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https://www.readbyqxmd.com/read/28330311/scaling-up-a-virginiamycin-production-by-a-high-yield-streptomyces-virginiae-vkm-ac-2738d-strain-using-adsorbing-resin-addition-and-fed-batch-fermentation-under-controlled-conditions
#1
Vakhtang Dzhavakhiya, Vyacheslav Savushkin, Alexander Ovchinnikov, Vladislav Glagolev, Veronika Savelyeva, Evgeniya Popova, Nikita Novak, Elena Glagoleva
Virginiamycin produced by Streptomyces virginiae as a natural mix of macrocyclic peptidolactones M and S is widely used in the industrial production of ethanol fuel and as an antibiotic feed additive for cattle and poultry. Its main antimicrobial components, M1 and S1 factors, act synergistically if the M1:S1 ratio in the final product is 70-75:25-30. This fact significantly complicates the development of stable high-yield strains suitable for industrial application. In the previous work, authors obtained a mutant S...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330268/antimicrobial-activity-of-pvp-coated-silver-nanoparticles-synthesized-by-lysinibacillus-varians
#2
Divya Bhatia, Ashwani Mittal, Deepak Kumar Malik
Emergence of resistant microbes to conventional antibiotics and increased emphasis on health-care costs has raised the concern for the development of new effective antimicrobial reagents. Silver nanoparticles being an excellent broad-spectrum antibacterial agent could be considered as a suitable alternative for existing antibiotic. This study demonstrates the extra-cellular synthesis of stable silver nanoparticles using supernatant of Lysinibacillus varians. The synthesized silver nanoparticles were characterized by using UV-visible spectrum analysis, X-ray diffraction, Transmission electron microscopy (TEM) and FT-IR analysis...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329125/outcomes-in-patients-with-cardiovascular-implantable-electronic-device-infection-managed-with-chronic-antibiotic-suppression
#3
Eugene M Tan, Daniel C DeSimone, M Rizwan Sohail, Larry M Baddour, Walter R Wilson, James M Steckelberg, Abinash Virk
Background: Most cardiovascular implantable electronic device (CIED) recipients are elderly, have multiple comorbid conditions, and are at increased risk of CIED infection (CIEDI). Current guidelines recommend complete device removal in patients with CIEDI to prevent relapse and mortality. However, comorbidities or other factors may preclude device removal, thus prompting a non-surgical approach that includes chronic antibiotic suppression (CAS). There are limited data on outcomes of patients receiving CAS for CIEDI...
February 24, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28328947/a-spontaneous-mutation-in-kdsd-a-biosynthesis-gene-for-3-deoxy-d-manno-octulosonic-acid-occurred-in-a-ciprofloxacin-resistant-strain-of-francisella-tularensis-and-caused-a-high-level-of-attenuation-in-murine-models-of-tularemia
#4
Taylor Chance, Jennifer Chua, Ronald G Toothman, Jason T Ladner, Jonathan E Nuss, Jo Lynne Raymond, Fabrice V Biot, Samandra Demons, Lynda Miller, Stephanie Halasohoris, Sherry Mou, Galina Koroleva, Sean Lovett, Gustavo Palacios, Nicholas J Vietri, Patricia L Worsham, Christopher K Cote, Todd M Kijek, Joel A Bozue
Francisella tularensis, a gram-negative facultative intracellular bacterial pathogen, is the causative agent of tularemia and able to infect many mammalian species, including humans. Because of its ability to cause a lethal infection, low infectious dose, and aerosolizable nature, F. tularensis subspecies tularensis is considered a potential biowarfare agent. Due to its in vitro efficacy, ciprofloxacin is one of the antibiotics recommended for post-exposure prophylaxis of tularemia. In order to identify therapeutics that will be efficacious against infections caused by drug resistant select-agents and to better understand the threat, we sought to characterize an existing ciprofloxacin resistant (CipR) mutant in the Schu S4 strain of F...
2017: PloS One
https://www.readbyqxmd.com/read/28328824/early-use-of-noninvasive-techniques-for-clearing-respiratory-secretions-during-noninvasive-positive-pressure-ventilation-in-patients-with-acute-exacerbation-of-chronic-obstructive-pulmonary-disease-and-hypercapnic-encephalopathy-a-prospective-cohort-study
#5
Jinrong Wang, Zhaobo Cui, Shuhong Liu, Xiuling Gao, Pan Gao, Yi Shi, Shufen Guo, Peipei Li
Noninvasive positive-pressure ventilation (NPPV) might be superior to conventional mechanical ventilation (CMV) in patients with acute exacerbations of chronic obstructive pulmonary disease (AECOPDs). Inefficient clearance of respiratory secretions provokes NPPV failure in patients with hypercapnic encephalopathy (HE). This study compared CMV and NPPV combined with a noninvasive strategy for clearing secretions in HE and AECOPD patients.The present study is a prospective cohort study of AECOPD and HE patients enrolled between October 2013 and August 2015 in a critical care unit of a major university teaching hospital in China...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28328175/preparation-and-application-of-epitope-magnetic-molecularly-imprinted-polymers-for-enrichment-of-sulfonamide-antibiotics-in-water
#6
Yufeng Hu, Cheng Wang, Xiangdao Li, Lifen Liu
Sulfonamides, which are widely used synthetic antibiotics, are hydrophilic and stable. They can easily migrate into the environment and aquatic animals, and increase the risk of cancer, drug resistance, and allergic symptoms if consumed by humans. Here, we developed an epitope magnetic imprinting approach to enrich multiple sulfonamide antibiotics from a water sample. Epitope magnetic molecularly imprinted polymers (EMMIPs) were prepared by free-radical polymerization using vinyl-functioned Fe3 O4 as a core, sulfanilamide (SA) as a dummy template, methacrylic acid as a functional monomer, and ethylene glycol dimethacrylate as a cross-linker...
March 22, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28327271/novel-anti-staphylococcal-and-anti-biofilm-properties-of-two-anti-malarial-compounds-mmv665953-1-3-chloro-4-fluorophenyl-3-3-4-dichlorophenyl-urea-and-mmv665807-5-chloro-2-hydroxy-n-3-trifluoromethyl-phenyl-benzamide
#7
Marta Zapotoczna, Nabila Boksmati, Sinead Donohue, Baizurina Bahtiar, Ahmad Boland, Hamzah Al Somali, Alysia Cox, Hilary Humphreys, James P O'Gara, Marian Brennan, Eoghan O'Neill
PURPOSE: The treatment of device-related infections is challenging and current anti-microbial compounds have poor anti-biofilm activity. We aimed to identify and characterize novel compounds effective in the eradication of Staphylococcus aureus biofilms. METHODOLOGY: Two novel compounds, MMV665953 {1-(3-chloro-4-fluorophenyl)-3-(3,4-dichlorophenyl)urea} and MMV665807{5-chloro-2-hydroxy-N-[3-(trifluoromethyl)phenyl]benzamide}, effective in killing S. aureus biofilms, were identified by screening of the open access 'malaria box' chemical library...
March 23, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28326413/antibiotic-prophylaxis-for-dental-treatment-after-prosthetic-joint-replacement-exploring-the-orthopaedic-surgeon-s-opinion
#8
Clare M McNally, Renuka Visvanathan, Sharon Liberali, Robert J Adams
BACKGROUND: Antibiotic prophylaxis before dental treatment is routinely recommended by orthopaedic surgeons to prevent prosthetic joint infection (PJI). This recommendation is at odds with current guidelines. METHODS: A postal survey of 9 checkbox or short-answer questions was completed by 633 orthopaedic surgeons. RESULTS: The majority of respondents (n = 186 of 260, 72%) believe that antibiotic prophylaxis is required indefinitely for dental treatment...
September 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28326075/advantages-of-the-silkworm-as-an-animal-model-for-developing-novel-antimicrobial-agents
#9
REVIEW
Suresh Panthee, Atmika Paudel, Hiroshi Hamamoto, Kazuhisa Sekimizu
The demand for novel antibiotics to combat the global spread of multi drug-resistant pathogens continues to grow. Pathogenic bacteria and fungi that cause fatal human infections can also kill silkworms and the infected silkworms can be cured by the same antibiotics used to treat infections in the clinic. As an invertebrate model, silkworm model is characterized by its convenience, low cost, no ethical issues. The presence of conserved immune response and similar pharmacokinetics compared to mammals make silkworm infection model suitable to examine the therapeutic effectiveness of antimicrobial agents...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28326066/beneficial-microorganisms-for-corals-bmc-proposed-mechanisms-for-coral-health-and-resilience
#10
REVIEW
Raquel S Peixoto, Phillipe M Rosado, Deborah Catharine de Assis Leite, Alexandre S Rosado, David G Bourne
The symbiotic association between the coral animal and its endosymbiotic dinoflagellate partner Symbiodinium is central to the success of corals. However, an array of other microorganisms associated with coral (i.e., Bacteria, Archaea, Fungi, and viruses) have a complex and intricate role in maintaining homeostasis between corals and Symbiodinium. Corals are sensitive to shifts in the surrounding environmental conditions. One of the most widely reported responses of coral to stressful environmental conditions is bleaching...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28324783/recent-updates-of-carbapenem-antibiotics
#11
REVIEW
Mohammed I El-Gamal, Imen Brahim, Noorhan Hisham, Rand Aladdin, Haneen Mohammed, Amany Bahaaeldin
Carbapenems are among the most commonly used and the most efficient antibiotics since they are relatively resistant to hydrolysis by most β-lactamases, they target penicillin-binding proteins, and generally have broad-spectrum antibacterial effect. In this review, we described the initial discovery and development of carbapenems, chemical characteristics, in vitro/in vivo activities, resistance studies, and clinical investigations for traditional carbapenem antibiotics in the market; imipenem-cilastatin, meropenem, ertapenem, doripenem, biapenem, panipenem/betamipron in addition to newer carbapenems such as razupenem, tebipenem, tomopenem, and sanfetrinem...
March 16, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28324232/reducing-surgical-site-infections-following-total-hip-and-knee-arthroplasty-an-israeli-experience
#12
R Finkelstein, O Eluk, T Mashiach, D Levin, B Peskin, G Nirenberg, S Karkabi, M Soudri
PURPOSE: To assess the changes observed in surgical site infection (SSI) rates following total joint arthroplasty (TJA) after the introduction of an infection control programme and evaluate the risk factors for the development of these infections. DESIGN: Prospective cohort study. SETTING: Large tertiary medical centre in Israel. METHODS: Data about SSIs and potential prophylaxis-, patient-, and procedure-related risk factors were collected for all patients who underwent elective total hip and total knee arthroplasty during the study period...
March 21, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28323797/local-antibiotic-therapy-to-reduce-infection-after-operative-treatment-of-fractures-at-high-risk-of-infection-a-multicenter-randomized-controlled-trial-vanco-study
#13
Robert V OʼToole, Manjari Joshi, Anthony R Carlini, Clinton K Murray, Lauren E Allen, Daniel O Scharfstein, Joshua L Gary, Michael J Bosse, Renan C Castillo
A number of clinical studies in the spine literature suggest that the use of local vancomycin powder may substantially reduce surgical site infections (SSIs). These studies are primarily retrospective and observational and few focus on orthopaedic trauma patients. This study is a phase III, prospective, randomized, clinical trial to assess the efficacy of locally administered vancomycin powder in the prevention of SSI after fracture surgery. The primary goal of the VANCO Study is to compare the proportion of deep SSI 6 months after fracture fixation surgery...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28323795/assessment-of-severe-extremity-wound-bioburden-at-the-time-of-definitive-wound-closure-or-coverage-correlation-with-subsequent-postclosure-deep-wound-infection-bioburden-study
#14
Michael J Bosse, Clinton K Murray, Anthony R Carlini, Reza Firoozabadi, Theodore Manson, Daniel O Scharfstein, Joseph C Wenke, Mary Zadnik, Renan C Castillo
Infection remains the most common and significant complication after high-energy fractures. The Bioburden Study is a multicenter, prospective, observational cohort study of wound bacterial bioburden and antibiotic care in severe open lower extremity fractures. The aims of this study are to (1) characterize the contemporary extremity wound "bioburden" at the time of definitive wound closure; (2) determine the concordance between polymerase chain reaction results and hospital microbiology; (3) determine, among those who develop deep infections, the concordance between the pathogens at wound closure and at deep infection; and (4) compare the probability of deep infection between those who did and did not receive an appropriate course of antibiotics based on bioburden at the time of wound closure...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28322460/dapsone-induced-agranulocytosis-possible-involvement-of-low-activity-n-acetyltransferase-2
#15
Ines Potočnjak, Robert Likić, Iveta Šimić, Danica Juričić Nahal, Ivana Čegec, Lana Ganoci, Nada Božina
Dapsone-induced agranulocytosis is a rare but potentially fatal adverse drug reaction (ADR). A 45-year old male Caucasian patient developed agranulocytosis caused by dapsone (diamino-diphenyl sulfone) which he was prescribed for leukocytoclastic vasculitis. Patient's treatment consisted of termination of dapsone, antibiotic therapy, and granulocyte colony stimulating factor leading to prompt improvement of symptoms and normalization of laboratory blood values. Diagnostic evaluation revealed methemoglobinemia and excluded glucose-6-phosphate dehydrogenase (G6PD) deficiency...
March 21, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28321988/a-quality-improvement-initiative-to-optimize-dosing-of-surgical-antimicrobial-prophylaxis
#16
Thomas J Caruso, Ellen Wang, Hayden T Schwenk, David Scheinker, Calida Yeverino, Mary Tweedy, Manjit Maheru, Paul J Sharek
BACKGROUND: The risk of surgical site infections is reduced with appropriate timing and dosing of preoperative antimicrobials. Based on evolving national guidelines, we increased the preoperative dose of cefazolin from 25 to 30 mg·kg(-1) . This quality improvement project describes an improvement initiative to develop standard work processes to ensure appropriate dosing. AIMS: The primary aim was to deliver cefazolin 30 mg·kg(-1) to at least 90% of indicated patients...
March 21, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28321299/successful-emergency-department-interventions-that-reduce-time-to-antibiotics-in-febrile-pediatric-cancer-patients
#17
Sandra Spencer, MIchele Nypaver, Katherine Hebert, Christopher Benner, Rachel Stanley, Daniel Cohen, Alexander Rogers, Jason Goldstick, Prashant Mahajan
Children with cancer and fever are at high risk for sepsis related death. Rapid antibiotic delivery (< 60 minutes) has been shown to reduce mortality. We compared patient outcomes and describe interventions from three separate quality improvement (QI) projects conducted in three United States (US) tertiary care pediatric emergency departments (EDs) with the shared aim to reduce time to antibiotic (TTA) to < 60 minutes in febrile pediatric oncology patients (Temperature > 38.0 C). A secondary objective was to identify interventions amenable to translation to other centers...
2017: BMJ Quality Improvement Reports
https://www.readbyqxmd.com/read/28321267/is-endocarditis-prophylaxis-for-dental-procedures-necessary
#18
COMMENT
Kathryn A Taubert, Walter Wilson
OBJECTIVES: Our purpose is to address whether antimicrobial prophylaxis is necessary before certain dental procedures for patients at increased risk for acquiring infective endocarditis (IE). METHODS: We reviewed recommendations for IE prophylaxis made by the American Heart Association (AHA) from 1995 to the present time. We also compared and contrasted the current recommendations from the AHA, European Society of Cardiology (ESC), United Kingdom's National Institute for Health and Care Excellence (NICE) and a consortium of French organisations...
2017: Heart Asia
https://www.readbyqxmd.com/read/28321214/exogenous-l-valine-promotes-phagocytosis-to-kill-multidrug-resistant-bacterial-pathogens
#19
Xin-Hai Chen, Shi-Rao Liu, Bo Peng, Dan Li, Zhi-Xue Cheng, Jia-Xin Zhu, Song Zhang, Yu-Ming Peng, Hui Li, Tian-Tuo Zhang, Xuan-Xian Peng
The emergence of multidrug-resistant bacteria presents a severe threat to public health and causes extensive losses in livestock husbandry and aquaculture. Effective strategies to control such infections are in high demand. Enhancing host immunity is an ideal strategy with fewer side effects than antibiotics. To explore metabolite candidates, we applied a metabolomics approach to investigate the metabolic profiles of mice after Klebsiella pneumoniae infection. Compared with the mice that died from K. pneumoniae infection, mice that survived the infection displayed elevated levels of l-valine...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28321211/first-foods-and-gut-microbes
#20
Martin F Laursen, Martin I Bahl, Kim F Michaelsen, Tine R Licht
The establishment of the human gut microbiota in early life has been associated with later health and disease. During the 1st months after birth, the microbial composition in the gut is known to be affected by the mode of delivery, use of antibiotics, geographical location and type of feeding (breast/formula). Consequently, the neonatal period and early infancy has attracted much attention. However, after this first period the gut microbial composition continues to develop until the age of 3 years, and these 1st years have been designated "a window of opportunity" for microbial modulation...
2017: Frontiers in Microbiology
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