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https://www.readbyqxmd.com/read/28075068/binding-and-processing-of-%C3%AE-lactam-antibiotics-by-the-transpeptidase-ldtmt2-from-mycobacterium-tuberculosis
#1
Eva Maria Steiner, Gunter Schneider, Robert Schnell
β-lactam antibiotics represent a novel direction in the chemotherapy of tuberculosis that brings the peptidoglycan layer of the complex mycobacterial cell wall in focus as therapeutic target. Peptidoglycan stability in Mycobacterium tuberculosis especially during infection relies on the non-conventional peptide cross-links formed by L,D-transpeptidases. These enzymes are known to be inhibited by β-lactams, primarily carbapenems, leading to a stable covalent modification at the enzyme active site. A panel of sixteen β-lactams antibiotics was characterized by inhibition kinetics, mass spectrometry and x-ray crystallography to identify efficient compounds and study their action on the essential transpeptidase LdtMt2 ...
January 11, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28074705/an-uncommon-cause-of-sciatic-pain-tuberculous-osteomyelitis-of-the-ischial-tuberosity
#2
Pieter De Mulder, Charlotte Harth, Louis Ide, Jurgen Vallaeys, Nick Baelde, Thomas De Bo
A 66-year-old Caucasian female presented with insidious sciatic pain leading to an uncommon diagnosis of tuberculous osteomyelitis with unknown portal entry. The patient did not report a history of a previous tuberculosis (TB) infection and her chest X-ray was negative for TB. Considering TB in the differential diagnosis of a 'bone abscess', it is of paramount importance to come to a correct diagnosis. Conventional radiographs still remain the first-line imaging modality for evaluation of skeletal symptomatology...
January 11, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/28062417/pulmonary-tuberculosis-presenting-as-post-operative-fever-of-unknown-origin
#3
Patrick Bogue, Mhairi Bolland, Peter How, Harrison Benziger
Post-operative fever is common following emergency surgery. Investigation and management of post-operative fever can be challenging when a clear source of sepsis is not evident or the underlying source of infection is not recognised. We herein report a case of secondary pulmonary tuberculosis presenting as post-operative fever following emergency laparotomy for a perforated duodenal ulcer. This case of tuberculosis was diagnosed on day 41 post-operatively and prior inconclusive results meant that we relied mainly on re-visiting history and examination in order to identify 3 targeted investigations: plain chest X-ray, sputum sample and blood test...
January 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28060846/prediction-of-under-detection-of-paediatric-tuberculosis-in-the-democratic-republic-of-congo-experience-of-six-years-in-the-south-kivu-province
#4
Emmanuel André, Yvette Lufungulo Bahati, Eric Mulume Musafiri, Olivier Bahati Rusumba, Dimitri Van der Linden, Francis Zech
INTRODUCTION: In the field of tuberculosis (TB), and particularly in regard to paediatric TB (PedTB), clinical skills of health professionals play an important role in determining quality of care. In an era where novel diagnostic technologies and efficient treatment regimens are being made available for the poorest, we must not divert our attention from the importance of clinical skills, as this deliverable remains the cornerstone of individualized patient care and ultimately the best assurance for optimal use of resources...
2017: PloS One
https://www.readbyqxmd.com/read/28060545/safety-and-immunogenicity-of-adenovirus-35-tb-vaccine-candidate-in-adults-with-active-or-previous-tb-a-randomized-trial
#5
Richard N van Zyl-Smit, Aliasgar Esmail, Mary E Bateman, Rodney Dawson, Jonathan Goldin, Eva van Rikxoort, Macaya Douoguih, Maria Grazia Pau, Jerald C Sadoff, J Bruce McClain, Margaret Ann Snowden, Jacqueline Benko, David A Hokey, Kathryn Tucker Rutkowski, Andrew Graves, Barbara Shepherd, Sadritdin Ishmukhamedov, Benjamin M N Kagina, Brian Abel, Willem A Hanekom, Thomas J Scriba, Eric D Bateman
RATIONALE: Administration of tuberculosis vaccines in participants with previous or current pulmonary tuberculosis may have the potential for causing harmful post-vaccination immunological (Koch-type) reactions. OBJECTIVES: To assess the safety and immunogenicity of three dose levels of the AERAS-402 live, replication-deficient adenovirus 35-vectored tuberculosis candidate vaccine, containing three mycobacterial antigens, in individuals with current or previous pulmonary tuberculosis...
January 6, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28053362/cost-effectiveness-of-screening-for-active-cases-of-tuberculosis-in-flanders-belgium
#6
G Suzanne A Smit, Ludwig Apers, Wouter Arrazola de Onate, Philippe Beutels, Pierre Dorny, An-Marie Forier, Kristien Janssens, Jean Macq, Ruud Mak, Sandrina Schol, Dirk Wildemeersch, Niko Speybroeck, Brecht Devleesschauwer
OBJECTIVE: To assess the cost-effectiveness of the tuberculosis screening activities currently funded by the Flemish government in Flanders, Belgium. METHODS: After estimating the expenses for 2013-2014 of each of nine screening components - which include high-risk groups, contacts and people who are seeking tuberculosis consultation at a centre for respiratory health care - and the associated costs per active case of tuberculosis identified between 2007 and 2014, we compared the cost-effectiveness of each component...
January 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28050691/yield-of-chest-x-ray-tuberculosis-screening-of-immigrants-during-the-european-refugee-crisis-of-2015-a-single-centre-experience
#7
Julius Matthias Weinrich, Roland Diel, Markus Sauer, Frank Oliver Henes, Karen Meywald-Walter, Gerhard Adam, Gerhard Schön, Peter Bannas
OBJECTIVE: Our aim was to determine the prevalence of tuberculosis (TB), the number needed to screen (NNS), and the diagnostic accuracy of chest X-ray (CXR) screening to detect active pulmonary TB during the 2015 European refugee crisis. MATERIALS AND METHODS: We evaluated data of all refugees who underwent CXR screening in a single-centre of one German metropolitan area in 2015. We determined the prevalence of TB, NNS, and accuracy of CXR to detect active pulmonary TB...
January 3, 2017: European Radiology
https://www.readbyqxmd.com/read/28043641/association-of-slow-recovery-of-mycobacterium-africanum-infected-patients-posttreatment-with-high-content-of-persister-like-bacilli-in-pretreatment-sputum
#8
Leopold D Tientcheu, Andrew Bell, Oumie Secka, Abigail Ayorinde, Jacob Otu, Nathalie J Garton, Jayne S Sutherland, Martin O Ota, Martin Antonio, H M Dockrell, Beate Kampmann, Michael R Barer
OBJECTIVES/BACKGROUND: Mycobacterium africanum that causes 40% of tuberculosis (TB) in West Africa grows more slowly in culture and has similar transmission capacity compared with Mycobacterium tuberculosis, but M. africanum-exposed contacts progress more slowly to active disease. The presence of lipid body (LB) containing M. tuberculosis complex (MTBC) cells in sputum samples has been associated with mycobacterial transcriptomes indicating slow or no growth and persister-like antibiotic tolerance...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043589/tuberculosis-in-slaughtered-cattle-and-workers-in-some-abattoirs-of-baghdad-governorate
#9
A N Al-Thwani, M S Al-Mashhadani
OBJECTIVE/BACKGROUND: Tuberculosis (the white plague) is regarded as one of the most widespread infectious diseases and continues to be a leading cause of death and the most prominent public health problem worldwide. It is caused by Mycobacterium tuberculosis complex, which refers to a group of seven species; one of them known as Mycobacterium bovis-the cause of bovine-type tuberculosis-has an exceptionally wide host range. It infects cattle, humans, goats, cats, dogs, buffalo, and deer...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043583/radiographic-manifestations-of-tuberculosis-in-hiv-positive-patients-correlation-with-cd4-t-cell-count
#10
Mehrdad Bakhshayesh-Karam, Payam Tabarsi, Seyed Mehdi Mirsaiedi, Majid Valiollahpour Amiri, Soheila Zahirifard, Seyed Davood Mansoori, Mohammad Reza Masjedi, Ali Akbar Velayati
BACKGROUND: Observations on Tuberculosis/HIV co-infection in addition to epidemiologic molecular studies have recently provided strong evidence for the state of immune system as the major determinant of the TB imaging spectrum. However, the presence of any correlation between radiographic findings and the degree of immunosuppression in HIV+ patients still remains controversial. The present study aimed to investigate the TB radiographic manifestation in HIV+ patients and its relationship to the CD4 cell count...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043581/common-features-of-tuberculosis-and-sarcoidosis
#11
Esmaeil Mortaz, Mohammad Reza Masjedi, Atefeh Abedini, Soheila Matroodi, Arda Kiani, Dina Soroush, Ian M Adcock
Tuberculosis (TB) is a disease caused by Mycobacterium tuberculosis. Despite the availability of novel therapeutic approaches, TB is considered as one of the leading causes of death due to infectious diseases worldwide. Alveolar macrophages are the first line of defense against M. tuberculosis; they ingest and sequester the bacilli within granulomatous structures. Control and resolution of the infection requires activated T lymphocytes as well as Th1 cytokines. There are two forms of TB: active TB and latent TB...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28043540/nationwide-hiv-mdr-tb-survey-in-japan-and-collaborative-study-in-the-philippines
#12
Toshio Hattori, Nobuyuki Kobayashi, Hideaki Nagai, Haorile Chagan-Yasutan, Elizabeth Telan, Marietta B Solante
BACKGROUND: Although the prevalence of pulmonary tuberculosis (TB) and HIV infection in Japan is low, careful monitoring of these two diseases is necessary. We conducted a nationwide survey on multidrug resistant (MDR)-TB (2011-2013) and HIV-TB (2007-2014) to understand the mode of prevention and the effect of therapy. A study on MDR-TB and HIV in San Lazaro Hospital (SLH) in the Philippines was also conducted. These studies introduced an international collaborative study against the global epidemics of HIV-TB/MDR-TB...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28039548/epr-interpretation-magnetism-and-biological-study-of-a-cu-ii-dinuclear-complex-assisted-by-a-schiff-base-precursor
#13
Kuheli Das, Chiranjit Patra, Chandana Sen, Amitabha Datta, Chiara Massera, Eugenio Garribba, Mohamed Salah El Fallah, Belete B Beyene, Chen-Hsiung Hung, Chittaranjan Sinha, Tulin Askun, Pinar Celikboyun, Daniel Escudero, Antonio Frontera
A new Cu(II) dinuclear complex, Cu2L2 (1) was afforded employing the potentially pentatentate Schiff base precursor H2L, a refluxed product of o-vanillin and diethylenetriamine in methanol. Complex 1 was systematically characterized by FTIR, UV-Vis, emission and EPR spectrometry. The single crystal X-ray diffraction analysis of 1 reveals that the copper atom exhibits a distorted square planar geometry, comprising two pairs of phenolato-O and imine-N donors from two different H2L ligands. The temperature dependent magnetic interpretation agrees with the existence of weak antiferromagnetic interactions between the bridging dinuclear Cu(II) ions...
December 30, 2016: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28032710/anterior-and-posterior-instrumentation-with-different-debridement-and-grafting-procedures-for-multi-level-contiguous-thoracic-spinal-tuberculosis
#14
Xu Cui, Li-Tao Li, Yuan-Zheng Ma
OBJECTIVE: To evaluate the clinical outcomes of anterior and posterior instrumentation with different debridement and graft fusion methods for multi-level contiguous thoracic spinal tuberculosis. METHODS: We retrospectively evaluated 81 patients with multi-level contiguous thoracic spinal tuberculosis who underwent anterior or posterior instrumentation combined with different methods of debridement, decompression, and graft fusion from January 2002 to December 2012...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28029667/outcomes-bronchoscopic-evaluation-in-a-university-hospital
#15
R H Ghimire, N Bhatta, P Koirala, B Bista, D R Misra, B Shah
INTRODUCTION: Study of clinical profile of the patients and diagnostic yield of the selected bronchoscopic procedures gives us important information in clinical decision making and better patient care. There are hardly very few studies regarding these entities. Therefore, we decided to study clinical characteristics and outcomes of the patients who underwent bronchoscopic evaluation in our setting. METHODS: This was a cross-sectional study the consecutive patients who underwent bronchoscopy from 1st May 2013- 30th April 2015 in division of pulmonary, critical care and sleep medicine...
October 2016: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/28029320/pulmonary-infiltrates-in-a-patient-with-advanced-melanoma
#16
Charles A Powell
The Oncology Grand Rounds series is designed to place original reports published in the Journal into clinical context. A case presentation is followed by a description of diagnostic and management challenges, a review of the relevant literature, and a summary of the authors' suggested management approaches. The goal of this series is to help readers better understand how to apply the results of key studies, including those published in Journal of Clinical Oncology, to patients seen in their own clinical practice...
December 28, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28025511/immunological-roles-of-elevated-plasma-levels-of-matricellular-proteins-in-japanese-patients-with-pulmonary-tuberculosis
#17
Beata Shiratori, Jingge Zhao, Masao Okumura, Haorile Chagan-Yasutan, Hideki Yanai, Kazue Mizuno, Takashi Yoshiyama, Tadashi Idei, Yugo Ashino, Chie Nakajima, Yasuhiko Suzuki, Toshio Hattori
Elevated matricellular proteins (MCPs), including osteopontin (OPN) and galectin-9 (Gal-9), were observed in the plasma of patients with Manila-type tuberculosis (TB) previously. Here, we quantified plasma OPN, Gal-9, and soluble CD44 (sCD44) by enzyme-linked immunosorbent assay (ELISA), and another 29 cytokines by Luminex assay in 36 patients with pulmonary TB, six subjects with latent tuberculosis (LTBI), and 19 healthy controls (HCs) from Japan for a better understanding of the roles of MCPs in TB. All TB subjects showed positive results of enzyme-linked immunospot assays (ELISPOTs)...
December 22, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28018449/congenital-miliary-tuberculosis-in-an-18-day-old-boy
#18
Jue Seong Lee, Chang Hoon Lim, Eunji Kim, Hyunwook Lim, Yoon Lee, Ji Tae Choung, Young Yoo
Congenital tuberculosis (TB) is a rare disease that is associated with high mortality. Mycobacterium tuberculosis, the causative agent, may be transmitted from the infected mother to the fetus by the transplacental route or by aspiration of infected amniotic fluid. Clinical symptoms and signs are not specific. Miliary patterns are the most common findings in the chest X-rays of many infants with congenital TB. In this case, an 18-day-old boy had jaundice on the fifth day of birth, and fever and respiratory distress appeared on the 18th day...
November 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28012393/modulatory-effect-of-standardised-amentoflavone-isolated-from-juniperus-communis-l-agianst-freund-s-adjuvant-induced-arthritis-in-rats-histopathological-and-x-ray-anaysis
#19
Souravh Bais, Naveena Abrol, Yash Prashar, Renu Kumari
ETHOPHARMACOLOGIC RELEVANCE: Juniperus communis. L. is a shrub or small evergreen tree, native to Europe, South Asia, and North America, and belongs to family Cupressaceae. It has been used traditionally in unani system and in Swedish medicine as a decoction in inflammatory diseases. The main chemical constituents, which were reported in J. communis L. was α-pinene,, apigenin, sabinene, β-sitosterol, campesterol, limonene, Amentoflavone (AF), cupressuflavone, and many others. AIM: The aim of present study was to isolate the amentoflavone from the plant juniperus communis L...
December 21, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28009073/structural-basis-for-rifamycin-resistance-of-bacterial-rna-polymerase-by-the-three-most-clinically-important-rpob-mutations-found-in-mycobacterium-tuberculosis
#20
Vadim Molodtsov, Nathan T Scharf, Maxwell A Stefan, George A Garcia, Katsuhiko S Murakami
Since 1967, Rifamaycin (RIF) has been used as a first line antibiotic treatment for tuberculosis (TB), and it remains the cornerstone of current short-term TB treatment. Increased occurrence of RIF-resistant (RIF(R) ) TB, ∼41% of which results from the RpoB S531L mutation in RNA polymerase (RNAP), has become a growing problem worldwide. In this study, we determined the X-ray crystal structures of the Escherichia coli RNAPs containing the most clinically important S531L mutation and two other frequently observed RIF(R) mutants, RpoB D516V and RpoB H526Y...
December 23, 2016: Molecular Microbiology
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