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https://www.readbyqxmd.com/read/29220797/primaquine-hybrids-as-promising-antimycobacterial-and-antimalarial-agents
#1
Kristina Pavić, Ivana Perković, Šárka Pospíšilová, Marta Machado, Diana Fontinha, Miguel Prudêncio, Josef Jampilek, Aidan Coffey, Lorraine Endersen, Hrvoje Rimac, Branka Zorc
Four series of primaquine (PQ) derivatives were screened for antitubercular and antiplasmodial activity: amides 1a-k, ureas 2a-s, semicarbazides 3a-c and bis-ureas 4a-u. Antimycobacterial activity of PQ derivatives against Mycobacterium tuberculosis (MTB), M. avium complex (MAC) and M. avium subsp. paratuberculosis (MAP) were evaluated in vitro and compared with PQ and the standard antitubercular drugs. In general, the PQ derivatives showed higher potency than the parent compound. Most of the compounds of series 1 and 2 showed high activity against MAP, comparable or even higher than the relevant drug ciprofloxacin, and weak or no activity against MTB and MAC...
December 2, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29218640/oxoiron-iv-complexes-as-synthons-for-the-assembly-of-heterobimetallic-centers-such-as-the-fe-mn-active-site-of-class-ic-ribonucleotide-reductases
#2
Ang Zhou, Patrick M Crossland, Apparao Draksharapu, Andrew J Jasniewski, Scott T Kleespies, Lawrence Que
Nonheme oxoiron(IV) complexes can serve as synthons for generating heterobimetallic oxo-bridged dimetal complexes by reaction with divalent metal complexes. The formation of FeIII-O-CrIII and FeIII-O-MnIII complexes is described herein. The latter complexes may serve as models for the FeIII-X-MnIII active sites of an emerging class of Fe/Mn enzymes represented by the Class 1c ribonucleotide reductase from Chlamydia trachomatis and the R2-like ligand-binding oxidase (R2lox) found in Mycobacterium tuberculosis...
December 7, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/29218501/evaluating-safety-reporting-in-paediatric-antibiotic-trials-2000-2016-a-systematic-review-and-meta-analysis
#3
REVIEW
Paola Pansa, Yingfen Hsia, Julia Bielicki, Irja Lutsar, A Sarah Walker, Mike Sharland, Laura Folgori
BACKGROUND: There are very few options to treat multidrug-resistant bacterial infections in children. A major barrier is the duration and complexity of regulatory trials of new antibiotics. Extrapolation of safety data from adult trials could facilitate drug development for children. OBJECTIVE: We performed a systematic review on the safety of antibiotic clinical trials (CTs) in children (0-18 years) to evaluate the overall quality of safety trials conducted in children and to determine if age-specific adverse events (AEs) could be identified for specific antibiotic classes...
December 7, 2017: Drugs
https://www.readbyqxmd.com/read/29218392/unusual-circumstances-to-diagnose-cervical-pott-s-disease
#4
Mohamed Ali Kedous, Ahmed Msakni, Wael Chebbi, Mourad Zaraa, Mohsen Trabelsi
Tuberculous spondylodiscitis usually affects the dorso-lumbar spine, and its cervical location is a rare condition that can mimic other diseases and consequently cause treatment delays. We report a case of tuberculous spondylodiscitis of the lower cervical spine discovered under unusual circumstances in a patient with severe polytrauma involving a cranio-cerebral trauma, a non-displaced fracture of the two laminæ and the spinous process of the C6 vertebrae as well as fibular and tibial shaft fractures. The patient underwent static tibial nailing, and a collar with occipital and chin supports was applied...
December 7, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29218257/pulmonary-tuberculosis-versus-recurrent-chemotherapy-induced-pneumonitis-a-clinical-dilemma
#5
Gulrayz Ahmed, Muhammad W Saif
Chemotherapy-induced lung toxicity can affect pulmonary parenchyma, pleura, airways, pulmonary vascular system, mediastinum or the neuromuscular system that is responsible for respiration. Chemotherapy-induced pulmonary toxicity is a diagnosis of exclusion. When the patients with malignancies develop pulmonary toxicity such as pneumonitis and distinguishing it from alternative diseases such as infectious, thrombotic, cardiac, malignant or exacerbation of chronic lung conditions can be difficult. Moreover, such patients are often immunosuppressed, physically stressed from the underlying disease and the cancer treatment and hence, more susceptible to usual and unusual or opportunistic infections...
October 4, 2017: Curēus
https://www.readbyqxmd.com/read/29218036/the-macrophage-a-disputed-fortress-in-the-battle-against-mycobacterium-tuberculosis
#6
REVIEW
Christophe J Queval, Roland Brosch, Roxane Simeone
Mycobacterium tuberculosis (Mtb), the etiological agent of human tuberculosis (TB), has plagued humans for thousands of years. TB still remains a major public health problem in our era, causing more than 4,400 deaths worldwide every day and killing more people than HIV. After inhaling Mtb-contaminated aerosols, TB primo-infection starts in the terminal lung airways, where Mtb is taken up by alveolar macrophages. Although macrophages are known as professional killers for pathogens, Mtb has adopted remarkable strategies to circumvent host defenses, building suitable conditions to survive and proliferate...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29217950/agreement-between-direct-fluorescent-microscopy-and-ziehl-neelsen-concentration-techniques-in-detection-of-pulmonary-tuberculosis-in-northwest-ethiopia
#7
Meseret Workineh, Mandie Maru, Ibrahim Seman, Ziyadu Bezu, Markos Negash, Mulugeta Melku, Addisu Gize, Agumas Shibabaw
Background: The sensitivity of smear microscopy for diagnosis of tuberculosis might be improved through treatment of sputum with sodium hypochlorite and application of fluorescent microscopy. This study aimed to determine the agreement between direct Fluorescent Microscopy and Ziehl-Neelsen concentration technique by their ability of detecting acid fast bacilli in resource poor settings. Methods: A cross sectional study was conducted at Gondar University Referral Hospital, Northwest Ethiopia...
September 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29217949/the-effect-of-psychosocial-factors-and-patients-perception-of-tuberculosis-treatment-non-adherence-in-addis-ababa-ethiopia
#8
Habteyes Hailu Tola, Gholamreza Garmaroudi, Davoud Shojaeizadeh, Azar Tol, Mir Saeed Yekaninejad, Luche Tadesse Ejeta, Abebaw Kebede, Desta Kassa
Background: Although there are several studies reported on factors affecting tuberculosis (TB) treatment non-adherence, there is information gap on psychosocial and patients' perceptions aspects. Therefore, this study was aimed to investigate the effect of psychosocial factors and patients' perceptions on TB treatment non-adherence in Ethiopia. Methods: A cross sectional study was conducted in Addis Ababa from May to December, 2014. Thirty one health facilities were randomly selected and 698 TB patients, who had been on treatment, were enrolled consecutively using patient registration number...
September 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29217910/primary-tubercular-abscess-of-the-axilla-a-rare-case
#9
Ameet Kumar, T S Ramakrishnan, Samaresh Sahu
Tuberculosis can be broadly classified as pulmonary and extrapulmonary. Though pulmonary tuberculosis is the most common presentation, extrapulmonary tuberculosis is also an important entity. A tubercular cold abscess secondary to involvement of an adjacent bone or suppuration of lymph nodes is a well-known entity; however, a primary cold abscess is rare. We report a case of a young girl who presented with an axillary swelling which turned out to be a primary tubercular abscess of the axilla. To the best of our knowledge, this is the first reported case of a primary tubercular abscess presenting in the axilla...
December 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/29217885/acute-thyroid-swelling-in-renal-transplant-recipient
#10
D P Engineer, S Prakash, A Yadav, J Kumhar, A Biswas, G Kunal, A Goel
Tuberculosis (TB) of thyroid gland is rare entity even in solid organ transplant recipients who have a high risk of TB. Thyroid TB is easily diagnosed by fine needle aspiration cytology. The majority of cases require only antitubercular drugs for treatment, and surgical intervention is required only in few patients. We here describe a case of thyroid TB presenting as an acute abscess in postrenal transplant recipient with a background of acute rejection treated with steroid and antithymocyte globulin.
November 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/29217612/mycobacterium-tuberculosis-of-the-elbow-joint
#11
Quintin Liao, James George Shepherd, Sulman Hasnie
Mycobacterium tuberculosis(TB) affecting the elbow joint is rarely reported in the developed world. We present the case of an 85-year-old Caucasian female who complained of a chronically discharging and painful wound across her left elbow during her admission for an ischaemic stroke. This was initially deemed to be either a bursitis or local manifestation of amyloid by her general practitioner and dermatologist respectively prior to admission. She was commenced on flucloxacillin by the medical team for presumed cellulitis with minimal response...
December 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29217277/absence-of-hybridization-with-the-wild-type-and-mutant-rpob-probes-in-the-genotype-mtbdrplus-assay-detects-disputed-rifampicin-mutations
#12
Ngu Njei Abanda, Josiane Yvonne Djieugoué, Vedbar S Khadka, Eric Walter Pefura-Yone, Wilfred Fon Mbacham, Guy Vernet, Veronique Mbeng Penlap, Youping Deng, Sara Irene Eyangoh, Diane Wallace Taylor, Rose Gana Fomban Leke
OBJECTIVE: Mycobacterium tuberculosis isolates that fail to hybridize to at least one rpoB wildtype or any mutation probe on the Genotype MTBDRplus strip are assumed Rifampicin-resistant. However, the precise mutation(s) are unknown. We sought to identify the mutations in isolates with such hybridization patterns and determine if the mutations are associated with resistance to Rifampicin. METHODS: In this study, 275 M. tuberculosis isolates were screened with the Genotype MTBDRplus assay to identify isolates with the hybridization pattern...
December 4, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29216875/pulmonary-inflammatory-myofibroblastic-tumor-indistinguishable-from-tuberculosis-a-case-report-in-a-five-year-old-child-with-hemoptysis
#13
Tao Zuo, Jun Fu, Zhengyi Ni, Baojun Chen
BACKGROUND: Pulmonary inflammatory myofibroblastic tumor (PIMT) is a rare disease in China and its incidence is much lower than that of tuberculosis. PIMT accounts for only 0.04-1.2% of all lung tumors. PIMT can occurs in any age and nearly every part of the body. The clinical symptoms and radiological features of PIMT are nonspecific. Diagnosis is only made on the basis of histopathologic or immunohistochemical evaluation of the postoperation resected tissue. The therapeutic approach to PIMT should rely mainly on complete surgical resection...
December 8, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29216851/what-does-igra-testing-add-to-the-diagnosis-of-ocular-tuberculosis-a-bayesian-latent-class-analysis
#14
Rupesh Agrawal, Robert Grant, Bhaskar Gupta, Dinesh Visva Gunasekeran, Julio J Gonzalez-Lopez, Peter K F Addison, Mark Westcott, Carlos E Pavesio
BACKGROUND: To evaluate the contribution made to the diagnostic work-up for patients with suspected ocular tuberculosis (TB) by QuantiFERON-TB Gold In-Tube (QFT) tests using latent class analysis model. METHODS: A single centre retrospective cohort study. A Bayesian latent class model was constructed on the basis of demographics, phenotypes and test results from patients attending a tertiary referral center in the UK. This estimated the probability of ocular TB for each patient in two versions, first with and then without QFT...
December 8, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29216510/evolution-of-virulence-in-the-mycobacterium-tuberculosis-complex
#15
REVIEW
Mickael Orgeur, Roland Brosch
Mycobacterium tuberculosis, the causative agent of human tuberculosis is one of the most widely spread human pathogens. It has succeeded to infect a quarter of the global human population by developing most sophisticated ways to circumvent innate and adaptive immune defences. This highly specialized, major human pathogen has evolved from a pool of ancestral environmental mycobacteria, whose extant representatives are known under the name of Mycobacterium canettii. Recent whole genome analyses in combination with different phenotypic screens have provided key insights into the evolution of M...
December 4, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29216277/immune-mediated-inflammatory-diseases-differently-affect-igras-accuracy-for-latent-tuberculosis-infection-diagnosis-in-clinical-practice
#16
Irene Latorre, Sonia Mínguez, José-Manuel Carrascosa, Juan Naves, Raquel Villar-Hernández, Beatriz Muriel, Cristina Prat, Esther García-García, Irma Casas, Eugeni Domènech, Carlos Ferrándiz, Lourdes Mateo, Jose Domínguez
BACKGROUND: Clinical accuracy of IGRAs remains unclear on patients with immune-mediated inflammatory diseases (IMIDs). Here, we assess the impact of immunosuppressants and IMIDs on QuantiFERON-TB Gold In-Tube (QFN-G-IT) and T-SPOT.TB accuracy. METHODS: Patients with IMIDs who required latent tuberculosis infection (LTBI) screening were enrolled and classified into: (i) 50 patients with inflammatory rheumatic diseases, (ii) 50 patients with psoriasis and (iii) 30 patients with Crohn's disease...
2017: PloS One
https://www.readbyqxmd.com/read/29216273/isoniazid-concentrations-in-hair-and-plasma-area-under-the-curve-exposure-among-children-with-tuberculosis
#17
Vidya Mave, Aarti Kinikar, Anju Kagal, Smita Nimkar, Hari Koli, Sultanat Khwaja, Renu Bharadwaj, Roy Gerona, Anita Wen, Geetha Ramachandran, Hemanth Kumar, Peter Bacchetti, Kelly E Dooley, Nikhil Gupte, Amita Gupta, Monica Gandhi
We measured hair and plasma concentrations of isoniazid among sixteen children with tuberculosis who underwent personal or video-assisted directly observed therapy and thus had 100% adherence. This study therefore defined typical isoniazid exposure parameters after two months of treatment among fully-adherent patients in both hair and plasma (plasma area under the concentration-time curve, AUC, estimated using pharmacokinetic data collected 0, 2, 4, and 6 hours after drug administration). We found that INH levels in hair among highly-adherent individuals did not correlate well with plasma AUC or trough concentrations, suggesting that each measure may provide incremental and complementary information regarding drug exposure in the context of TB treatment...
2017: PloS One
https://www.readbyqxmd.com/read/29216262/direct-detection-of-mycobacterium-tuberculosis-rifampin-resistance-in-bio-safe-stained-sputum-smears
#18
Surabhi Lavania, Divya Anthwal, Manpreet Bhalla, Nagendra Singh, Sagarika Haldar, Jaya Sivaswami Tyagi
Direct smear microscopy of sputum forms the mainstay of TB diagnosis in resource-limited settings. Stained sputum smear slides can serve as a ready-made resource to transport sputum for molecular drug susceptibility testing. However, bio-safety is a major concern during transport of sputum/stained slides and for laboratory workers engaged in processing Mycobacterium tuberculosis infected sputum specimens. In this study, a bio-safe USP (Universal Sample Processing) concentration-based sputum processing method (Bio-safe method) was assessed on 87 M...
2017: PloS One
https://www.readbyqxmd.com/read/29216193/community-prevalence-of-chronic-respiratory-symptoms-in-rural-malawi-implications-for-policy
#19
Hastings T Banda, Rachael Thomson, Kevin Mortimer, George A F Bello, Grace B Mbera, Rasmus Malmborg, Brian Faragher, S Bertel Squire
BACKGROUND: No community prevalence studies have been done on chronic respiratory symptoms of cough, wheezing and shortness of breath in adult rural populations in Malawi. Case detection rates of tuberculosis (TB) and chronic airways disease are low in resource-poor primary health care facilities. OBJECTIVE: To understand the prevalence of chronic respiratory symptoms and recorded diagnoses of TB in rural Malawian adults in order to improve case detection and management of these diseases...
2017: PloS One
https://www.readbyqxmd.com/read/29216039/corrigendum-persisting-positron-emission-tomography-lesion-activity-and-mycobacterium-tuberculosis-mrna-after-tuberculosis-cure
#20
Stephanus T Malherbe, Shubhada Shenai, Katharina Ronacher, Andre G Loxton, Gregory Dolganov, Magdalena Kriel, Tran Van, Ray Y Chen, James Warwick, Laura E Via, Taeksun Song, Myungsun Lee, Gary Schoolnik, Gerard Tromp, David Alland, Clifton E Barry, Jill Winter, Gerhard Walzl
This corrects the article DOI: 10.1038/nm.4177.
December 7, 2017: Nature Medicine
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