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antimicrobial chemotherapy

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https://www.readbyqxmd.com/read/27922236/microorganisms-isolated-from-cultures-and-infection-focus-and-antibiotic-treatments-in-febrile-neutropenic-children-from-%C3%A5-anl%C3%A4-urfa-turkey
#1
Z Canan Özdemir, Ahmet Koç, Ali Ayçiçek
Chemotherapy induced febrile neutropenia predisposes patients to life threatening infections. We aimed to determine the causative microorganisms, infection focus and antibiotic treatment success in febrile neutropenic children with leukemia. A total of 136 febrile neutropenic episodes in 48 leukemic children were reviewed retrospectively from records. Among 136 febrile neutropenic episodes, 68 (50%) episodes were microbiologically documented. Methicillin sensitive coagulase (-) Staphylococcus aureus were the most common isolates from hemoculture (20...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27916800/lead-discovery-strategies-for-identification-of-chlamydia-pneumoniae-inhibitors
#2
REVIEW
Leena Hanski, Pia Vuorela
Throughout its known history, the gram-negative bacterium Chlamydia pneumoniae has remained a challenging target for antibacterial chemotherapy and drug discovery. Owing to its well-known propensity for persistence and recent reports on antimicrobial resistence within closely related species, new approaches for targeting this ubiquitous human pathogen are urgently needed. In this review, we describe the strategies that have been successfully applied for the identification of nonconventional antichlamydial agents, including target-based and ligand-based virtual screening, ethnopharmacological approach and pharmacophore-based design of antimicrobial peptide-mimicking compounds...
November 28, 2016: Microorganisms
https://www.readbyqxmd.com/read/27895479/cationic-pegylated-liposomes-incorporating-an-antimicrobial-peptide-tilapia-hepcidin-2-3-an-adjuvant-of-epirubicin-to-overcome-multidrug-resistance-in-cervical-cancer-cells
#3
Vivian Juang, Hsin-Pin Lee, Anya Maan-Yuh Lin, Yu-Li Lo
Antimicrobial peptides (AMPs) have been recently evaluated as a new generation of adjuvants in cancer chemotherapy. In this study, we designed PEGylated liposomes encapsulating epirubicin as an antineoplastic agent and tilapia hepcidin 2-3, an AMP, as a multidrug resistance (MDR) transporter suppressor and an apoptosis/autophagy modulator in human cervical cancer HeLa cells. Cotreatment of HeLa cells with PEGylated liposomal formulation of epirubicin and hepcidin 2-3 significantly increased the cytotoxicity of epirubicin...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27888517/differentiation-of-induced-pluripotent-stem-cell-derived-neutrophil-granulocytes-from-common-marmoset-monkey-callithrix-jacchus
#4
Christopher Schrimpf, Christoph Wrede, Silke Glage, Jan Hegermann, Samantha Backhaus, Rainer Blasczyk, Hans-Gert Heuft, Thomas Müller
BACKGROUND: Inherited and acquired marrow failure syndromes most commonly lead to defect in myeloid and/or neutrophil differentiation and/or function. Besides this, neutropenia induced by cancer-adjusted chemotherapy is a frequent clinical problem. In both cases, cell replacement therapy is a well-established, but due to necessity of donors limited and perilous procedure. Therefore, autologous cell replacement from patients' own marrow-derived cells lowers risk and bares new possibilities for therapy...
November 25, 2016: Transfusion
https://www.readbyqxmd.com/read/27880718/contribution-of-jac-to-antimicrobial-stewardship
#5
REVIEW
Alan P Johnson
Antimicrobial stewardship programmes are increasingly being used to improve the quality of antimicrobial prescribing, with the dual aim of optimizing clinical outcomes and minimizing the emergence and spread of antimicrobial resistance. The Journal of Antimicrobial Chemotherapy (JAC) is celebrating its 40th anniversary and, as part of activities to commemorate this event, this article highlights the contribution of JAC to antimicrobial stewardship. Papers published in JAC have contributed to the evidence base for stewardship, have highlighted educational and behavioural change initiatives aimed at improving antibiotic prescribing practice, and have actively sought to foster the practice of antimicrobial stewardship amongst its readers...
November 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27875090/clinical-computed-tomographic-magnetic-resonance-imaging-and-histologic-findings-associated-with-myxomatous-neoplasia-of-the-temporomandibular-joint-in-two-dogs
#6
Arana Parslow, David P Taylor, David J Simpson
CASE DESCRIPTION A 15-year-old neutered female mixed-breed dog (dog 1) and an 11-year-old neutered female Labrador Retriever (dog 2) were examined because of unilateral exophthalmus, third eyelid protrusion, and periorbital swelling that failed to respond to antimicrobial treatment. CLINICAL FINDINGS Both dogs underwent ultrasonographic, CT, and MRI examination of the head. In both dogs, advanced imaging revealed a poorly defined, peripherally contrast-enhancing, mucous-filled cystic mass that radiated from the temporomandibular joint and infiltrated the periorbital tissues and retrobulbar space...
December 1, 2016: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27856702/therapeutic-drug-monitoring-in-the-past-40-years-of-the-journal-of-antimicrobial-chemotherapy
#7
REVIEW
David Reeves, Andrew Lovering, Alison Thomson
Since the Journal of Antimicrobial Chemotherapy was first published in 1975, papers addressing therapeutic drug monitoring (TDM) have been a regular feature. Initially they focused on laboratory aspects of drug concentration measurement then they changed more to the application of TDM in a clinical setting. Over its history, the Journal has provided its readership with the latest technological and scientific advances in TDM and has helped to drive changes in TDM that have directly impacted on patient care. These have varied from improvement in the quality of antimicrobial measurements through better identification of dosage regimens and TDM targets that help predict outcome and adverse events...
December 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27856347/dna-topoisomerase-i-and-dna-gyrase-as-targets-for-tb-therapy
#8
REVIEW
Valakunja Nagaraja, Adwait A Godbole, Sara R Henderson, Anthony Maxwell
Tuberculosis (TB) is the deadliest bacterial disease in the world. New therapeutic agents are urgently needed to replace existing drugs for which resistance is a significant problem. DNA topoisomerases are well-validated targets for antimicrobial and anticancer chemotherapies. Although bacterial topoisomerase I has yet to be exploited as a target for clinical antibiotics, DNA gyrase has been extensively targeted, including the highly clinically successful fluoroquinolones, which have been utilized in TB therapy...
November 14, 2016: Drug Discovery Today
https://www.readbyqxmd.com/read/27836448/multilocus-amplicon-sequencing-of-pseudomonas-aeruginosa-cystic-fibrosis-airways-isolates-collected-prior-to-and-after-early-antipseudomonal-chemotherapy
#9
Sebastian Fischer, Leonie Greipel, Jens Klockgether, Marie Dorda, Lutz Wiehlmann, Nina Cramer, Burkhard Tümmler
BACKGROUND: Early antimicrobial chemotherapy can prevent or at least delay chronic cystic fibrosis (CF) airways infections with Pseudomonas aeruginosa. METHODS: During a 10-year study period P. aeruginosa was detected for the first time in 54 CF patients regularly seen at the CF centre Hannover. Amplicon sequencing of 34 loci of the P. aeruginosa core genome was performed in baseline and post-treatment isolates of the 15 CF patients who had remained P. aeruginosa - positive after the first round of antipseudomonal chemotherapy...
November 8, 2016: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/27822085/danish-childhood-cancer-registry
#10
REVIEW
Henrik Schrøder, Catherine Rechnitzer, Peder Skov Wehner, Steen Rosthøj, Jens Kjølseth Møller, Birgitte Lausen, Gitte Petersen, Mette Nørgaard
AIM OF DATABASE: The overall aim is to monitor the quality of childhood cancer care in Denmark; to register late effects of treatment; to analyze complications of permanent central venous catheters (CVCs); to study blood stream infections in children with cancer; and to study acute toxicity of high-dose methotrexate infusions in children with leukemia. STUDY POPULATION: All children below 15 years of age at diagnosis living in Denmark diagnosed after January 1, 1985 according to the International Classification of Diseases 10, including diagnoses DC00-DD48...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27814643/cellular-efflux-transporters-and-the-potential-role-of-natural-products-in-combating-efflux-mediated-drug-resistance
#11
Muhammad Ayaz, Fazal Subhan, Abdul Sadiq, Farhat Ullah, Jawad Ahmed, Robert D E Sewell
Efflux mediated multidrug resistance (MDR) is a major problem in the treatment of bacterial, fungal and protozoal infections in addition to cancer chemotherapy. Among other well known mechanisms, efflux pumps are significant contributors to chemo-resistance. Efflux mediated resistance generally occurs through up-regulation of genes responsible for the expression of transporter proteins extruding drugs from the cell to create intracellular sub-therapeutic concentrations leading to resistance. The rapid expansion of MDR pathogens necessitates the discovery of resistance modifying drugs, which in combination with antimicrobial or chemotherapeutic agents would tend to reinstate the action of these drugs and avert the emergence of acquired resistance...
January 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/27798204/clofazimine-has-delayed-antimicrobial-activity-against-mycobacterium-tuberculosis-both-in-vitro-and-in-vivo
#12
Nicole C Ammerman, Rosemary V Swanson, Asa Tapley, Chivonne Moodley, Bongani Ngcobo, John Adamson, Afton Dorasamy, Sashen Moodley, Zinhle Mgaga, Linda A Bester, Sanil D Singh, Deepak V Almeida, Jacques H Grosset
OBJECTIVES: The anti-leprosy drug clofazimine has been shown to have antimicrobial activity against Mycobacterium tuberculosis and has been associated with treatment-shortening activity in both clinical and preclinical studies of TB chemotherapy. However, a reported lack of early bactericidal activity (EBA) in TB patients has raised questions regarding the usefulness of clofazimine as an anti-TB drug. Our objective was to systematically evaluate the EBA of clofazimine in vitro and in vivo to provide insight into how and when this drug exerts its antimicrobial activity against M...
October 25, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27790437/ventilator-associated-pneumonia-in-an-infant-caused-by-stenotrophomonas-maltophila-a-case-report
#13
Neelima Angaali, Nina Dutta Roy, Sudharshan Raj Chitgupikar, Preeti Subramanian, Jaya Lakshmi Pabbati
Stenotrophomonas maltophila (S.maltophila) is an aerobic Gram-negative bacillus that is a frequent colonizer of fluids used in the hospital setting. The organism is known to cause life threatening infections in immuno-compromised patients especially in those who are neutropenic, on chemotherapy or on broad spectrum antibiotics. We report a case of ventilator associated pneumonia caused by Stenotrophomonas maltophila in a two-month old infant who later developed multi organ dysfunction syndrome. In seriously ill paediatric patients, S...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27788668/recent-advancements-in-antimycobacterial-and-antifungal-drugs-a-patent-perspective
#14
REVIEW
Zeeshan Fatima, Rahul Pal, Moiz Ashraf Ansari, Saif Hameed
BACKGROUND: Infections caused by Mycobacterium and pathogenic fungi have risen drastically over the past few decades. Moreover, with the increase in the number of immunocompromised (burn, organ transplant, chemotherapy, HIV) patients, these bacterial and fungal infections have led to alarming mortality rates. The drugs currently in use have become relatively ineffective due to ever increasing phenomenon of multidrug resistance. Furthermore, these drugs suffer with severe toxicity effects and also lack cost effectiveness...
2016: Recent Patents on Biotechnology
https://www.readbyqxmd.com/read/27777079/chitosan-nanoparticles-enhances-the-anti-quorum-sensing-activity-of-kaempferol
#15
Sedef Ilk, Necdet Sağlam, Mustafa Özgen, Feza Korkusuz
Quorum sensing (QS) is a cell density dependent expression of species in bacteria mediated by compounds called autoinducers (AI). Several processes responsible for successful establishment of bacterial infection are mediated by QS. Inhibition of QS is therefore being considered as a new target for antimicrobial chemotherapy. Flavonoid compounds are strong antioxidant and antimicrobial agents but their applications are limited due to their poor dissolution and bioavailability. Our objective was to investigate the effect of kaempferol loaded chitosan nanoparticles on modulating QS mediated by AI in model bioassay test systems...
October 21, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27763732/antibiotics-for-ventilator-associated-pneumonia
#16
REVIEW
Lauren E Arthur, Russell S Kizor, Adrian G Selim, Mieke L van Driel, Leonardo Seoane
BACKGROUND: Ventilator-associated pneumonia (VAP) is a significant cause of morbidity and mortality, complicating the medical course of approximately 10% of mechanically-ventilated patients, with an estimated attributable mortality of 13%. To treat VAP empirically, the American Thoracic Society currently recommends antibiotic therapy based on the patients' risk of colonisation by an organism with multidrug resistance. The selection of initial antibiotic therapy in VAP is important, as inappropriate initial antimicrobial treatment is associated with higher mortality and longer hospital stay in intensive care unit (ICU) patients...
October 20, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27756124/toward-photopharmacological-antimicrobial-chemotherapy-using-photoswitchable-amidohydrolase-inhibitors
#17
Claire E Weston, Andreas Krämer, Felix Colin, Özkan Yildiz, Matthias G J Baud, Franz-Josef Meyer-Almes, Matthew J Fuchter
Photopharmacological agents exhibit light-dependent biological activity and may have potential in the development of new antimicrobial agents/modalities. Amidohydrolase enzymes homologous to the well-known human histone deacetylases (HDACs) are present in bacteria, including resistant organisms responsible for a significant number of hospital-acquired infections and deaths. We report photopharmacological inhibitors of these enzymes, using two classes of photoswitches embedded in the inhibitor pharmacophore: azobenzenes and arylazopyrazoles...
October 31, 2016: ACS Infectious Diseases
https://www.readbyqxmd.com/read/27751970/varicella-zoster-virus-infections-in-pediatric-malignancy-patients-a-7-year-analysis
#18
Mine Düzgöl, Gülcihan Özek, Nuri Bayram, Yeşim Oymak, Ahu Kara, Bengü Demirağ, Tuba Hilkay Karapınar, Yılmaz Ay, Canan Vergin, İlker Devrim
Primary Varicella Zoster Virus infection is a benign self-limited disease. In this study, we aimed to review our experience with focusing on the outcome and treatment of the varicella zoster virus (VZV) infection in pediatric malignancy patients. During the study period; a total of 41 patients with pediatric malignancy had been hospitalized with the diagnosis of VZV infection. All the patients were treated with intravenous acyclovir for a median of 7 days (ranging from 5 to 21 days). The calculated attributable delay of chemotherapy due to VZV infections was 8 days (ranging from 2 to 60 days)...
October 18, 2016: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
https://www.readbyqxmd.com/read/27747829/risk-factors-associated-with-the-requirement-for-pharmaceutical-intervention-in-the-hospital-setting-a-systematic-review-of-the-literature
#19
Emma Suggett, John Marriott
BACKGROUND: A number of methods exist for the risk assessment of hospital inpatients to determine the likelihood of patients experiencing drug-related problems (DRPs), including manual review of a patient's medication (medication reviews) and more complex electronic assessment using decision support alerts in electronic prescribing systems. A systematic review was conducted to determine the evidence base for potential risks associated with adult hospital inpatients that could not only lead to medication-related issues but might also be directly associated with pharmacist intervention...
September 2016: Drugs—Real World Outcomes
https://www.readbyqxmd.com/read/27739161/haematoporphyrin-monomethyl-ether-mediated-photodynamic-inactivation-of-the-biofilms-produced-by-standard-and-fluconazole-resistant-candida-albicans-strains
#20
C Liu, M Hu, B Zhang, X Zeng
BACKGROUND: The use of photodynamic antimicrobial chemotherapy (PACT) to treat localized Candida infections is an emerging and promising therapeutic approach. AIM: To assess the photodynamic inactivation (PDI) efficacy of haematoporphyrin monomethyl ether (HMME) on the biofilms produced by standard (ATCC 10231) and fluconazole-resistant Candida albicans strains. METHODS: The PDI efficacy was evaluated by incubating C. albicans biofilms with 0...
October 13, 2016: Clinical and Experimental Dermatology
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