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s.aureus,microbiology

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https://www.readbyqxmd.com/read/29345970/the-prevalence-and-significance-of-staphylococcus-aureus-in-patients-with-non-cystic-fibrosis-bronchiectasis
#1
Mark L Metersky, Timothy R Aksamit, Alan Barker, Radmila Choate, Charles L Daley, Leigh A Daniels, Angela DiMango, Edward Eden, David Griffith, Margaret Johnson, Michael Knowles, Anne E O'Donnell, Kenneth Olivier, Matthias Salathe, Byron Thomashow, Gregory Tino, Gerard Turino, Kevin L Winthrop, David Mannino
RATIONALE: Staphylococcus aureus is commonly cultured from the sputum of patients with bronchiectasis, however little is known about the prevalence of the organism in these patients, the characteristics of patients who have grown the organism or its implications. OBJECTIVES: Determine the relationship between S. aureus and pulmonary function, frequency of exacerbations and frequency of hospitalization in patients with bronchiectasis Methods: The Bronchiectasis Research Registry is a database of adults with non-cystic fibrosis bronchiectasis identified from 13 sites within the United States...
January 18, 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29340642/identifying-corneal-infections-in-formalin-fixed-specimens-using-next-generation-sequencing
#2
Zhigang Li, Florian P Breitwieser, Jennifer Lu, Albert S Jun, Laura Asnaghi, Steven L Salzberg, Charles G Eberhart
Purpose: We test the ability of next-generation sequencing, combined with computational analysis, to identify a range of organisms causing infectious keratitis. Methods: This retrospective study evaluated 16 cases of infectious keratitis and four control corneas in formalin-fixed tissues from the pathology laboratory. Infectious cases also were analyzed in the microbiology laboratory using culture, polymerase chain reaction, and direct staining. Classified sequence reads were analyzed with two different metagenomics classification engines, Kraken and Centrifuge, and visualized using the Pavian software tool...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29338030/incidence-microbiology-and-outcomes-of-endophthalmitis-after-111-876-pars-plana-vitrectomies-at-a-single-tertiary-eye-care-hospital
#3
Muna Bhende, Rajiv Raman, Mukesh Jain, Pratik K Shah, Tarun Sharma, Lingam Gopal, Pramod S Bhende, Sangeetha Srinivasan, Malathi Jambulingam
PURPOSE: To describe the incidence, risk factors, clinical presentation, causative organisms, and outcomes in patients with endophthalmitis following pars plana vitrectomy (20G and minimally invasive vitrectomy surgery (MIVS). METHODS: Of 111,876 vitrectomies (70,585 20-G 41,291 MIVS) performed, 45 cases developed acute-onset, postoperative endophthalmitis. RESULTS: The rate of culture positive and culture negative endophthalmitis was 0.021% (2...
2018: PloS One
https://www.readbyqxmd.com/read/29333608/the-synergistic-effect-of-pdt-and-oxacillin-on-clinical-isolates-of-staphylococcus-aureus
#4
Natanel Iluz, Yasmin Maor, Natan Keller, Zvi Malik
BACKGROUND: Staphylococcus aureus is a major pathogen in clinical microbiology. It is known to cause infections at various body sites and can be life-threatening. The development of resistance to many well-established antibiotic treatments and the prevalence of methicillin-resistant S. aureus (MRAS) among hospital patients and the general community pose challenges in treating the pathogen. The antimicrobial effect of photodynamic therapy (PDT) has been a subject of study for a long time and can offer new strategies for dealing with resistant strains...
January 15, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29305548/epidemiology-clinical-characteristics-and-antimicrobial-susceptibility-profiles-of-human-clinical-isolates-of-staphylococcus-intermedius-group
#5
Melanie L Yarbrough, William Lainhart, C A Burnham
The veterinary pathogens in Staphylococcus intermedius group (SIG) are increasingly recognized as causes of human infection. Shared features between SIG and Staphylococcus aureus may result in misidentification of SIG in human clinical cultures. This study examined the clinical and microbiological characteristics of isolates recovered at a tertiary care academic medical center. From 2013 to 2015, 81 SIG isolates were recovered from 62 patients. Patients were commonly ≥ 50 years old, diabetic, or immunocompromised...
January 5, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29303754/surface-treatment-of-implant-materials-with-antimicrobial-nanoparticulates
#6
Nathalia Ferraz Oliscovicz, Denise Tornavoi de Castro, Mariana Lima da Costa Valente, Evandro Watanabe, César Penazzo Lepri, Andréa Cândido Dos Reis
This study analyzed nanostructured silver vanadate (AgVO3) films on certain substrate surfaces found in dental implant devices in order to see if these films promote antimicrobial activity. Enamel and glaze vehicles were used to apply the nanomaterial (0.0% [control], 2.5%, 5.0%, and 10.0% concentrations) on 3 substrates (280 specimens per substrate): polytetrafluoroethylene (PTFE), polyacetal, and acrylic resin. An agar diffusion method was performed in triplicate to determine the antimicrobial activity against 8 microorganisms...
January 2018: General Dentistry
https://www.readbyqxmd.com/read/29301116/ag-fe3o4-nanocomposites-penetrate-and-eradicate-s-aureus-biofilm-in-an-in-vitro-chronic-wound-model
#7
Seyedeh Masumeh Ghaseminezhad, Seyed Abbas Shojaosadati, Rikke Louise Meyer
Bacterial biofilms are a common cause of the persistence of chronic wounds, and continue to be an unsolved problem in infection microbiology due to their tolerance to antibiotics. Silver nanoparticles (Ag-NPs) have attracted attention as an alternative to antibiotics for treatment of wound infections, but their use is challenged by limited tissue penetration and high cytotoxicity. The aim of this study was to show that combination of Ag nanoparticles with Fe3O4 to produce Ag/Fe3O4 nanocomposites (NCs) can overcome these problems, as they penetrate and eradicate biofilms when applying a magnetic field...
December 21, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29298323/implementation-of-global-antimicrobial-resistance-surveillance-system-glass-in-patients-with-bacteremia
#8
Rujipas Sirijatuphat, Kantarida Sripanidkulchai, Adhiratha Boonyasiri, Pinyo Rattanaumpawan, Orawan Supapueng, Pattarachai Kiratisin, Visanu Thamlikitkul
The global antimicrobial resistance surveillance system (GLASS) was launched by the World Health Organization (WHO) in 2015. GLASS is a surveillance system for clinical specimens that are sent to microbiology laboratory for clinical purposes. The unique feature of GLASS is that clinical data is combined with microbiological data, and deduplication of the microbiological results is performed. The objective of the study was to determine feasibility and benefit of GLASS for surveillance of blood culture specimens...
2018: PloS One
https://www.readbyqxmd.com/read/29287070/a-diagnostic-and-epidemiologic-investigation-of-acute-febrile-illness-afi-in-kilombero-tanzania
#9
Christine Hercik, Leonard Cosmas, Ondari D Mogeni, Newton Wamola, Wanze Kohi, Victor Omballa, Melvin Ochieng, Shirley Lidechi, Juma Bonventure, Caroline Ochieng, Clayton Onyango, Barry S Fields, Sayoki Mfinanga, Joel M Montgomery
INTRODUCTION: In low-resource settings, empiric case management of febrile illness is routine as a result of limited access to laboratory diagnostics. The use of comprehensive fever syndromic surveillance, with enhanced clinical microbiology, advanced diagnostics and more robust epidemiologic investigation, could enable healthcare providers to offer a differential diagnosis of fever syndrome and more appropriate care and treatment. METHODS: We conducted a year-long exploratory study of fever syndrome among patients ≥ 1 year if age, presenting to clinical settings with an axillary temperature of ≥37...
2017: PloS One
https://www.readbyqxmd.com/read/29283952/is-there-still-a-role-for-vancomycin-in-skin-and-soft-tissue-infections
#10
Alessia Savoldi, Anna M Azzini, David Baur, Evelina Tacconelli
PURPOSE OF REVIEW: Skin and soft-tissue infections (SSIs) are among the commonest infections encountered in clinical practice. Spread of methicillin-resistant Staphylococcus aureus SSIs continues to increase in both health care and community settings and presents a challenge for the best treatment choice. Vancomycin has been the mainstay of SSIs treatment, but recently its use has been questioned because of concerns about its efficacy, tolerability, and unfavorable pharmacokinetic/pharmacodynamic profile...
December 27, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/29261764/pyoderma-outbreak-among-kindergarten-families-association-with-a-panton-valentine-leukocidin-pvl-producing-s-aureus-strain
#11
Rasmus Leistner, Axel Kola, Petra Gastmeier, Renate Krüger, Pia-Alice Hoppe, Sylke Schneider-Burrus, Irina Zuschneid, Nicoletta Wischnewski, Jennifer Bender, Franziska Layer, Michaela Niebank, Carmen Scheibenbogen, Leif G Hanitsch
OBJECTIVES: We report on an outbreak of skin and soft tissue infections (SSTI) among kindergarten families. We analyzed the transmission route and aimed to control the outbreak. METHODS: The transmission route was investigated by nasal screening for Panton-Valentine leukocidin (PVL)-producing Staphylococcus aureus (PVL-SA), subsequent microbiological investigation including whole genome sequencing and a questionnaire-based analysis of epidemiological information...
2017: PloS One
https://www.readbyqxmd.com/read/29261721/the-multistep-road-to-ventilator-associated-lung-abscess-a-retrospective-study-of-s-aureus-ventilator-associated-pneumonia
#12
Roman Mounier, David Lobo, Julia Voulgaropoulos, Mathieu Martin, Bouziane Aït-Mamar, Valérie Bitot, Paul-Henri Jost, Ron Birnbaum, Biba Nebbad, Fabrice Cook, Gilles Dhonneur
OBJECT: We observed some cases of lung abscess (LA) in ICU patients suffering S.aureus ventilator-associated pneumonia (S.aureus-VAP). We aimed to assess which of the host and/or bacteria-related features are associated with LA. METHODS: We conducted a retrospective study from January 2009 to July 2013 in a trauma surgical ICU within a teaching hospital. All adult patients presenting with S.aureus-VAP were included. We compared two groups of patients according to the formation or not of LA concomitantly to S...
2017: PloS One
https://www.readbyqxmd.com/read/29261091/association-of-enterococcus-spp-with-severe-combat-extremity-injury-intensive-care-and-polymicrobial-wound-infection
#13
Rae A Heitkamp, Ping Li, Katrin Mende, Samandra T Demons, David R Tribble, Stuart D Tyner
BACKGROUND: Combat-related extremity wound infections can complicate the recovery of injured military personnel. The Enterococcus genus contains both commensal and pathogenic bacteria found in many combat wounds. We describe the patient population susceptible to Enterococcus infection, the characteristics of Enterococcus spp. isolated from combat-related wounds, and the microbiological profile of Enterococcus-positive wounds. METHODS: Patient and culture data were obtained from the Trauma Infectious Disease Outcomes Study...
December 20, 2017: Surgical Infections
https://www.readbyqxmd.com/read/29258622/nasal-colonization-and-antimicrobial-susceptibility-pattern-of-staphylococcus-aureus-among-pre-school-children-in-ethiopia
#14
Alemayehu Reta, Moges Wubie, Getnet Mekuria
BACKGROUND: Staphylococcus aureus is one of the bacterium that can asymptomatically colonize the human upper respiratory tract (i.e. nose and throat). Carriage of S. aureus, including methicillin resistant S. aureus, is common to children. The aim at this study was to determine the nasal colonization, associated factors and antimicrobial susceptibility patterns of S. aureus isolates among pre-school children in Debre Markos town. METHODS: Institutional-based cross sectional study was conducted...
December 19, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29225755/evaluation-of-anti-bacterial-effects-of-nickel-nanoparticles-on-biofilm-production-by-staphylococcus-epidermidis
#15
Morteza Vahedi, Nima Hosseini-Jazani, Saber Yousefi, Maryam Ghahremani
Background and Objectives: Staphylococcus epidermidis produces biofilm by extracellular polysaccharides, causing bacterial adherence to different surfaces. Anti-microbial effects of nickel nanoparticles on some bacterial strains such as S. aureus and Escherichia coli have been determined in limited studies. The aim of the present study is to examine the inhibitory effect of nickel nanoparticles on biofilm formation using clinical isolates of S. epidermidis and its hemolytic effect on human red blood cells...
June 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29224881/early-lactation-extended-pirlimycin-therapy-against-naturally-acquired-staphylococcus-aureus-intramammary-infections-in-heifers-a-randomized-controlled-trial
#16
S Skoulikas, S Dufour, D Haine, J-Y Perreault, J-P Roy
The primary objective of the current study was to evaluate cure rate following an early-lactation extended intramammary pirlimycin treatment on heifers naturally infected by Staphylococcus aureus. The secondary objective was to assess Petrifilm Staph Express (3M Microbiology, St. Paul, MN) count plate characteristics when used in a protocol for early-lactation detection of infected quarters in heifers. Milk samples were collected from heifers (n = 946) in the first few days following calving (mean = 5 d). Heifers with laboratory-confirmed S...
December 7, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29224313/-incidence-of-blood-stream-infections-of-1265-patients-with-hematopoietic-stem-cell-transplantation-and-analysis-of-pathogenic-bacteria
#17
Q Z Han, Y Chen, H Yang, X F Zhang, J Chen, D P Wu, S N Chen, H Y Qiu
Objective: To analyze the incidence and microbiological features of blood stream infections (BSI) of patients with hematopoietic stem cell transplantation (HSCT) and to provide laboratory data for empirical use of antibiotic for the HSCT patients with BSI. Methods: The incidence of bloodstream infection, the positive rate of blood culture, bacterial spectrum and drug resistance were analyzed in 1 265 HSCT recipients during 2013 and 2015 were retrospectively studied. Results: Of 1265 patients undergoing HSCT, 1 422 cases of suspected BSI occurred in 784 patients (61...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/29213999/genetic-and-phenotypic-study-of-methicillin-resistant-staphylococcus-aureus-among-patients-and-health-care-workers-in-mansoura-university-hospital-egypt
#18
Walaa Othman Elshabrawy, Maysaa Elsayed Zaki, Mohamed Farag Kamel
Background and Objectives: Staphylococcus aureus is common pathogen that is associated with many hospital acquired infections. The virulence of S. aureus is identified with resistance to antibiotics especially to methicillin. Therefore the aims of the present study were to detect the carrier rates of methicillin-resistant S. aureus (MRSA) among health care Workers (HCWs) and patients and to compare use of specific chromogenic agar for MRSA culture with PCR for detection of MRSA genes...
April 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29207958/bloodstream-infections-at-a-tertiary-level-paediatric-hospital-in-south-africa
#19
Harsha Lochan, Vashini Pillay, Colleen Bamford, James Nuttall, Brian Eley
BACKGROUND: Bloodstream infection (BSI) in children causes significant morbidity and mortality. There are few studies describing the epidemiology of BSI in South African children. METHODS: A retrospective descriptive cohort study was conducted at a paediatric referral hospital in Cape Town, South Africa. The National Health Laboratory Service (NHLS) microbiology database was accessed to identify positive blood culture specimens during the period 2011-2012. Demographic and clinical details, antimicrobial management and patient outcome information were extracted from medical and laboratory records...
December 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29204224/bacteriology-and-antibiogram-of-urinary-tract-infection-among-female-patients-in-a-tertiary-health-facility-in-south-eastern-nigeria
#20
REVIEW
Angus N Oli, Vivian B Akabueze, Chijioke E Ezeudu, George U Eleje, Obiora S Ejiofor, Ifeanyichukwu U Ezebialu, Charlotte B Oguejiofor, Ifeoma M Ekejindu, George O Emechebe, Kenneth N Okeke
Background: Urinary Tract Infection (UTI) is a common contagion among men and women with the incidence relatively higher among women due to their differing anatomy. An understanding of the kind of pathogens implicated in urinary tract infections as well as antibiotic susceptibility profiling may help the clinician make rationally correct empirical choice in their treatment. Objective: This study is aimed at determining the type and antibiotic susceptibility pattern of bacterial uropathogens isolated from female patients attending Chukwuemeka Odumegwu Ojukwu University Teaching Hospital (COOUTH), Awka, Nigeria...
2017: Open Microbiology Journal
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