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https://www.readbyqxmd.com/read/27915421/the-frequency-and-treatment-of-pneumothorax-associated-with-pulmonary-nontuberculous-mycobacterial-infection
#1
Masaki Ikeda, Koji Takahashi, Teruya Komatsu, Toru Tanaka, Tatsuo Kato, Takuji Fujinaga
OBJECTIVES: Characteristics of pneumothorax associated with nontuberculous mycobacterium (NTM) infection are rarely reported, especially in terms of surgical treatments. Our objectives were to show the tendency and clinical courses of pneumothorax due to NTM and discuss the way of therapy in our hospital. METHODS: We retrospectively analyzed 557 patients with NTM infection over a period of 5 years at the Nagara Medical Center. RESULTS: A total of 12 out of the 557 patients (2...
December 3, 2016: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27915187/dose-response-models-and-a-quantitative-microbial-risk-assessment-framework-for-the-mycobacterium-avium-complex-that-account-for-recent-developments-in-molecular-biology-taxonomy-and-epidemiology
#2
REVIEW
Kerry A Hamilton, Mark H Weir, Charles N Haas
Mycobacterium avium complex (MAC) is a group of environmentally-transmitted pathogens of great public health importance. This group is known to be harbored, amplified, and selected for more human-virulent characteristics by amoeba species in aquatic biofilms. However, a quantitative microbial risk assessment (QMRA) has not been performed due to the lack of dose response models resulting from significant heterogeneity within even a single species or subspecies of MAC, as well as the range of human susceptibilities to mycobacterial disease...
November 24, 2016: Water Research
https://www.readbyqxmd.com/read/27915106/insights-gained-from-ancient-biomolecules-into-past-and-present-tuberculosis-a-personal-perspective
#3
REVIEW
Helen D Donoghue
Ancient and historical tuberculosis (TB) can be recognized by its typical paleopathology in human remains. Using paleomicrobiology, it is possible to detect many more individuals infected with TB but with no visible lesions. Due to advances in molecular analysis over the past two decades, it is clear that TB was widespread in humans from the Neolithic period until the present day. Past human populations were associated with different lineages of the Mycobacterium tuberculosis (MTB) complex, thereby elucidating early human migrations...
November 30, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27914798/antimycobacterial-activity-of-novel-hydrazide-hydrazone-derivatives-with-2h-chromene-and-coumarin-scaffold
#4
Violina T Angelova, Violeta Valcheva, Nikolay G Vassilev, Rosen Buyukliev, Georgi Momekov, Ivan Dimitrov, Luciano Saso, Mirjana Djukic, Boris Shivachev
This study reports the synthesis of new 2H-chromene or coumarin based acylhydrazones, which were evaluated for their in vitro antimycobacterial activity against reference strain Mycobacterium tuberculosis H37Rv and compared to the first-line antituberculosis drugs, isoniazid (INH) and ethambutol (EMB). The most active compounds 7m (MIC 0.13μM), 7o (MIC 0.15μM) and 7k (MIC 0.17μM) demonstrated antimycobacterial activity at submicromolar concentration level and remarkably minimal associated cytotoxicity in the human embryonic kidney cell line HEK-293T...
November 25, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27914741/maternal-bcg-scar-is-associated-with-increased-infant-proinflammatory-immune-responses
#5
Patrice Akusa Mawa, Emily L Webb, Abdelali Filali-Mouhim, Gyaviira Nkurunungi, Rafick-Pierre Sekaly, Swaib Abubaker Lule, Sarah Prentice, Stephen Nash, Hazel M Dockrell, Alison M Elliott, Stephen Cose
INTRODUCTION: Prenatal exposures such as infections and immunisation may influence infant responses. We had an opportunity to undertake an analysis of innate responses in infants within the context of a study investigating the effects of maternal mycobacterial exposures and infection on BCG vaccine-induced responses in Ugandan infants. MATERIAL AND METHODS: Maternal and cord blood samples from 29 mother-infant pairs were stimulated with innate stimuli for 24h and cytokines and chemokines in supernatants were measured using the Luminex® assay...
November 30, 2016: Vaccine
https://www.readbyqxmd.com/read/27914739/infection-by-mycobacterium-bovis-in-a-dog-from-brazil
#6
Vivianne Cambuí Figueiredo Rocha, Salomão Cambuí de Figueiredo, Cesar Alejandro Rodriguez Rosales, Camila Dias Porto, Julio Lopes Sequeira, José Soares Ferreira Neto, Antônio Carlos Paes, Vanessa Riesz Salgado
Tuberculosis (TB) is a chronic disease caused by bacteria belonging to the Mycobacterium tuberculosis complex (MtbC). This disease rarely affects dogs. Canine infections are usually caused by M. tuberculosis. Mycobacterium bovis infections are rare in dogs and associated with consumption of raw milk or contaminated products. Here, we report a Boxer dog who had a M. bovis infection and was admitted to a Brazilian veterinary hospital with a presumptive diagnosis of chronic ehrlichiosis. Despite receiving treatment for chronic ehrlichiosis, it progressed to death...
October 3, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27914363/new-insights-into-the-sar-and-drug-combination-synergy-of-2-quinolin-4-yloxy-acetamides-against-mycobacterium-tuberculosis
#7
Bruno Couto Giacobbo, Kenia Pissinate, Valnês Rodrigues-Junior, Anne Drumond Villela, Estêvão Silveira Grams, Bruno Lopes Abbadi, Fernanda Teixeira Subtil, Nathalia Sperotto, Rogério Valim Trindade, Davi Fernando Back, Maria Martha Campos, Luiz Augusto Basso, Pablo Machado, Diógenes Santiago Santos
2-(Quinolin-4-yloxy)acetamides have been described as potent and selective in vitro inhibitors of Mycobacterium tuberculosis (Mtb) growth. Herein, a new series of optimized compounds were found to demonstrate highly potent antitubercular activity, with minimum inhibitory concentration (MIC) values against drug-susceptible and drug-resistant Mycobacterium tuberculosis strains in the submicromolar range. Furthermore, the most active compounds had no apparent toxicity to mammalian cells, and they showed intracellular activities similar to those of isoniazid and rifampin in a macrophage model of Mtb infection...
November 23, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27914088/murine-mycobacterium-marinum-infection-as-a-model-for-tuberculosis
#8
Julia Lienard, Fredric Carlsson
Mycobacteria are a major human health problem globally. Regarding tuberculosis the situation is worsened by the poor efficacy of current vaccine regimens and by emergence of drug-resistant strains (Manjelievskaia J et al, Trans R Soc Trop Med Hyg 110: 110, 2016; Pereira et al., Lancet Infect Dis 12:300-306, 2012; http://www.who.int/tb/publications/global_report/en/) undermining both disease-prevention and available treatments. Thus, increased basic understanding of mycobacterial-and particularly Mycobacterium tuberculosis-virulence strategies and pathogenesis is of great importance...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27913648/cd36-mediated-uptake-of-surfactant-lipids-by-human-macrophages-promotes-intracellular-growth-of-mycobacterium-tuberculosis
#9
Claire E Dodd, Charlie J Pyle, Rebecca Glowinski, Murugesan V S Rajaram, Larry S Schlesinger
Mycobacterium tuberculosis imposes a large global health burden as the airborne agent of tuberculosis. Mycobacterium tuberculosis has been flourishing in human populations for millennia and is therefore highly adapted to the lung environment. Alveolar macrophages, a major host cell niche for M. tuberculosis, are not only phagocytose inhaled microbes and particulate matter but are also crucial in catabolizing lung surfactant, a lipid-protein complex that lines the alveolar spaces. Because macrophage host defense properties can be regulated by surfactant and M...
December 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27913043/evaluation-of-the-genexpert-mtb-rif-assay-on-extrapulmonary-and-respiratory-samples-other-than%C3%A2-sputum-a-low-burden-country-experience
#10
Sushil Pandey, Jacob Congdon, Bradley McInnes, Alina Pop, Christopher Coulter
The aim of this study was to assess the performance of the GeneXpert MTB/RIF assay on extrapulmonary (EP) and respiratory (non-sputum) clinical samples of patients suspected of having tuberculosis (TB) from Queensland, Australia. A total of 269 EP and respiratory (non-sputum) clinical samples collected from Qld patients who were suspected of having TB were subjected to the GeneXpert MTB/RIF analysis, Ziehl-Neelsen (ZN) staining, Mycobacterium tuberculosis (MTB) culture and drug susceptibility testing. Phenotypic and genotypic data were compared...
November 29, 2016: Pathology
https://www.readbyqxmd.com/read/27911922/nucleic-acid-amplification-testing-and-sequencing-combined-with-acid-fast-staining-in-needle-biopsy-lung-tissues-for-the-diagnosis-of-smear-negative-pulmonary-tuberculosis
#11
Faming Jiang, Weiwei Huang, Ye Wang, Panwen Tian, Xuerong Chen, Zongan Liang
BACKGROUND: Smear-negative pulmonary tuberculosis (PTB) is common and difficult to diagnose. In this study, we investigated the diagnostic value of nucleic acid amplification testing and sequencing combined with acid-fast bacteria (AFB) staining of needle biopsy lung tissues for patients with suspected smear-negative PTB. METHODS: Patients with suspected smear-negative PTB who underwent percutaneous transthoracic needle biopsy between May 1, 2012, and June 30, 2015, were enrolled in this retrospective study...
2016: PloS One
https://www.readbyqxmd.com/read/27910720/the-management-of-infection-with-mycobacterium-tuberculosis-in-young-children-post-2015-an-opportunity-to-close-the-policy-practice-gap
#12
Stephen M Graham
The treatment of infection with Mycobacterium tuberculosis in young children is supported by universal policy based on strong rationale and evidence of effectiveness, but has rarely been implemented in tuberculosis endemic countries. Areas covered: This review highlights a number of important recent developments that provide an unprecedented opportunity to close the policy-practice gap, as well as ongoing needs to facilitate implementation under programmatic conditions and scale-up. Expert commentary: The WHO's End TB Strategy and Stop TB Partnership's Plan to End TB provide ambitious targets for prevention at a time when National Tuberculosis Programs in tuberculosis endemic countries are increasing attention to the challenges of management and prevention of tuberculosis disease in children...
December 2, 2016: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/27909685/persistent-immune-thrombocytopenia-heralds-the-diagnosis-of-mycobacterium-chimaera-prosthetic-valve-endocarditis
#13
Keith A Sacco, M Caroline Burton
A 63 year old female was admitted for investigation of worsening renal insufficiency. During hospitalization she developed persistent immune thrombocytopenia refractory to supportive or immunosuppressive treatment. She was diagnosed with Mycobacterium chimaera prosthetic valve endocarditis and thrombocytopenia resolved with anti-mycobacterial therapy.
2017: IDCases
https://www.readbyqxmd.com/read/27909634/nontuberculous-mycobacteria-lymphadenitis-a-case-report
#14
Amanda M Krantz, Meera Varnam, Cristina Fernandez
Atypical mycobacteria, also known as nontuberculous mycobacteria (NTM) includes acid-fast bacteria other than Mycobacterium tuberculosis. NTM can be isolated from a variety of environmental sources including water, food products, domestic animals, and soil; human exposure is typically from soil to the oral cavity and respiratory tract. Diagnosis of NTM is suspected in children less than five years old with subacute, unilateral, non-tender cervicofacial lymphadenitis in combination with a history of water exposure, penetrating injection, as well as negative routine cultures or response to antistaphylococcal and antistreptococcal antibiotics...
October 25, 2016: Curēus
https://www.readbyqxmd.com/read/27909431/the-microbiota-of-recreational-freshwaters-and-the-implications-for-environmental-and-public-health
#15
Chang Soo Lee, Minseok Kim, Cheonghoon Lee, Zhongtang Yu, Jiyoung Lee
The microbial communities in recreational freshwaters play important roles in both environmental and public health perspectives. In this study, the bacterial community structure and its associations with freshwater environments were investigated by analyzing the summertime microbiomes of three beach waters in Ohio (East Fork, Delaware, and Madison lakes) together with environmental and microbial water quality parameters. From the swimming season of 2009, 21 water samples were collected from the three freshwater beaches...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27908321/-mycobacterium-marinum-infektion
#16
Lykke Larsen, Isik Somuncu Johansen
No abstract text is available yet for this article.
November 28, 2016: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/27908271/host-directed-therapeutics-against-mycobacterial-infections
#17
Haruaki Tomioka, Chiaki Sano, Yutaka Tatano
The high incidence of tuberculosis (TB) in the world, especially in developing countries, the resurgence of TB in industrialized countries, and the global increase in the prevalence of Mycobacterium avium complex infections in immunocompromised hosts have prompted the quest for novel antimycobacterial drugs. However, the development of such antimicrobial chemotherapeutics is currently making very slow progress even with using the bioinformatics-based methodology for drug design. It thus appears that devising improved administration protocols for clinical treatment against intractable mycobacterial infections using existing chemotherapeutics is more practical than awaiting the development of new antimycobacterial drugs...
December 2, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27908268/synthesis-of-new-fluoro-benzimidazole-derivatives-as-an-approach-towards-the-discovery-of-novel-intestinal-antiseptic-drug-candidates
#18
Ulviye Acar, Begüm Nurpelin Sağlık, Yusuf Özkay, Zerrin Cantürk, Juan Bueno, Fatih Demirci
In the present study, nineteen new fluoro-benzimidazole derivatives, including nifuroxazide analogues, were synthesized by microwave-supported reactions and tested against a panel of pathogenic microorganisms consisting of resistant strains. The synthesized compounds were characterised and identified by FT-IR, 1H- and 13C-NMR, mass spectroscopy, and elemental analyses, respectively. In vitro antimicrobial and cytotoxic effects of the synthesized compounds were determined by microdilution and by [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] (MTT) assay...
December 1, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27907875/s-substituted-3-5-dinitrophenyl-1-3-4-oxadiazole-2-thiols-and-tetrazole-5-thiols-as-highly-efficient-antitubercular-agents
#19
Galina Karabanovich, Jan Němeček, Lenka Valášková, Alejandro Carazo, Klára Konečná, Jiřina Stolaříková, Alexandr Hrabálek, Oto Pavliš, Petr Pávek, Kateřina Vávrová, Jaroslav Roh, Věra Klimešová
Two new classes of antitubercular agents, namely 5-alkylsulfanyl-1-(3,5-dinitrophenyl)-1H-tetrazoles and 2-alkylsulfanyl-5-(3,5-dinitrophenyl)-1,3,4-oxadiazoles, and their structure-activity relationships are described. These compounds possessed excellent activity against Mycobacterium tuberculosis, including the clinically isolated multidrug (MDR) and extensively drug-resistant (XDR) strains, with no cross resistance with first or second-line anti-TB drugs. The minimum inhibitory concentration (MIC) values of the most promising compounds reached 0...
November 21, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27907248/mycobacterium-ulcerans-toxin-mycolactone-may-enhance-host-seeking-and-oviposition-behavior-by-aedes-aegypti-l-diptera-culicidae
#20
M L Sanders, H R Jordan, C Serewis-Pond, L Zheng, M E Benbow, P L Small, J K Tomberlin
The ecological functions of many toxins continue to remain unknown for those produced by environmental pathogens. Mycobacterium ulcerans, the causative agent of the neglected tropical disease, Buruli ulcer, produces a cytotoxic macrolide, mycolactone, whose function(s) in the environment remains elusive. Through a series of dual-choice behavior assays, we show that mycolactone may be an interkingdom cue for the yellow fever mosquito, Aedes aegypti, seeking blood-meals as well as oviposition sites. Results provide novel insight into the evolution between bacteria and potential vectors...
December 1, 2016: Environmental Microbiology
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