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https://www.readbyqxmd.com/read/28317808/isolation-and-characterization-of-nontuberculous-mycobacteria-from-patients-with-pulmonary-tuberculosis-in-ghana
#1
Isaac Darko Otchere, Adwoa Asante-Poku, Stephen Osei-Wusu, Samuel Yaw Aboagye, Dorothy Yeboah-Manu
OBJECTIVE/BACKGROUND: Nontuberculous mycobacterial (NTM) species are assuming public health importance in pulmonary diseases; they are increasingly being isolated, and importantly, most NTMs do not respond to routine tuberculosis (TB) drugs. This study aimed to identify NTMs isolated from pulmonary TB cases and also determine their susceptibility to streptomycin (STR), isoniazid (INH), and rifampicin (RIF). METHODS: A total of 1755 mycobacterial isolates, obtained between August 2012 and July 2014, from 2036 smear-positive pulmonary cases were identified using polymerase chain reaction amplification of IS6110, and hsp65 gene sequencing analysis...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317807/tetrahydro-2-furanyl-2-4-1h-3h-pyrimidinedione-derivatives-as-novel-antibacterial-compounds-against-mycobacterium
#2
Yuji Koseki, Hironori Kanetaka, Joji Tsunosaki, Héléne Munier-Lehmann, Shunsuke Aoki
OBJECTIVE/BACKGROUND: Mycobacterium tuberculosis thymidine monophosphate kinase (mtTMPK) is a potential enzymatic target for the treatment of tuberculosis (TB). MATERIALS AND METHODS: In this study, we performed pharmacophore-based in silico screening, targeting mtTMPK with a compound library of 461,383 chemicals. We evaluated the candidate compounds for inhibitory effects on the growth of the model mycobacteria, Mycobacterium smegmatis. RESULTS: The compound KTP3 completely inhibited the growth of M...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317798/nontuberculous-mycobacterial-species-and-mycobacterium-tuberculosis-complex-coinfection-in-patients-with-pulmonary-tuberculosis-in-dr-soetomo-hospital-surabaya-indonesia
#3
Ni Made Mertaniasih, Deby Kusumaningrum, Eko Budi Koendhori, Tutik Kusmiati, Desak Nyoman Surya Suameitria Dewi
OBJECTIVE/BACKGROUND: The aim of this study was to analyze the detection of nontuberculous mycobacterial (NTM) species derived from sputum specimens of pulmonary tuberculosis (TB) suspects. Increasing prevalence and incidence of pulmonary infection by NTM species have widely been reported in several countries with geographical variation. MATERIALS AND METHODS: Between January 2014 and September 2015, sputum specimens from chronic pulmonary TB suspect patients were analyzed...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28317629/mycobacterium-kansasii-infection-in-a-patient-receiving-biologic-therapy-not-all-reactive-interferon-gamma-release-assays-are-tuberculosis
#4
Nasir Saleem, Raya Saba, Srikanth Maddika, Mitchell Weinstein
Mycobacterium kansasii, a nontuberculous mycobacterium, can lead to lung disease similar to tuberculosis. Immunotherapeutic biologic agents predispose to infections with mycobacteria, including M kansasii. T-cell-mediated interferon gamma release assays like QuantiFERON-TB Gold Test (QFT) are widely used by clinicians for the diagnosis of infections with Mycobacterium tuberculosis; however, QFT may also show positive result with certain nontuberculous mycobacterial infections. We report a case of M kansasii pulmonary infection, with a positive QFT, in an immunocompromised patient receiving prednisone, leflunomide and tocilizumab, a humanized anti-interleukin-6 receptor monoclonal antibody...
April 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28317400/nanodiagnostics-for-tuberculosis-detection
#5
Hesham El-Samadony, Asma Althani, Mohamed Awad Tageldin, Hassan M E Azzazy
Introduction Tuberculosis (TB) is a leading killer worldwide. End TB strategy aims at ending the TB epidemic by 2030. Early, accurate, and affordable diagnosis represents a cornerstone to achieve this goal. Innovative strategies for TB diagnostics have been introduced, however the ideal assay is yet unavailable and conventional methods remain necessary for diagnosis. Unique properties of nanoparticles (NPs) have allowed their utilization in TB detection via targeting disease biomarkers. Area Covered Until now, around thirty-five TB NP-based assays have been partially or fully characterized...
March 20, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28306733/hypervirulent-mycobacterium-tuberculosis-strain-triggers-necrotic-lung-pathology-associated-with-enhanced-recruitment-of-neutrophils-in-resistant-c57bl-6-mice
#6
Fabrício M Almeida, Thatiana L B Ventura, Eduardo P Amaral, Simone C M Ribeiro, Sanderson D Calixto, Marcelle R Manhães, Andreza L Rezende, Giliane S Souzal, Igor S de Carvalho, Elisangela C Silva, Juliana Azevedo da Silva, Eulógio C Q Carvalho, Afranio L Kritski, Elena B Lasunskaia
Tuberculosis (TB) is a chronic infectious disease caused by Mycobacterium tuberculosis (Mtb) that in most cases induces irreversible necrosis of lung tissue as a result of excessive inflammatory reactions. The murine model of TB in resistant C57BL/6 mice infected with reference Mtb strains is widely used in TB studies; however, these mice do not show a necrotic pathology, which restricts their use in studies of irreversible tissue damage. Recently, we demonstrated that necrotic lung lesions could be induced in the C57BL/6 mice by highly virulent Mtb strains belonging to the modern Beijing sublineage...
2017: PloS One
https://www.readbyqxmd.com/read/28303132/mycobacterium-abscessus-subsp-abscessus-is-capable-of-degrading-pseudomonas-aeruginosa-quinolone-signals
#7
Franziska S Birmes, Timo Wolf, Thomas A Kohl, Kai Rüger, Franz Bange, Jörn Kalinowski, Susanne Fetzner
Pseudomonas aeruginosa employs 2-heptyl-3-hydroxy-4(1H)-quinolone (the Pseudomonas quinolone signal, PQS) and 2-heptyl-4(1H)-quinolone (HHQ) as quorum sensing signal molecules, which contribute to a sophisticated regulatory network controlling the production of virulence factors and antimicrobials. We demonstrate that Mycobacterium abscessus(T) and clinical M. abscessus isolates are capable of degrading these alkylquinolone signals. Genome sequences of 50 clinical M. abscessus isolates indicated the presence of aqdRABC genes, contributing to fast degradation of HHQ and PQS, in M...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28297817/-distribution-and-drug-resistance-of-nontuberculous-mycobacteria-in-beijing
#8
J Zhang, J R Su, B C Ding, J W Liu, J L Yi, X Y Yang, N H Wang, S M Wang
Objective: To analyze the distribution and drug resistance of nontuberculous mycobacteria(NTM) in Beijing. Methods: Using PCR-fluorescence probe method we identified 1 552 mycobacterial isolates in 2009 and 1 553 mycobacterial isolates in 2013, which were stored by Beijing Research Institute for Tuberculosis Control.All identified NTM strains were confirmed by 16S rRNA gene sequencing, and drug sensitivity testing was performed by using 1% ratio method.SPSS 13.0 was used for statistical analysis. Results: The isolation rate for NTM in 2009 and 2013 was 3...
March 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28296394/longitudinal-and-source-to-tap-new-orleans-la-usa-drinking-water-microbiology
#9
Natalie Marie Hull, Eric P Holinger, Kimberly A Ross, Charles E Robertson, J Kirk Harris, Mark J Stevens, Norman R Pace
The two municipal drinking water systems of New Orleans, LA, USA were sampled to compare microbiology of independent systems that treat the same surface water from the Mississippi River. To better understand temporal trends and sources of microbiology delivered to taps, these treatment plants and distribution systems were subjected to source-to-tap sampling over four years. Both plants employ traditional treatment by chloramination, applied during or after settling, followed by filtration before distribution in a warm, low water age system...
March 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28292541/mycobacterial-musculoskeletal-infections
#10
REVIEW
John I Hogan, Rocío M Hurtado, Sandra B Nelson
Although less common as causes of musculoskeletal infection than pyogenic bacteria, both Mycobacterium tuberculosis and nontuberculous mycobacteria can infect bones and joints. Although tuberculous arthritis and osteomyelitis have been recognized for millennia, infections caused by nontuberculous mycobacteria are being identified more often, likely because of a more susceptible host population and improvements in diagnostic capabilities. Despite advances in modern medicine, mycobacterial infections of the musculoskeletal system remain particularly challenging to diagnose and manage...
March 11, 2017: Infectious Disease Clinics of North America
https://www.readbyqxmd.com/read/28291784/comparative-genome-analyses-of-mycobacteria-give-better-insights-into-their-evolution
#11
Wei Yee Wee, Avirup Dutta, Siew Woh Choo
Mycobacteria a genus of Actinobacteria are widespread in nature ranging from soil-dwelling saprophytes to human and animal pathogens. The rate of growth has been a classifying factor for the Mycobacterium spp., dividing them into the rapid growers and the slow growers. Here we have performed a comparative genome study of mycobacterial species in order to get better understanding of their evolution, particularly to understand the distinction between the rapid and slow growers. Our study shows that the slow growers had generally gained and lost more genes compared to the rapid growers...
2017: PloS One
https://www.readbyqxmd.com/read/28288970/mycobacterium-tuberculosis-cpn60-2-groel2-blocks-macrophage-apoptosis-via-interaction-with-mitochondrial-mortalin
#12
Sunil Joseph, Alex Yuen, Vijender Singh, Zakaria Hmama
Earlier studies suggested that Mycobacterium tuberculosis (Mtb) proteins exported within the host macrophage play an essential role in tuberculosis pathogenesis. In fact, Mtb proteins interact with and deactivate key regulators of many macrophage functions such as phago-lysosome fusion and antigen presentation, resulting in the intracellular persistence of pathogenic mycobacteria. Cpn60.2 is an abundant Mtb chaperone protein, restricted to cell cytoplasm and surface, that was reported to be essential for bacterial growth...
March 13, 2017: Biology Open
https://www.readbyqxmd.com/read/28287534/rapid-one-step-enzymatic-synthesis-and-all-aqueous-purification-of-trehalose-analogues
#13
Lisa M Meints, Anne W Poston, Brent F Piligian, Claire D Olson, Katherine S Badger, Peter J Woodruff, Benjamin M Swarts
Chemically modified versions of trehalose, or trehalose analogues, have applications in biology, biotechnology, and pharmaceutical science, among other fields. For instance, trehalose analogues bearing detectable tags have been used to detect Mycobacterium tuberculosis and may have applications as tuberculosis diagnostic imaging agents. Hydrolytically stable versions of trehalose are also being pursued due to their potential for use as non-caloric sweeteners and bioprotective agents. Despite the appeal of this class of compounds for various applications, their potential remains unfulfilled due to the lack of a robust route for their production...
February 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28287416/novel-pharmacological-activity-of-artesunate-and-artemisinin-their-potential-as-anti-tubercular-agents
#14
Won Hyung Choi
Tuberculosis is a major infectious disease that globally causes the highest human mortality. From this aspect, this study was carried out to evaluate novel pharmacological activities/effects of artesunate and artemisinin causing anti-tubercular activity/effects against Mycobacterium tuberculosis (Mtb). The anti-Mtb activities/effects of artesunate and artemisinin were evaluated using different anti-Mtb indicator assays, such as the resazurin microtiter assay, the Mycobacteria Growth Indicator Tube (MGIT) 960 system assay, and the Ogawa slant medium assay, as well as in vivo tests...
March 10, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28287297/multifaceted-role-of-lipids-in-mycobacterium-leprae
#15
Gurkamaljit Kaur, Jagdeep Kaur
Mycobacterium leprae must adopt a metabolic strategy and undergo various metabolic alterations upon infection to survive inside the human body for years in a dormant state. A change in lipid homeostasis upon infection is highly pronounced in Mycobacterium leprae. Lipids play an essential role in the survival and pathogenesis of mycobacteria. Lipids are present in several forms and serve multiple roles from being a source of nutrition, providing rigidity, evading the host immune response to serving as virulence factors, etc...
March 2017: Future Microbiology
https://www.readbyqxmd.com/read/28286681/granulomatous-lobular-mastitis-associated-with-mycobacterium-abscessus-in-south-china-a-case-report-and-review-of-the-literature
#16
Ye-Sheng Wang, Qi-Wei Li, Lin Zhou, Run-Feng Guan, Xiang-Ming Zhou, Ji-Hong Wu, Nan-Yan Rao, Shuang Zhu
Mycobacteria, which are known as rapidly growing bacteria, are pathogens that are responsible for cutaneous or subcutaneous infections that especially occur after injection, trauma, or surgery. In this report, we describe a species of Mycobacterium abscessus that was isolated from a breast abscess in a patient who was previously diagnosed with granulomatous lobular mastitis (GLM). This current case is the first ever presented case of GLM associated with M. abscessus documented in South China. The case presentation highlights the role of M...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28282458/transcriptome-analysis-of-mycobacteria-in-sputum-samples-of-pulmonary-tuberculosis-patients
#17
Sumedha Sharma, Michelle B Ryndak, Ashutosh N Aggarwal, Rakesh Yadav, Sunil Sethi, Shet Masih, Suman Laal, Indu Verma
Pulmonary tuberculosis, the disease caused by Mycobacterium tuberculosis, still retains a top rank among the deadliest communicable diseases. Sputum expectorated during the disease continues to be a primary diagnostic specimen and also serves as a reservoir of bacteria. The expression pattern of mycobacteria in sputum will lead to an insight into bacterial adaptation at the most highly transmissible stage of infection and can also help in identifying newer diagnostic as well as drug targets. Thus, in the present study, a whole genome microarray of Mycobacterium tuberculosis was used to elucidate the transcriptional profile of mycobacteria in the sputum samples of smear positive pulmonary tuberculosis patients...
2017: PloS One
https://www.readbyqxmd.com/read/28281912/naphthofuroquinone-derivatives-show-strong-antimycobacterial-activities-against-drug-resistant-mycobacteria
#18
Woong Sik Jang, Young-Sang Choi, Sukyung Kim, Md Anirban Jyoti, Hoonhee Seo, Juhye Han, Yong-Sik Kim, Jiwon Lyu, Kung-Woo Nam, Byung-Eui Lee, Kee-In Lee, Ho-Yeon Song
Tuberculosis, one of the world's major health problems, has become more serious due to the emergence of multi-drug resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis (MTB). In this study, we performed three anti-MTB assays to evaluate the anti-mycobacterial activity of naphthofuroquinone derivatives against drug-resistant MTB. Among them, methyl 5-[2-(dimethylamino)ethoxy]-7,12-dioxo-7,12-dihydrodinaphtho[1,2-b:2',3'-d]furan-6-carboxylate (DFC2) exhibited strong anti-mycobacterial activity against MTB H37Ra, H37Rv and four drug-resistant MTB strains...
March 10, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28281163/effect-of-mycobacterium-avium-subsp-paratuberculosis-map-infection-on-the-diagnostic-accuracy-for-mycobacterium-bovis-m-bovis-infection-under-field-conditions-in-cattle-belonging-to-low-m-bovis-prevalence-herds
#19
E Raffo, P Steuer, G Monti, M Salgado
Currently, the Chilean authority has implemented a National Eradication Program for bovine tuberculosis (bTB), aimed at controlling and eradicating the disease in Chile. The area under study has a low within-herd prevalence, has a relatively low number of infected herds, and is one of the major milk and beef producing areas in the country. However, so far, no attempts at eradicating the disease have been successful. It has been suggested that the diagnostic tests used were either not sensitive or specific enough...
March 10, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28280641/prosthetic-joint-infection-due-to-mycobacterium-avium-intracellulare-in-a-patient-with-rheumatoid-arthritis-a-case-report-and-review-of-the-literature
#20
Nicholas E Ingraham, Brenton Schneider, Jonathan D Alpern
Nontuberculous mycobacteria (NTM) are a rare cause of prosthetic joint infections (PJI). However, the prevalence of NTM infections may be increasing with the rise of newer immunosuppressive medications such as biologics. In this case report, we describe a rare complication of immunosuppressive therapies and highlight the complexity of diagnosing and treating PJI due to NTM. The patient is a 79-year-old Caucasian male with a history of severe destructive rheumatoid arthritis on several immunosuppressive agents and right hip osteoarthritis s/p total hip arthroplasty 15 years previously with several complex revisions, presenting with several weeks of worsening right hip and abdominal pain...
2017: Case Reports in Infectious Diseases
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