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https://www.readbyqxmd.com/read/29667836/molecular-dynamics-simulations-are-redefining-our-view-of-peptides-interacting-with-biological-membranes
#1
Jakob P Ulmschneider, Martin B Ulmschneider
Ever since the first molecular mechanics computer simulations of biological molecules became possible, there has been the dream to study all complex biological phenomena in silico, simply bypassing the enormous experimental challenges and their associated costs. For this, two inherent requirements need to be met: First, the time scales achievable in simulations must reach up to the millisecond range and even longer. Second, the computational model must accurately reproduce what is measured experimentally. Despite some recent successes, the general consensus in the field to date has been that neither of these conditions have yet been met and that the dream will be realized, if at all, only in the distant future...
April 18, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29667535/clinical-features-and-short-term-outcome-of-presumptive-intracranial-complications-associated-with-otitis-media-interna-a-multi-center-retrospective-study-of-19-cats-2009-2017
#2
Sarah A Moore, R Timothy Bentley, Sheila Carrera-Justiz, Kari D Foss, Ronaldo C da Costa, Laurie B Cook
Objectives The aim of this study was to compile an overview of the clinical features of intracranial complication of otitis media/interna (OMI) in cats managed across five veterinary referral hospitals. Of additional interest were culture results that could inform empirical antibiotic selection, as well as outcome with both medical and surgical management. Methods A retrospective medical record review was conducted at five veterinary referral practices to identify cats with a diagnosis of intracranial complication secondary to OMI between 2009 and 2017...
April 1, 2018: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/29667487/pre-colonization-with-the-commensal-fungus-candida-albicans-reduces-murine-susceptibility-to-clostridium-difficile-infection
#3
Laura Markey, Lamyaa Shaban, Erin R Green, Katherine P Lemon, Joan Mecsas, Carol A Kumamoto
Clostridium difficile is a major nosocomial pathogen responsible for close to half a million infections and 27,000 deaths annually in the U.S. Preceding antibiotic treatment is a major risk factor for C. difficile infection (CDI) leading to recognition that commensal microbes play a key role in resistance to CDI. Current antibiotic treatment of CDI is only partially successful due to a high rate of relapse. As a result, there is interest in understanding the effects of microbes on CDI susceptibility to support treatment of patients with probiotic microbes or entire microbial communities (e...
April 18, 2018: Gut Microbes
https://www.readbyqxmd.com/read/29667381/galleria-mellonella-l-as-model-organism-used-in-biomedical-and-other-studies
#4
Ewa Mikulak, Aleksandra Gliniewicz, Marta Przygodzka, Jolanta Solecka
Comparative of studies of genomes of invertebrates and humans shows that in invertebrates including insects there are numerous homologues of human’s genes coding proteins involved in recognition pathogens or transduction of the expression signal. Thanks this features, insects such as Drosophila melanogaster M., Blattella germanica L., Culex quinquefasciatus S., Bombyx mori L. and Galleria mellonella L. are used in studies on virulence, host resistance or in assessing the in vivo efficacy of antibiotics, fungicides and other biologically active substances...
2018: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/29667378/alarming-results-of-nosocomial-infections-in-a-multicenter-program-of-surveillance-in-polish-intensive-care-units
#5
Michał Wałaszek, Anna Różańska, Małgorzata Bulanda, Jadwiga Wojkowska-Mach, Polish Society of Hospital Infections Team
INTRODUCTION: Nosocomial bloodstream infections (BSI) among patients in intensive care units (ICU) are the most common form of nosocomial infections and they are serious complications of the treatment process. The etiological factors of these infections and the proper antibiotic therapy can influence the effects of patient treatment. The aim of the study was to analyze the epidemiology, microbiology and antibiotic therapy of nosocomial BSI in Polish ICU patients. MATERIALS AND METHODS: The retrospective study covered patients hospitalized in seven ICUs for adults with a general profile, located in southern Poland...
2018: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/29667186/infectious-diseases-in-older-adults-of-long-term-care-facilities-update-on-approach-to-diagnosis-and-management
#6
REVIEW
Robin L P Jump, Christopher J Crnich, Lona Mody, Suzanne F Bradley, Lindsay E Nicolle, Thomas T Yoshikawa
The diagnosis, treatment, and prevention of infectious diseases in older adults in long-term care facilities (LTCFs), particularly nursing facilities, remains a challenge for all health providers who care for this population. This review provides updated information on the currently most important challenges of infectious diseases in LTCFs. With the increasing prescribing of antibiotics in older adults, particularly in LTCFs, the topic of antibiotic stewardship is presented in this review. Following this discussion, salient points on clinical relevance, clinical presentation, diagnostic approach, therapy, and prevention are discussed for skin and soft tissue infections, infectious diarrhea (Clostridium difficile and norovirus infections), bacterial pneumonia, and urinary tract infection, as well as some of the newer approaches to preventive interventions in the LTCF setting...
April 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29667140/multidisciplinary-management-of-pyogenic-spondylodiscitis-epidemiological-and-clinical-features-prognostic-factors-and-long-term-outcomes-in-207-patients
#7
Enrico Pola, F Taccari, G Autore, F Giovannenze, V Pambianco, R Cauda, G Maccauro, M Fantoni
PURPOSE: Pyogenic spondylodiscitis (PS) is a potentially life-threatening infection burdened by high morbidity rates. Despite the rising incidence, the proper management of PS is still controversial. Aim of this study was to describe the clinical features of PS and to evaluate the prognostic factors and the long-term outcomes of a large population of patients. METHODS: 207 cases of PS treated from 2008 to 2016 with a 2-year follow-up were enrolled. Clinical data from each patient were recorded...
April 17, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29667009/encapsulating-viability-of-multi-strain-lactobacilli-as-potential-probiotic-in-pigs
#8
Sudthidol Piyadeatsoontorn, Rutjawate Taharnklaew, Tewa Upathanpreecha, Pairat Sornplang
Important aspects of the selection of probiotics to be used for mixing in animal feed include host species specificity and probiotic cell survival during production and storage of their products. The research was to screen and investigate some probiotic properties of lactic acid bacteria (LAB) isolated from pig fecal samples. One hundred and thirty-eight representative LAB isolates, which were isolated from 51 pig fecal samples, were tested for acid and bile tolerance, antimicrobial susceptibility, antibacterial activity, potential adhesion to the cell surface, and survival rates when stored in varied microencapsulation forms: freeze-dried, spray-dried, and micro-beads...
April 17, 2018: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29666890/manipulating-the-expression-of-sarp-family-regulator-bulz-and-its-target-gene-product-to-increase-tacrolimus-production
#9
Dongxu Ma, Cheng Wang, Hong Chen, Jianping Wen
Tacrolimus (FK506), an effective immunosuppressant, is widely used in the treatment of autoimmune diseases. In this study, we identified that BulZ, a Streptomyces antibiotic regulatory protein (SARP) family regulator, acted as a positive regulator for spore differentiation and tacrolimus production. A knockout of bulZ resulted in a 47.5% decrease of tacrolimus production and a delay of spore differentiation. Using quantitative real-time PCR (qRT-PCR) analysis and electrophoretic mobility shift assays (EMSAs), it was found that BulZ directly activated the transcriptions of bulZ and bulS2, a putative γ-butyrolactone (GBL) synthetase, and bulS2 was shown to play a positive role in tacrolimus biosynthesis...
April 18, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29666860/fluorescence-imaging-of-antibiotic-clofazimine-encapsulated-within-mesoporous-silica-particle-carriers-relevance-to-drug-delivery-and-the-effect-on-its-release-kinetics
#10
Lorenzo Angiolini, Sabrina Valetti, Boiko Cohen, Adam Feiler, Abderrazzak Douhal
We report on the encapsulation of the antibiotic clofazimine (CLZ) within the pores of mesoporous silica particles having hydrophilic (CBET value of 137) and more hydrophobic (CBET value of 94 after calcination at 600 °C) surfaces. We studied the effect of pH on the released amount of CLZ in aqueous solutions and observed a maximum at pH 4.1 in correlation with the solubility of the drug. Less release of the drug was observed from the more hydrophobic particles which was attributed to a difference in the affinity of the drug to the carrier particles...
April 18, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29666765/characterization-of-antimicrobial-resistance-genes-in-haemophilus-parasuis-isolated-from-pigs-in-china
#11
Yongda Zhao, Lili Guo, Jie Li, Xianhui Huang, Binghu Fang
Background: Haemophilus parasuis is a common porcine respiratory pathogen that causes high rates of morbidity and mortality in farmed swine. We performed a molecular characterization of antimicrobial resistance genes harbored by H. parasuis from pig farms in China. Methods: We screened 143 H. parasuis isolates for antimicrobial susceptibility against six fluoroquinolone antibiotics testing by the broth microdilution method, and the presence of 64 antimicrobial resistance genes by PCR amplification and DNA sequence analysis...
2018: PeerJ
https://www.readbyqxmd.com/read/29666685/identifying-risk-factors-for-healthcare-associated-infections-caused-by-carbapenem-resistant-acinetobacter-baumannii-in-a-neonatal-intensive-care-unit
#12
Amira M Sultan, Wael A Seliem
Objectives: Acinetobacter baumannii is a causative pathogen of various healthcare-associated infections (HAIs) and is particularly prevalent in high-risk hospital settings. This study aimed to determine risk factors associated with HAIs caused by carbapenem-resistant A. baumannii (CRAB) in a neonatal intensive care unit (NICU). Methods: This prospective study was performed between January 2013 and June 2014 among NICU patients at the Mansoura University Children's Hospital, Mansoura, Egypt...
February 2018: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/29666617/perspectives-of-phage-eukaryotic-cell-interactions-to-control-epstein-barr-virus-infections
#13
Andrzej Górski, Ryszard Międzybrodzki, Ewa Jończyk-Matysiak, Beata Weber-Dąbrowska, Natalia Bagińska, Jan Borysowski
Recently, leading medical journals emphasized the importance of further studies on the potential application of bacterial viruses (phages) for the treatment of antibiotics-resistant infections outlining the present status of the therapy and perspectives for the future. Furthermore, a leading scientific journal pointed to the recent progress in research on phage interactions with eukaryotic cells (especially cells of the immune system) and potential implications of their results for our broader understanding of the role of phages - not only as "bacteria eaters" - but also as an important part of our body defense protecting against external and internal pathogenic invaders (as suggested previously)...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29666613/novel-biocontrol-methods-for-listeria-monocytogenes-biofilms-in-food-production-facilities
#14
REVIEW
Jessica A Gray, P Scott Chandry, Mandeep Kaur, Chawalit Kocharunchitt, John P Bowman, Edward M Fox
High mortality and hospitalization rates have seen Listeria monocytogenes as a foodborne pathogen of public health importance for many years and of particular concern for high-risk population groups. Food manufactures face an ongoing challenge in preventing the entry of L. monocytogenes into food production environments (FPEs) due to its ubiquitous nature. In addition to this, the capacity of L. monocytogenes strains to colonize FPEs can lead to repeated identification of L. monocytogenes in FPE surveillance...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29666548/inhibitory-effect-of-soy-saponins-on-the-activity-of-%C3%AE-lactamases-including-new-delhi-metallo-%C3%AE-lactamase-1
#15
Hitoshi Horie, Asuka Chiba, Shigeo Wada
β-Lactamase-producing bacteria encode enzymes that inactivate β-lactam antibiotics by catalyzing the hydrolysis of the β-lactam ring. Crude soy saponins were observed to have synergistic effects on the antimicrobial activity of β-lactam antibiotics against β-lactamase-producing Staphylococcus aureus strains. Furthermore, the activities of β-lactamases derived from Enterobacter cloacae , Escherichia coli , and S. aureus were decreased significantly in the presence of crude soy saponins. This inhibitory effect was also observed against the New Delhi metallo-β-lactamase 1 (NDM-1), an enzyme whose activity is not inhibited by the current β-lactamase inhibitors...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666504/no-prophylactic-antibiotic-use-for-young-children-s-intussusception-with-low-risk-infection-after-successful-air-enema-reduction
#16
Yuan Zhang, Wen Zou, Lemeng Ren, Yinghui Zhang, Zhaohui Sun, Huandi Liu, Qian Liu, Chunfeng Si, Hongying Jia
The Chinese government has issued the policy of promulgating the clinical use of antibacterial drugs since 2011. Prophylactic antibiotic use is a challenging problem among young children with intussusception after successful air enema reduction. There were limited data regarding the clinical value of prophylactic antibiotics for intussusception with low-risk infections. A retrospective non-randomized comparative study was conducted among 188 young children with intussusception after successful air enema reduction between January 1, 2011 and December 30, 2013...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666383/effect-of-antibiotic-use-for-acute-bronchiolitis-on-new-onset-asthma-in-children
#17
I-Lun Chen, Hsin-Chun Huang, Yu-Han Chang, Hsin-Yi Huang, Wei-Ju Yeh, Ting-Yi Wu, Jau-Ling Suen, San-Nan Yang, Chih-Hsing Hung
Early-life use of antibiotics is associated with asthma. We examined the effect of antibiotic use for early-life bronchiolitis on the development of new-onset asthma in children from Taiwan between 2005 and 2010. Data were from the National Health Insurance Research Database 2010, and diseases were coded using the International Classification of Disease (ICD). We classified the patients, all of whom had bronchiolitis, as having asthma or not having asthma. Asthma was diagnosed using ICD criteria and by use of an inhaled bronchodilator and/or corticosteroid twice in one year...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666161/implementation-of-the-sepsis-risk-calculator-at-an-academic-birth-hospital
#18
Miren B Dhudasia, Sagori Mukhopadhyay, Karen M Puopolo
BACKGROUND: Multivariate predictive models for estimating the risk of neonatal early-onset sepsis (EOS) are available as a Web-based sepsis risk calculator (SRC) and may reduce the proportion of newborns empirically treated with antibiotics after birth. EOS risk assessment based on such models would require workflow changes at most birth hospitals. METHODS: A multidisciplinary team of obstetric, neonatal, and information technology staff at a large, academic, birth hospital collaborated to implement the SRC...
April 17, 2018: Hospital Pediatrics
https://www.readbyqxmd.com/read/29666092/a-rare-cause-of-oligoarthritis-with-septic-presentation
#19
Patrick Hoversten, Joel Beachey, Michael Pham, Anjali Bhagra
A 33-year-old man presented with new-onset, asymmetric, migratory oligoarthritis in the setting of several weeks of nausea and vomiting, diarrhoea, fevers and dysuria. He was initially treated in the inpatient setting with broad-spectrum antibiotics due to concern for an evolving sepsis presentation. Arthrocentesis of a large right knee effusion revealed inflammatory synovial fluid without findings suggestive of septic arthritis. Human leucocyte antigen B27 was positive and, taken together with the antecedent history of gastroenteritis, dysuria and inflammatory oligoarthritis, the clinical diagnosis was most consistent with reactive arthritis...
April 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29666025/-ingestion-of-caustic-substances-an-analysis-of-the-safety-and-benefit-of-a-less-aggressive-protocol
#20
Noelia Ripoll Trujillo, Lidia Martínez Sánchez, Anna Habimana Jordana, Victoria Trenchs Sainz de La Maza, Víctor Vila Miravet, Carles Luaces Cubells
INTRODUCTION: The ingestion of a caustic agent is the most common cause of admission after being in contact with a domestic product. A group of patients could be considered low risk and not require aggressive procedures such a corticosteroid administration and endoscopy, especially in the paediatric population. OBJECTIVE: To evaluate the safety and benefit of a less aggressive protocol for patients defined as low risk. MATERIAL AND METHODS: An analytical-observational study conducted on patients who consulted for caustic ingestion between January 2011 and December 2015...
April 14, 2018: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
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