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Skin infection bacteria

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https://www.readbyqxmd.com/read/28742812/broad-range-lytic-bacteriophages-that-kill-staphylococcus-aureus-local-field-strains
#1
Virginia Abatángelo, Natalia Peressutti Bacci, Carina A Boncompain, Ariel A Amadio, Soledad Carrasco, Cristian A Suárez, Héctor R Morbidoni
Staphylococcus aureus is a very successful opportunistic pathogen capable of causing a variety of diseases ranging from mild skin infections to life-threatening sepsis, meningitis and pneumonia. Its ability to display numerous virulence mechanisms matches its skill to display resistance to several antibiotics, including β-lactams, underscoring the fact that new anti-S. aureus drugs are urgently required. In this scenario, the utilization of lytic bacteriophages that kill bacteria in a genus -or even species- specific way, has become an attractive field of study...
2017: PloS One
https://www.readbyqxmd.com/read/28731488/contamination-risk-of-synovial-biopsy-cultures-in-total-hip-arthroplasty-a-prospective-review-of-100-cases
#2
Christophe Pattyn, Thomas De Bo, Joris Anthonissen, Philippe Willekens, Geert Claeys, Emmanuel A Audenaert
INTRODUCTION: Cultures of deep synovial biopsies remain an important tool in diagnosing periprosthetic joint infection, a devastating complication following total hip arthroplasty (THA). Recent reports of unexpected positive intraoperative cultures in aseptic revision arthroplasty, however, challenge the validity and interpretation of these cultures. The aim of this study was to evaluate the contamination risk of synovial biopsy cultures collected intraoperatively during primary THA of healthy subjects...
July 19, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28717038/a-human-biofilm-disrupting-monoclonal-antibody-potentiates-antibiotic-efficacy-in-rodent-models-of-both-staphylococcus-aureus-and-acinetobacter-baumannii-infections
#3
Yan Q Xiong, Angeles Estellés, L Li, W Abdelhady, R Gonzales, Arnold S Bayer, Edgar Tenorio, Anton Leighton, Stefan Ryser, Lawrence M Kauvar
Many serious bacterial infections are antibiotic-refractory due to biofilm formation. A key structural component of biofilm is extracellular DNA which is stabilized by bacterial proteins, including those from the DNABII family. TRL1068 is a high affinity human monoclonal antibody against a DNABII epitope conserved across both gram-positive and gram-negative bacterial species. In the current study, the efficacy of TRL1068 for disruption of biofilm was demonstrated in vitro in the absence of antibiotics by scanning electron microscopy...
July 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28713774/epic-immune-battles-of-history-neutrophils-vs-staphylococcus-aureus
#4
REVIEW
Fermin E Guerra, Timothy R Borgogna, Delisha M Patel, Eli W Sward, Jovanka M Voyich
Neutrophils are the most abundant leukocytes in human blood and the first line of defense after bacteria have breached the epithelial barriers. After migration to a site of infection, neutrophils engage and expose invading microorganisms to antimicrobial peptides and proteins, as well as reactive oxygen species, as part of their bactericidal arsenal. Ideally, neutrophils ingest bacteria to prevent damage to surrounding cells and tissues, kill invading microorganisms with antimicrobial mechanisms, undergo programmed cell death to minimize inflammation, and are cleared away by macrophages...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28711782/the-human-microbiome
#5
REVIEW
Hubert E Blum
Until recently, human microbiology was based on the identification of single microbes, such as bacteria, fungi and viruses, frequently isolated from patients with acute or chronic infections. Novel culture-independent molecular biochemical analyses (genomics, transcriptomics, proteomics, metabolomics) allow today to detect and classify the diverse microorganisms in a given ecosystem (microbiota), such as the gastrointestinal tract, the skin, the airway system, the urogenital tract and others, and to assess all genomes in these ecosystems (microbiome) as well as their gene products...
July 13, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28711712/ex-vivo-and-in-vivo-evaluation-of-microemulsion-based-transdermal-delivery-of-e-coli-specific-t4-bacteriophage-a-rationale-approach-to-treat-bacterial-infection
#6
Vaibhav Rastogi, Pragya Yadav, Anurag Verma, Jayanta K Pandit
This study is focused on the development and evaluation of transdermal delivery of E. coli-specific T4 bacteriophages both ex-vivo and in-vivo using microemulsion as delivery carrier in eradicating the infection caused by E. coli. Microemulsions were prepared by mixing selected oil, surfactants and aqueous phase containing bacteriophages. The formulations were subjected to physicochemical characterization, ex-vivo and in-vivo permeation, stability studies, histological and immunofluorescence examination. The colloidal system exhibits a uniform size distribution, of finite size (150-320nm)...
July 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28705722/identification-characterization-and-expression-analysis-of-tlr5-in-the-mucosal-tissues-of-turbot-scophthalmus-maximus-l-following-bacterial-challenge
#7
Fengqiao Liu, Baofeng Su, Qiang Fu, Mei Shang, Chengbin Gao, Fenghua Tan, Chao Li
TLRs (Toll-like receptors) are very important pathogen pattern recognition receptors, which control the host immune responses against pathogens through recognition of molecular patterns specific to microorganisms. In this regard, investigation of the turbot TLRs could help to understand the immune responses for pathogen recognition. Here, transcripts of two TLR5 (TLR5a and TLR5b) were captured, and their protein structures were also predicted. Meanwhile, we characterized their expression patterns with emphasis on mucosal barriers following different bacterial infection...
July 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28703098/surveillance-perspective-on-lyme-borreliosis-across-the-european-union-and-european-economic-area
#8
Cees C van den Wijngaard, Agnetha Hofhuis, Mariana Simões, Ente Rood, Wilfrid van Pelt, Herve Zeller, Wim Van Bortel
Lyme borreliosis (LB) is the most prevalent tick-borne disease in Europe. Erythema migrans (EM), an early, localised skin rash, is its most common presentation. Dissemination of the bacteria can lead to more severe manifestations including skin, neurological, cardiac, musculoskeletal and ocular manifestations. Comparison of LB incidence rates in the European Union (EU)/European Economic Area (EEA) and Balkan countries are difficult in the absence of standardised surveillance and reporting procedures. We explored six surveillance scenarios for LB surveillance in the EU/EEA, based on the following key indicators: (i) erythema migrans, (ii) neuroborreliosis, (iii) all human LB manifestations, (iv) seroprevalence, (v) tick bites, and (vi) infected ticks and reservoir hosts...
July 6, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28697465/combined-photodynamic-and-antibiotic-therapy-for-skin-disorder-via-lipase-sensitive-liposomes-with-enhanced-antimicrobial-performance
#9
Songhee Jeong, Jonghwan Lee, Byeong Nam Im, Hyung Park, Kun Na
A lipase-sensitive singlet oxygen-producible and erythromycin-loaded liposome (LSSPL) was developed for combination antibacterial therapy for skin disorder. The LSSPL was synthesized by coating pullulan-pheophorbide a (PU-Pheo A) conjugates onto erythromycin-loaded liposomes composed of 1,2-dipalmitoyl-sn-phosphatidylcholine (DPPC) and cholesterol. Lipase activity was chosen as the environmental-stimulus for the controlled release of erythromycin and Pheo A from LSSPL because skin inflammation-inducing Propionibacterium acnes (P...
July 6, 2017: Biomaterials
https://www.readbyqxmd.com/read/28697269/pediatric-cellulitis-a-red-hot-concern
#10
Andrew Shriner, Laurie Wilkie
Cellulitis and other skin and soft tissue infections are a common reason for children to seek care, both in the primary care setting and the emergency department. Cellulitis is a common skin and soft-tissue infection that is usually caused by streptococci bacteria or, less commonly, Staphylococcus aureus. Most children recover quickly from cellulitis, but a small subset will require hospitalization. Practitioners need to be skilled in the diagnosis and treatment of cellulitis, including recognition of the need for inpatient treatment...
July 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28689800/investigation-and-analysis-of-the-characteristics-and-drug-sensitivity-of-bacteria-in-skin-ulcer-infections
#11
Hang Yang, Wen-Sheng Wang, Yang Tan, Dao-Jun Zhang, Jin-Jin Wu, Xia Lei
PURPOSE: Skin ulcer is a common type of disease affecting patients' health and quality of life, and bacterial infection increases the difficulty of its management. METHODS: The present study collected the results of bacterial culture sampled from the surface of 110 cases of skin ulcers at our hospital from January 2011 to December 2012. We analyzed the constituent ratios of ulcer surface bacteria, the change in the main infectious bacteria and the results of drug-sensitivity testing for common bacteria...
May 24, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28684745/mie-scatter-spectra-based-device-for-instant-contact-free-and-specific-diagnosis-of-bacterial-skin-infection
#12
Robin E Sweeney, Elizabeth Budiman, Jeong-Yeol Yoon
Rapid and specific diagnostic techniques are needed to expedite specific treatment of bacterial skin infections with narrow-spectrum antibiotics, rather than broad-spectrum. Through this work a device was developed to determine the presence of and species responsible for a bacterial skin infection using differences in Mie scatter spectra created by different bacterial species. A 650 nm LED at five different incident angles is used to illuminate the tissue, with Mie scatter being detected by PIN photodiodes at eight different detection angles...
July 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28683164/optimization-of-pma-qpcr-for-staphylococcus-aureus-and-determination-of-viable-bacteria-in-indoor-air
#13
Ching-Wen Chang, Meng-Hsuan Lin
Staphylococcus aureus may cause infections in humans from mild skin disorders to lethal pneumonia. Rapid and accurate monitoring of viable S. aureus is essential to characterize human exposure. This study evaluated quantitative PCR (qPCR) with propidium monoazide (PMA) to quantify S. aureus. The results showed comparable S. aureus counts between exclusively live cells and mixtures of live/dead cells by qPCR with 1.5 or 2.3 μg/mL PMA (P>0.05), illustrating the ability of PMA-qPCR to detect DNA exclusively from viable cells...
July 6, 2017: Indoor Air
https://www.readbyqxmd.com/read/28682675/expression-and-influence-of-matrix-metalloproteinase-9-tissue-inhibitor-of-metalloproteinase-1-and-vascular-endothelial-growth-factor-in-diabetic-foot-ulcers
#14
Gongchi Li, Xinhua Zou, Youpeng Zhu, Jing Zhang, Lijun Zhou, Dan Wang, Binghui Li, Zhenbing Chen
A high matrix metalloproteinase-9/tissue inhibitor of metalloproteinase-1 (MMP9/TIMP1) ratio is associated with poor ulcer healing, yet how the ratio of MMP9/TIMP1 changes in diabetic foot ulcers (DFUs) with infection and how these changes may affect wound healing remain unclear. Therefore, the objective of this investigation was to explore relationships among the MMP9/TIMP1 ratio, infection, and DFUs. After being informed of the details of this study, 32 patients signed consent forms. Skin biopsies were performed for all patients...
March 2017: International Journal of Lower Extremity Wounds
https://www.readbyqxmd.com/read/28676670/species-specific-antifungal-activity-of-blue-light
#15
Wioleta J Trzaska, Helen E Wrigley, Joanne E Thwaite, Robin C May
Fungal pathogens represent a significant threat to immunocompromised patients or individuals with traumatic injury. Strategies to efficiently remove fungal spores from hospital surfaces and, ideally, patient skin thus offer the prospect of dramatically reducing infections in at-risk patients. Photodynamic inactivation of microbial cells using light holds considerable potential as a non-invasive, minimally destructive disinfection strategy. Recent data indicate that high-intensity blue light effectively removes bacteria from surfaces, but its efficacy against fungi has not been fully tested...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28671392/recreational-waterborne-illnesses-recognition-treatment-and-prevention
#16
Allen Perkins, Marirose Trimmier
Illness after recreational water activities can be caused by a variety of agents, including bacteria, viruses, parasites, algae, and even chlorine gas. These illnesses are more common in summer. Waterborne illnesses are underreported because most recreational activity occurs in unsupervised venues or on private property, and participants tend to disperse before illness occurs. Symptoms of waterborne illness are primarily gastrointestinal, but upper respiratory and skin manifestations also occur. Gastrointestinal symptoms are usually self-limited, and supportive treatment may be all that is necessary...
May 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/28664981/temperature-variation-bacterial-diversity-and-fungal-infection-dynamics-in-the-amphibian-skin
#17
Ana V Longo, Kelly R Zamudio
Host-associated bacterial communities on the skin act as the first line of defense against invading pathogens. Yet, for most natural systems, we lack a clear understanding of how temperature variability affects structure and composition of skin bacterial communities, and in turn, promotes or limits the colonization of opportunistic pathogens. Here, we examine how natural temperature fluctuations might be related to changes in skin bacterial diversity over time in three amphibian populations infected by the pathogenic fungus Batrachochytrium dendrobatidis (Bd)...
June 30, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28659908/pterostilbene-a-methoxylated-resveratrol-derivative-efficiently-eradicates-planktonic-biofilm-and-intracellular-mrsa-by-topical-application
#18
Shih-Chun Yang, Chih-Hua Tseng, Pei-Wen Wang, Po-Liang Lu, Yi-Han Weng, Feng-Lin Yen, Jia-You Fang
Pterostilbene is a methoxylated derivative of resveratrol originated from natural sources. We investigated the antibacterial activity of pterostilbene against drug-resistant Staphylococcus aureus and the feasibility of using it to treat cutaneous bacteria. The antimicrobial effect was evaluated using an in vitro culture model and an in vivo mouse model of cutaneous infection. The minimum inhibitory concentration (MIC) assay demonstrated a superior biocidal activity of pterostilbene compared to resveratrol (8~16-fold) against methicillin-resistant S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28655322/interaction-of-primary-mast-cells-with-borrelia-burgdorferi-sensu-stricto-role-in-transmission-and-dissemination-in-c57bl-6-mice
#19
Quentin Bernard, Zhenping Wang, Anna Di Nardo, Nathalie Boulanger
BACKGROUND: Borrelia burgdorferi (sensu lato), the causative agent of Lyme borreliosis is a bacterium transmitted by hard ticks, Ixodes spp. Bacteria are injected into the host skin during the tick blood meal with tick saliva. There, Borrelia and saliva interact together with skin cells such as keratinocytes, fibroblasts, mast cells and other specific immune cells before disseminating to target organs. METHODS: To study the role of mast cells in the transmission of Lyme borreliosis, we isolated mouse primary mast cells from bone marrow and incubated them in the presence of Borrelia burgdorferi (sensu stricto) and tick salivary gland extract...
June 27, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28652437/increased-resistance-of-skin-flora-to-antimicrobial-prophylaxis-in-patients-undergoing-hip-revision-arthroplasty
#20
Heinrich M L Mühlhofer, Lukas Deiss, Philipp Mayer-Kuckuk, Florian Pohlig, Norbert Harrasser, Ulrich Lenze, Hans Gollwitzer, Christian Suren, Peter Prodinger, Rüdiger VON Eisenhart-Rothe, Johannes Schauwecker
BACKGROUND/AIM: Prosthetic joint infection (PJI) remains a major complication after total joint replacement and is the primary indication for revision arthroplasty. Specifically, coagulase-negative Staphylococci (CNS) can cause low-grade infections. Despite the use of cephalosporin-based antimicrobial prophylaxis (AMP) and antiseptic treatment at the surgical site, evidence suggests that a significant number of cases of dermal CNS results in low-grade PJI. Thus, this study examined the bacterial colonization and resistance patterns at the surgical site...
July 2017: In Vivo
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