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https://www.readbyqxmd.com/read/29030295/the-new-phylogeny-of-the-genus-mycobacterium-the-old-and-the-news
#1
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 89 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 10, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28990320/non-tuberculosis-mycobacterium-speciation-using-hplc-under-revised-national-tb-control-programme-rntcp-in-india
#2
George Sebastian, Sharath Burugina Nagaraja, Telagi Vishwanatha, Mamatha Voderhobli, Narayana Vijayalakshmi, Prahlad Kumar
AIMS: Non-Tuberculous Mycobacteria (NTM) are ubiquitous in nature. The data on prevalence of NTM under the RNTCP is scarce. Many NTM species have clinical significance, and hence their identification and speciation are important. METHODS AND RESULT: It is a cross-sectional study conducted at the five RNTCP accredited culture and drug susceptibility testing (CDST) laboratory. The culture isolates from AFB positive but Immunochromatographic test negative samples were taken for identification and speciation using HPLC...
October 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28940325/evaluation-of-the-rt-lamp-and-lamp-methods-for-detection-of-mycobacterium-tuberculosis
#3
Dandan Wu, Jiwen Kang, Baosheng Li, Dianxing Sun
BACKGROUND: The current methods for detecting Mycobacterium tuberculosis (Mtb) are not clinically optimal. Standard culture methods (SCMs) are slow, costly, or unreliable, and loop-mediated isothermal amplification (LAMP) cannot differentiate live Mtb. METHODS: This study compared reverse transcription (RT)-LAMP, LAMP, and an SCM for detecting Mtb. A first experiment tested the sensitivity and specificity of primers for 9 species of Mycobacterium (H37Rv, M. intracellulare, M...
September 22, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28932687/multifocal-ulceronecrotic-skin-lesions-a-stigmatizing-case
#4
Fanny-Emmanuelle Bernier, Simon Grandjean Lapierre, Arwa El-Housseini, Mélissa Nantel-Battista, Sapha Barkati
Mycobacterium chelonae is a rapidly growing nontuberculous mycobacteria, ubiquitous in the environment and mostly involved in skin, soft tissue and bone infections. An atypical, severe and multifocal dermatological manifestation of Mycobacterium chelonae infection in an immunocompetent patient is described here. The lesions completely resolved using a multidisciplinary approach. This case emphasizes the important aspects of diagnosis, antimicrobial and surgical management.
2017: IDCases
https://www.readbyqxmd.com/read/28912980/sporotrichoid-like-spread-of-cutaneous-mycobacterium-chelonae-in-an-immunocompromised-patient
#5
Daria Marley Kemp, Anusha G Govind, Jun Kang, Caroline C Brugger, Young C Kauh
Mycobacterium chelonae is a rapidly growing mycobacterium found in water and soil that can cause local cutaneous infections in immunocompetent hosts but more frequently affects immunocompromised patients. Typically, patients will present with painful subcutaneous nodules of the joints or soft tissues from traumatic inoculation. However, exhibiting a sporotrichoid-like pattern of these nodules is uncommon. Herein, we report a case of sporotrichoid-like distribution of cutaneous Mycobacterium chelonae in a patient with systemic lupus erythematosus on significant immunosuppressive medications...
2017: Case Reports in Dermatological Medicine
https://www.readbyqxmd.com/read/28895525/description-of-mycobacterium-chelonae-subsp-bovis-subsp-nov-isolated-from-cattle-bos-taurus-coreanae-emended-description-of-mycobacterium-chelonae-and-creation-of-mycobacterium-chelonae-subsp-chelonae-subsp-nov
#6
Byoung-Jun Kim, Ga-Na Kim, Bo-Ram Kim, Che Ok Jeon, Joseph Jeong, Seon Ho Lee, Ji-Hun Lim, Seung-Heon Lee, Chang Ki Kim, Yoon-Hoh Kook, Bum-Joon Kim
Three rapidly growing mycobacterial strains, QIA-37T, QIA-40 and QIA-41, were isolated from the lymph nodes of three separate Korean native cattle, Hanwoo (Bos taurus coreanae). These strains were previously shown to be phylogenetically distinct but closely related to Mycobacterium chelonae ATCC 35752T by taxonomic approaches targeting three genes (16S rRNA, hsp6 and rpoB) and were further characterized using a polyphasic approach in this study. The 16S rRNA gene sequences of all three strains showed 99.7 % sequence similarity with that of the M...
September 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28879868/mycobacterium-chelonae-infection-complicating-traumatic-and-surgical-wounds-a-case-series
#7
Soumya Jagadeesan, V Anilkumar, Vinitha Varghese Panicker, Gopikrishnan Anjaneyan, Jacob Thomas
Mycobacterium chelonae is a rapidly growing non-tuberculous mycobacterium. The skin and soft tissue infections due to this organism are steadily on the rise and need to be delineated specifically as most of these are not responsive to routine antituberculosis treatment. Here, we report 3 different presentations caused by Mycobacterium chelonae in traumatic and surgical wounds. Mycobacterium chelonae can complicate surgical or traumatic wounds.This infection may also present as injection site abscesses. Diabetics on insulin injections are especially at risk...
September 6, 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/28857733/mycobacterium-stephanolepidis-sp-nov-a-rapidly-growing-species-related-to-mycobacterium-chelonae-isolated-from-marine-teleost-fish-stephanolepis-cirrhifer
#8
Hanako Fukano, Shinpei Wada, Osamu Kurata, Kinya Katayama, Nagatoshi Fujiwara, Yoshihiko Hoshino
A previously undescribed rapidly growing, non-pigmented mycobacterium was identified based on biochemical and nucleic acid analyses, as well as growth characteristics. Seven isolates were cultured from samples collected from five thread-sail filefish (Stephanolepis cirrhifer) and two farmed black scraper (Thamnaconus modestus). Bacterial growth occurred at 15-35 °C on Middlebrook 7H11 agar. The bacteria were positive for catalase activity at 68 °C and urease activity, intermediate for iron uptake, and negative for Tween 80 hydrolysis, nitrate reduction, semi-quantitative catalase activity and arylsulfatase activity at day 3...
August 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28855835/distribution-of-non-tuberculosis-mycobacteria-strains-from-suspected-tuberculosis-patients-by-heat-shock-protein-65-pcr-rflp
#9
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/28818905/complete-genome-sequence-of-mycobacterium-stephanolepidis
#10
Hanako Fukano, Mitsunori Yoshida, Yukie Katayama, Tsutomu Omatsu, Tetsuya Mizutani, Osamu Kurata, Shinpei Wada, Yoshihiko Hoshino
Mycobacterium stephanolepidis is a rapid-growing nonpigmented species isolated from marine teleost fish (Stephanolepis cirrhifer) and is closely related to Mycobacterium chelonae Here, we report the complete sequence of its genome, comprising a 4.9-Mb chromosome. The sequence represents essential data for future phylogenetic and comparative genome studies of this fish pathogen.
August 17, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28817307/geographic-distribution-of-nontuberculous-mycobacterial-species-identified-among-clinical-isolates-in-the-united-states-2009-2013
#11
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/28769591/an-unusual-case-of-spontaneous-mycobacterium-chelonae-corneal-ulcer-in-a-healthy-middle-aged-adult-retraction
#12
(no author information available yet)
[This retracts the article on p. 121 in vol. 9, PMID: 27274315.].
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28754065/acute-disseminated-mycobacteriosis-in-captive-atlantic-guitarfish-rhinobatos-lentiginosus
#13
Kathryn A Tuxbury, Samuel A Young, Daniel S Bradway, Jamie L Marola, Max Salfinger, Michael M Garner
An adult female captive-born Atlantic guitarfish ( Rhinobatos lentiginosus) was found acutely moribund on exhibit and died soon after presentation. Abnormalities on autopsy were focal cutaneous erythema on the tail, a small liver, many variably sized friable ovarian follicles, and coelomic effusion. Histologic examination revealed systemic bacterial embolization, and yolk coelomitis with minimal associated inflammation and some mineralization. Bacterial culture of blood and coelomic effusion grew a rapidly growing Mycobacterium species that was further identified as Mycobacterium chelonae by PCR amplification and sequencing of the RNA polymerase subunit beta ( rpoB) gene of isolated genomic DNA...
November 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28724491/comparison-of-antemortem-and-environmental-samples-for-zebrafish-health-monitoring-and-quarantine
#14
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
#15
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/28662943/discovery-of-novel-antimycobacterial-drug-therapy-in-biofilm-of-pathogenic-nontuberculous-mycobacterial-keratitis
#16
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/28545813/design-synthesis-and-evaluation-of-indole-2-carboxamides-with-pan-anti-mycobacterial-activity
#17
Nicholas D Franz, Juan Manuel Belardinelli, Michael A Kaminski, Louis C Dunn, Vinicius Calado Nogueira de Moura, Michael A Blaha, Dan D Truong, Wei Li, Mary Jackson, E Jeffrey North
Current treatment regimens for non-tuberculous mycobacteria (NTM) and tuberculosis (TB) generally require long duration of therapy with multiple drugs, some of which are broad spectrum antibiotics. Despite some advances in antimicrobial compounds, there remains a need in therapy for antibiotics with specific mycobacterial targets. It has been shown that MmpL3 is an essential transporter required for the translocation of mycolic acids to the mycobacterial cell envelope. Here, we synthesized a series of indole-2-carboxamides that inhibit MmpL3 and have potent pan-activity against mycobacterial species...
July 15, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28541806/atypical-wound-pathogens
#18
Philip S Barie
BACKGROUND: Atypical wound pathogens may be so described because they are uncommon pathogens of soft tissue among human beings, or because they may be fastidious and difficult to recover/isolate in the laboratory. METHODS: A review of pertinent English-language literature was performed. RESULTS: These wound pathogens are a diverse lot, including aerobic and anaerobic gram-positive and gram-negative bacilli, non-tuberculous mycobacteria, and bacteria that cannot be characterized conventionally because they lack a cell wall (the Mycoplasmataceae)...
May 2017: Surgical Infections
https://www.readbyqxmd.com/read/28533767/characterization-of-mycobacterium-chelonae-like-strains-by-comparative-genomics
#19
Christiane L Nogueira, Luiz G P de Almeida, Maria C Menendez, Maria J Garcia, Luciano A Digiampietri, Erica Chimara, Margo Cnockaert, Juan C Palomino, Françoise Portaels, Anandi Martin, Peter Vandamme, Sylvia C Leão
Isolates of the Mycobacterium chelonae-M. abscessus complex are subdivided into four clusters (CHI to CHIV) in the INNO-LiPA® Mycobacterium spp DNA strip assay. A considerable phenotypic variability was observed among isolates of the CHII cluster. In this study, we examined the diversity of 26 CHII cluster isolates by phenotypic analysis, drug susceptibility testing, whole genome sequencing and single-gene analysis. Pairwise genome comparisons were performed using several approaches, including average nucleotide identity (ANI) and genome-to-genome distance (GGD) among others...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28526906/mycobacterium-chelonae-infection-of-the-buttocks-secondary-to-lipofilling-a-case-report-and-review-of-the-literature
#20
Sarah E Hammond, Ahmed Al-Bayati, Natalie Joumblat, Christopher J Salgado
Mycobacterium chelonae is a nontuberculous mycobacterium, classified as a Runyon type IV mycobacterium. In relation to humans, it is most commonly associated with tissue trauma or pulmonary infections. The majority of medical reports describe finding M. chelonae in the surgical setting, attributing infection to inadequate sterilization of surgical equipment. Symptoms are often nonspecific and include pain, erythema, and draining subcutaneous nodules and skin lesions. Therefore, the diagnosis of M. chelonae is often difficult to establish without prior suspicion of the disease, but can be confirmed with culture...
May 19, 2017: Aesthetic Plastic Surgery
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