miyamoto, Akio Aono, Akiko Takaki, Satoshi Mitarai, Shinji Shimoda, Nobuyuki Shimono, Koichi Akashi
In patients undergoing allogeneic hematopoietic stem cell transplantation (allo-SCT), post-transplant lung infection is critical for their prognosis. Mycobacterium abscessus complex is not fully recognized as a nontuberculous mycobacteria (NTM) pathogen of post-SCT lung infection. Here, we present three post-allogeneic SCT patients who developed pulmonary infection caused by M. abscessus complex including M. abscessus and M. massiliense. In all three cases, macrolide antibiotics had been administered for bronchiolitis obliterans syndrome (BOS) before the confirmation of their infection, and macrolide resistance was noted in the M...
October 5, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28983867/mycobacterium-abscessus-complex-infections-in-children-a-review
#17
REVIEW
Arick P Sabin, Patricia Ferrieri, Susan Kline
PURPOSE OF REVIEW: Infections in children with Mycobacterium abscessus complex represent a particular challenge for clinicians. Increasing incidence of these infections worldwide has necessitated focused attention to improve both diagnostic as well as treatment modalities. Published medical literature was reviewed, with emphasis on material published in the past 5 years. RECENT FINDINGS: Increasing availability of new diagnostic tools, such as matrix-assisted laser desorption ionization-time of flight mass spectrometry and custom PCRs, has provided unique insights into the subspecies within the complex and improved diagnostic certainty...
October 5, 2017: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/28971307/non-tuberculous-mycobacterium-bacteraemia-in-a-pregnant-systemic-lupus-erythematosus-sle-patient-a-case-review-and-pooled-case-analysis
#18
REVIEW
Syahrul Sazliyana Shaharir, Narisa Sulaiman Sahari, Zeena Mohamed Fuad, Wan Zul Haikal Wan Zukiman, Nurul Hafizah Mohd Yusof, Anita Sulong, Petrick Periasamy
Non-tuberculous mycobacteria (NTM) are recognized as an important cause of human diseases and infections. It is commonly known to cause infections of the skin, soft tissue infections, and pulmonary infection as well as bacteraemia. We report a challenging case of severe mycobacterium abscessus bacteraemia in a pregnant lady with active systemic lupus erythematous (SLE). A comprehensive literature review of NTM infection among SLE patients was also performed, and pooled analysis of the reported cases, including our case, was done to determine the clinical characteristics and factors associated with poor outcome of NTM infection...
October 3, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28961987/effect-of-%C3%AE-lactamase-production-and-%C3%AE-lactam-instability-on-mic-testing-results-for-mycobacterium-abscessus
#19
Anna Rominski, Bettina Schulthess, Daniel M Müller, Peter M Keller, Peter Sander
Objectives: Limited treatment options available for Mycobacterium abscessus infections include the parenteral β-lactam antibiotics cefoxitin and imipenem, which show moderate in vitro activity. Other β-lactam antibiotics (except meropenem) have no considerable in vitro activity, due to their rapid hydrolysis by a broad-spectrum β-lactamase (Bla_Mab). We here addressed the impact of β-lactamase production and β-lactam in vitro stability on M. abscessus MIC results and determined the epidemiological cut-off (ECOFF) values of cefoxitin, imipenem and meropenem...
November 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28959242/relationship-between-antibiotic-susceptibility-and-genotype-in-mycobacterium-abscessus-clinical-isolates
#20
Bing Li, Shiyi Yang, Haiqing Chu, Zhemin Zhang, Weijia Liu, Liulin Luo, Wei Ma, Xiaogang Xu
This study aimed to determine the antibiotic susceptibility and resistance related genotypes of Mycobacterium abscessus. One hundred sixty-two clinical isolates were collected. Genomic data were obtained by whole genome sequencing. Single nucleotide polymorphism (SNP) analysis was conducted using the NCBI GenBank database and BLAST algorithm. The following genes were of interest: erm(41), rrl and rrs. Erm(41) was further divided into 3 sequevars: erm(41)C28, erm(41)T28, and M type [erm(41) with deletions in nucleotides 64 and 65, or 159 through 432]...
2017: Frontiers in Microbiology
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