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methicillin sensitive staphylococcus aureus

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https://www.readbyqxmd.com/read/28081265/the-plasmin-sensitive-protein-pls-in-methicillin-resistant-staphylococcus-aureus-mrsa-is-a-glycoprotein
#1
Isabelle Bleiziffer, Julian Eikmeier, Gottfried Pohlentz, Kathryn McAulay, Guoqing Xia, Muzaffar Hussain, Andreas Peschel, Simon Foster, Georg Peters, Christine Heilmann
Most bacterial glycoproteins identified to date are virulence factors of pathogenic bacteria, i.e. adhesins and invasins. However, the impact of protein glycosylation on the major human pathogen Staphylococcus aureus remains incompletely understood. To study protein glycosylation in staphylococci, we analyzed lysostaphin lysates of methicillin-resistant Staphylococcus aureus (MRSA) strains by SDS-PAGE and subsequent periodic acid-Schiff's staining. We detected four (>300, ∼250, ∼165, and ∼120 kDa) and two (>300 and ∼175 kDa) glycosylated surface proteins with strain COL and strain 1061, respectively...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28068970/quadriplegia-caused-by-an-epidural-abscess-occurring-at-the-same-level-of-cervical-destructive-spondyloarthropathy-a-case-report
#2
Jun-Seok Lee, Ji-Hyun Ryu, Jong-Tae Park, Ki-Won Kim
BACKGROUND: Destructive spondyloarthropathy (DSA) is one of the major complications in patients undergoing long-term hemodialysis. To the best of our knowledge, an epidural abscess occurring at the level of preexisting cervical DSA has not been well described in the literature. We report a unique case of quadriplegia caused by an epidural abscess occurring at the same level of preexisting cervical DSA. CASE PRESENTATION: A 49-year-old woman was transferred to our emergency department with 5 days of sepsis, drowsy mental status, and quadriplegia below the C5 level...
January 10, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28066967/artepillin-c-and-phenolic-compounds-responsible-for-antimicrobial-and-antioxidant-activity-of-green-propolis-and-baccharis-dracunculifolia-dc
#3
R S Veiga, S Mendonça, P B Mendes, N Paulino, M J Mimica, A A Lagareiro Netto, I S Lira, B G C López, V Negrão, M C Marcucci
AIMS: This study investigates the antimicrobial activity in Staphylococcus aureus isolates (MSSA - Methicillin Sensitive Staphylococcus aureus and MRSA - Methicillin Resistant Staphylococcus aureus) and antioxidant activity of green propolis, Baccharis dracunculifolia DC extracts and Artepillin C(™) . METHODS AND RESULTS: The amount of Artepillin C in different extracts was determined by HPLC analysis. Minimum Inhibitory Concentrations 90 (MIC90) was determined using 40 isolates of Staphylococcus aureus inoculated in Müeller-Hinton agar culture medium containing the green-propolis and Baccharis dracunculifolia DC extracts...
January 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28066112/in-vitro-effectiveness-of-triterpenoids-and-their-synergistic-effect-with-antibiotics-against-staphylococcus-aureus-strains
#4
Muhammad Hamza, Maha Nadir, Nadir Mehmood, Adeel Farooq
OBJECTIVES: The aim of this study is to evaluate the effect of four triterpenoids such as oleanolic acid, ursolic acid, cycloastragenol, and beta-boswellic acid alone and in combination with antibiotics against Staphylococcus aureus strains. MATERIALS AND METHODS: Sixteen clinical strains of S. aureus from infected wounds were isolated. Eight were methicillin-sensitive S. aureus (MSSA), and the other eight were methicillin-resistant S. aureus (MRSA). The activity was also seen in reference S...
November 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28063354/diaryltriazenes-as-antibacterial-agents-against-methicillin-resistant-staphylococcus-aureus-mrsa-and-mycobacterium-smegmatis
#5
Jure Vajs, Conor Proud, Anamaria Brozovic, Martin Gazvoda, Adrian Lloyd, David I Roper, Maja Osmak, Janez Košmrlj, Christopher G Dowson
Diaryltriazene derivatives were synthesized and evaluated for their antimicrobial properties. Initial experiments showed some of these compounds to have activity against both methicillin-resistant strains of Staphylococus aureus (MRSA) and Mycobacterium smegmatis, with MICs of 0.02 and 0.03 μg/mL respectively. Those compounds with potent anti-staphylococcal and anti-mycobacterial activity were not found to act as growth inhibitors of mammalian cell lines or yeast. Furthermore, we demonstrated that one of the most active anti-MRSA diaryltriazene derivatives was subject to very low frequencies of resistance at <10(-9)...
December 31, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28060853/a-cationic-amphiphilic-random-copolymer-with-ph-responsive-activity-against-methicillin-resistant-staphylococcus-aureus
#6
Sungyoup Hong, Haruko Takahashi, Enrico T Nadres, Hamid Mortazavian, Gregory A Caputo, John G Younger, Kenichi Kuroda
In this report, we demonstrate the pH-dependent, in vitro antimicrobial activity of a cationic, amphiphilic random copolymer against clinical isolates of drug-resistant Staphylococcus aureus. The polymer was developed toward a long-term goal of potential utility in the treatment of skin infections. The proposed mechanism of action of the polymer is through selectively binding to bacterial membranes and subsequent disruption of the membrane structure/integrity, ultimately resulting in bacterial cell death. The polymer showed bactericidal activity against clinical isolates of methicillin-resistant or vancomycin-intermediate S...
2017: PloS One
https://www.readbyqxmd.com/read/28053508/critical-role-of-tedizolid-in-the-treatment-of-acute-bacterial-skin-and-skin-structure-infections
#7
REVIEW
Olivia Ferrández, Olatz Urbina, Santiago Grau
Tedizolid phosphate has high activity against the Gram-positive microorganisms mainly involved in acute bacterial skin and skin structure infections, such as strains of Staphylococcus aureus (including methicillin-resistant S. aureus strains and methicillin-sensitive S. aureus strains), Streptococcus pyogenes, Streptococcus agalactiae, the Streptococcus anginosus group, and Enterococcus faecalis, including those with some mechanism of resistance limiting the use of linezolid. The area under the curve for time 0-24 hours/minimum inhibitory concentration (MIC) pharmacodynamic ratio has shown the best correlation with the efficacy of tedizolid, versus the time above MIC ratio and the maximum drug concentration/minimum inhibitory concentration ratio...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28036314/etiology-of-early-onset-septicemia-among-neonates-at-the-university-college-hospital-ibadan-nigeria
#8
Abimbola Ellen Akindolire, Olukemi Tongo, Hannah Dada-Adegbola, Olusegun Akinyinka
INTRODUCTION: Neonatal septicemia remains a major cause of newborn deaths in developing countries. Its burden is further compounded by the emergence of multidrug-resistant pathogens, which is related to a lack of antibiotic protocols resulting in unrestricted use of antibiotics. The absence of reliable antibiotic sensitivity testing makes the formulation of antibiotic guidelines and judicious use of antibiotics difficult. This study sought to identify the current bacterial agents associated with early onset septicemia (EOS; age <72 hours) and their antibiotic susceptibility patterns among neonates at the University College Hospital, Ibadan, Nigeria...
December 30, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28034470/-cutaneous-granular-bacteriosis-occurring-in-staphylococcus-aureus-septicaemia
#9
D Mermin, A-L Védie, M-L Jullie, A Fauconneau, M Beylot-Barry, A Pham-Ledard
BACKGROUND: Herein we report a case of cutaneous granular bacteriosis, with discussion of the nosological setting of this entity based upon the clinical and histological findings. PATIENTS AND METHODS: A 62-year-old woman receiving methotrexate for Sezary syndrome was admitted for fever of 38.5̊C and overall impairment of her health. She presented a fistulous nodule on her right knee, and skin biopsy revealed a focus of ulcerated suppuration with quantities of Gram+ and Grocott+ granules containing no filament, enclosed by eosinophilic matter (Splendore-Hoeppli phenomenon)...
December 26, 2016: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28028447/spinal-epidural-abscess-in-a-patient-with-piriformis-pyomyositis
#10
Gerald S Oh, Hussam Abou-Al-Shaar, Gregory D Arnone, Ashley L Barks, Ziad A Hage, Sergey Neckrysh
BACKGROUND: Spinal epidural abscess resulting from piriformis pyomyositis is extremely rare. Such condition can result in serious morbidity and mortality if not addressed in a timely manner. CASE DESCRIPTION: The authors describe the case of a 19-year-old male presenting with a 2-week history of fever, low back pain, and nuchal rigidity. When found to have radiographic evidence of a right piriformis pyomyositis, he was transferred to our institution for further evaluation...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/28027714/impact-of-national-policies-on-the-microbial-aetiology-of-surgical-site-infections-in-acute-nhs-hospitals-in-england-analysis-of-trends-between-2000-and-2013-using-multi-centre-prospective-cohort-data
#11
S Elgohari, J Wilson, A Saei, E A Sheridan, T Lamagni
Our study aimed to evaluate changes in the epidemiology of pathogens causing surgical site infections (SSIs) in England between 2000 and 2013 in the context of intensified national interventions to reduce healthcare-associated infections introduced since 2006. National prospective surveillance data on target surgical procedures were used for this study. Data on causative organism were available for 72% of inpatient-detected SSIs meeting the standard case definitions for superficial, deep and organ-space infections (9767/13 531) which were analysed for trends...
December 28, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/28012099/thrombocytopaenia-during-methicillin-sensitive-staphylococcus-aureus-bacteraemia
#12
E Forsblom, I Tielinen, E Ruotsalainen, A Järvinen
The prognostic impact of thrombocytopaenia in Staphylococcus aureus bacteraemia (SAB) has previously been determined at bacteraemia onset only and relevant pre-bacteraemic thrombocytopaenia predisposing parameters have not been accounted for. We evaluated the prognostic impact of low thrombocyte count in SAB excluding pre-bacteraemic factors potentially causing thrombocytopaenia. This was a multicentre retrospective analysis of methicillin-sensitive SAB (MS-SAB) patients. Thrombocyte count was determined at blood culture collection and at days 3 and 7...
December 23, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28010909/a-meta-analysis-of-the-rates-of-staphylococcus-aureus-and-methicillin-resistant-s-aureus-contamination-on-the-surfaces-of-environmental-objects-that-health-care-workers-frequently-touch
#13
REVIEW
Dongxin Lin, Qianting Ou, Jialing Lin, Yang Peng, Zhenjiang Yao
BACKGROUND: Health care workers may potentially spread Staphylococcus aureus and methicillin-resistant S aureus (MRSA) to patients by contaminated high-touch items. We aimed to determine the pooled rates of S aureus and MRSA contamination and influencing factors. METHODS: A literature search of the PubMed, ScienceDirect, Embase, Ovid, and Scopus databases was performed. Pooled contamination rates were determined using random effect models. Subgroup and meta-regression analyses were conducted to identify factors potentially influencing the rates of S aureus and MRSA contamination...
December 20, 2016: American Journal of Infection Control
https://www.readbyqxmd.com/read/28004323/rapid-mrsa-pcr-on-respiratory-specimens-from-ventilated-patients-with-suspected-pneumonia-a-tool-to-facilitate-antimicrobial-stewardship
#14
S E Trevino, M A Pence, J Marschall, M H Kollef, H M Babcock, C-A D Burnham
Methicillin-resistant Staphylococcus aureus (MRSA) is an important cause of pneumonia in ventilated patients. Our objective was to evaluate the GeneXpert MRSA/SA SSTI Assay (Xpert MRSA/SA) (Cepheid, Sunnyvale, CA) for use in lower respiratory tract (LRT) specimens for rapid MRSA detection and to determine the potentially saved antibiotic-days if a culture-based identification method was replaced by this assay. Remnant LRT samples from ventilated patients submitted to the microbiology laboratory for routine culture were tested using conventional culture and Xpert MRSA/SA...
December 21, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27999423/characterization-of-community-associated-staphylococcus-aureus-from-skin-and-soft-tissue-infections-a-multicenter-study-in-china
#15
Ying Liu, Zhe Xu, Zhou Yang, Juan Sun, Lin Ma
We evaluated the epidemiological and molecular features of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) and methicillin-sensitive S. aureus (MSSA) from children and adult patients with skin and soft-tissue infections (SSTIs) in China. Prospective community-acquired S. aureus SSTI surveillance was conducted in 23 hospitals over a 24-month period. Susceptibility to 16 antimicrobials was evaluated using the agar dilution method. StatApriori was used to determine statistically significant association trends...
December 21, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27992988/-risk-factors-for-methicillin-resistant-staphylococcus-aureus-bacteremia-a-multicenter-matched-case-control-study
#16
Paola Mariana Arias-Ortiz, Libia Del Pilar Calderón, Juan Sebastián Castillo, José Moreno, Aura Lucía Leal, Jorge Alberto Cortés, Carlos Arturo Álvarez, Grupo Grebo
INTRODUCTION: Methicillin-resistant Staphylococcus aureus is a frequent pathogen at critical care services. Its presence leads to increased hospital stays and mortality risk in patients with bacteremia. However, the etiology of this resistance marker has not been fully studied. OBJECTIVE: To identify risk factors associated with the emergence of methicillin-resistant S. aureus bacteremia in critically ill patients treated at intensive care units in Bogotá, Colombia...
December 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/27992817/rapid-detection-of-methicillin-resistant-staphylococcus-aureus-in-pork-using-a-nucleic-acid-based-lateral-flow-immunoassay
#17
Hongwei Zhang, Luyao Ma, Lina Ma, Marti Z Hua, Shuo Wang, Xiaonan Lu
Methicillin-resistant Staphylococcus aureus (MRSA) is considered as one of the leading causes of food poisonings worldwide. Due to the high prevalence and extensive challenges in clinical treatment, a rapid and accurate detection method is required to differentiate MRSA from other S. aureus isolated from foods. Since the methicillin resistance of S. aureus is due to the acquisition of the mecA gene from staphylococcal chromosome cassette, the presence of the mecA gene is interpreted as a marker for the identification of MRSA...
December 11, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27987047/evaluation-of-the-novel-artus-c-difficile-qs-rgq-vanr-qs-rgq-and-mrsa-sa-qs-rgq-assays-for-the-laboratory-diagnosis-of-clostridium-difficile-infection-cdi-and-for-vancomycin-resistant-enterococci-vre-and-methicillin-resistant-staphylococcus-aureus-mrsa-screening
#18
K A Morris, L R Macfarlane-Smith, M H Wilcox
Clostridium difficile, methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE) are worldwide prevalent healthcare-associated pathogens. We have evaluated three Qiagen artus QS-RGQ assays for the detection of these pathogens. We examined 200 stool samples previously tested for C. difficile infection (CDI), 94 rectal swabs previously screened for VRE and 200 MRSA screening nasal swabs. With the routine diagnostic laboratory results being adopted as the gold standard, the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the artus C...
December 16, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27981921/emerging-trends-of-bloodstream-infections-a-six-year-study-at-a-paediatric-tertiary-care-hospital-in-kabul
#19
Tariq Mahmud Tariq, Esmatullah Rasool
OBJECTIVE: To determine the frequency of pathogens causing bloodstream infections and evaluate their trends and antibiogram patterns among in-patients in a paediatric tertiary care centre. STUDY DESIGN: Descriptive study. PLACE AND DURATION OF STUDY: French Medical Institute for Mothers and Children (FMIC), Kabul, Afghanistan in two phases, from January 2010 to December 2015. METHODOLOGY: Results of blood cultures from suspected cases of sepsis admitted in the FMIC, from January 2010 to December 2012 (Period-1), and from January 2013 to December 2015 (Period-2) were completed...
November 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27974958/frequency-of-antiseptic-resistance-among-staphylococcus-aureus-and-coagulase-negative-staphylococci-isolated-from-a-university-hospital-in-central-iran
#20
Nona Taheri, Abdollah Ardebili, Alireza Amouzandeh-Nobaveh, Ehsanollah Ghaznavi-Rad
OBJECTIVES: Reduced biocide susceptibility in Staphylococci is associated with various antiseptic resistance genes encoding efflux systems. Our aim was to determine the susceptibility to three disinfectant agents, including benzalkonium chloride (BAC), benzethonium chloride (BZT), and chlorhexidine digluconate (CHDG) among clinical isolates of Staphylococcus aureus and coagulase-negative Staphylococci (CoNS). METHODS: The minimum inhibitory concentration (MIC) of 60 methicillin-resistant S...
November 2016: Oman Medical Journal
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