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Antibiotic resistant Staphylococcus

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https://www.readbyqxmd.com/read/28806528/surface-adaptive-gold-nanoparticles-with-effective-adherence-and-enhanced-photothermal-ablation-of-methicillin-resistant-staphylococcus-aureus-biofilm
#1
Dengfeng Hu, Huan Li, Bailiang Wang, Zi Ye, Wenxi Lei, Fan Jia, Qiao Jin, Ke-Feng Ren, Jian Ji
Biofilms which contribute to the persistent bacterial infections pose serious threats to global public health, mainly due to their resistance to antibiotics penetration and escaping innate immune attacks by phagocytes. Here, we report a kind of surface-adaptive gold nanoparticles (AuNPs) exhibiting (1) self-adaptive target to the acidic microenvironment of biofilm, (2) enhanced photothermal ablation of methicillin-resistant Staphylococcus aureus (MRSA) biofilm under near-infrared (NIR) light irradiation and (3) no damage to the healthy tissues around biofilm...
August 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28804601/policy-implementation-for-methicillin-resistant-staphylococcus-aureus-in-seven-european-countries-a-comparative-analysis-from-1999-to-2015
#2
Takuya Kinoshita, Hironobu Tokumasu, Shiro Tanaka, Axel Kramer, Koji Kawakami
Background: Policies to reduce methicillin-resistant Staphylococcus aureus (MRSA) infections, both healthcare-acquired (HA-MRSA) and livestock-associated (LA-MRSA) are implemented Europe-wide, but evaluations are difficult for countries yet to implement such policies. A descriptive study was conducted, describing multinational MRSA rates and policy implementation, focusing on MRSA mandatory surveillance. We also investigated antibiotic use and MRSA rates and the use of veterinary antibiotics. Methods: This study used Europe-wide surveillance data on infectious diseases (EARS-Net), antibiotic consumption (ESAC-Net), and veterinary medicine (ESVAC)...
2017: Journal of Market Access & Health Policy
https://www.readbyqxmd.com/read/28804007/antibiotic-therapy-duration-for-prosthetic-joint-infections-treated-by-debridement-and-implant-retention-dair-similar-long-term-remission-for-6-weeks-as-compared-to-12-weeks
#3
Hélène Chaussade, Ilker Uçkay, Albert Vuagnat, Jérôme Druon, Guillaume Gras, Philippe Rosset, Benjamin A Lipsky, Louis Bernard
BACKGROUND: The required duration of antibiotic treatment for prosthetic joint infections (PJI) with debridement and retention of the implant (DAIR procedure) is unknown. METHODS: Multicenter retrospective study emphasizing the duration of antibiotic therapy in patients treated with by DAIR. RESULTS: We included 87 hip or knee PJI episodes in 87 patients from three university hospitals in France and Switzerland. All debridements were performed within 3 weeks of symptom onset...
August 10, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28803587/the-rise-of-methicillin-resistant-staphylococcus-aureus-now-the-dominant-cause-of-skin-and-soft-tissue-infection-in-central-australia
#4
E Macmorran, S Harch, E Athan, S Lane, S Tong, L Crawford, S Krishnaswamy, S Hewagama
This study aimed to examine the epidemiology and treatment outcomes of community-onset purulent staphylococcal skin and soft tissue infections (SSTI) in Central Australia. We performed a prospective observational study of patients hospitalised with community-onset purulent staphylococcal SSTI (n = 160). Indigenous patients accounted for 78% of cases. Patients were predominantly young adults; however, there were high rates of co-morbid disease. Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) was the dominant phenotype, accounting for 60% of cases...
August 14, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28803460/-gastrostomy-tubes-indications-and-infectious-complications-in-a-tertiary-hospital
#5
M J Muñoz-Dávila, J M Xandri Ruipera, G Yagüe Guirao, C Salvador García, M Segovia Hernández
OBJECTIVE: Gastrostomy tube is the best option for long-term enteral nutrition. Among its limitations, infections represent the most frequent minor complication. Our aim is the knowledge of the number and type of gastrostomy tubes and its main indication in our hospital. In addition, prevalence of infectious complications was studied paying attention to the main etiologic agents and their antibiotic susceptibility. METHODS: Observational retrospective study from January 2010 to July 2015 through the electronic clinical history and the clinical microbiology laboratory software...
August 14, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28802058/postantibiotic-effect-and-postantibiotic-sub-mic-effect-of-ltx-109-and-mupirocin-on-staphylococcus-aureus-blood-isolates
#6
Louis D Saravolatz, Joan Pawlak, Hayley Martin, Stephanie Saravolatz, Leonard Johnson, Hedda Wold, Mette Husbyn, Wenche Marie Olsen
The development of new synthetic antimicrobial peptides like LTX-109 provides a new class of drugs for the treatment of Staphylococcus aureus infections. We evaluated LTX-109 and mupirocin for pharmacodynamic parameters against 10 methicillin-resistant S. aureus isolates. The post antibiotic effect (PAE) is defined as the length of time that bacterial growth is suppressed following a brief exposure to an antibiotic. We also determined the sub-MIC effect (SME) which measures the direct effect of sub-inhibitory levels on strains that have not previously been exposed to antibiotics...
August 12, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28800088/upregulation-and-identification-of-antibiotic-activity-of-a-marine-derived-streptomyces-sp-via-co-cultures-with-human-pathogens
#7
Anne A Sung, Samantha M Gromek, Marcy J Balunas
Marine natural product drug discovery has begun to play an important role in the treatment of disease, with several recently approved drugs. In addition, numerous microbial natural products have been discovered from members of the order Actinomycetales, particularly in the genus Streptomyces, due to their metabolic diversity for production of biologically active secondary metabolites. However, many secondary metabolites cannot be produced under laboratory conditions because growth conditions in flask culture differ from conditions in the natural environment...
August 11, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28797969/bioactive-mesoporous-silica-nanostructures-with-anti-microbial-and-anti-biofilm-properties
#8
Paul Cătălin Balaure, Bianca Boarca, Roxana Cristina Popescu, Diana Savu, Roxana Trusca, Bogdan Ștefan Vasile, Alexandru Mihai Grumezescu, Alina Maria Holban, Alexandra Bolocan, Ecaterina Andronescu
The increasing rate of antibiotic resistant bacteria associated with nosocomial infections in severely ill patients has urged the need for new antibacterial therapies. Nanostructured materials represent emerging innovative approaches to controlled delivery of different antimicrobial drugs. Delivery systems encapsulating natural compounds with antibacterial effects, such as essential oils have shown a great potential. Herein we report the development of SiO2 mesoporous nanosystems loaded with eucalyptus (EUC), orange (ORA), and cinnamon (CIN) essential oils...
August 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28797802/antibiotic-susceptibilities-and-prevalence-of-methicillin-resistant-staphylococcus-aureus-mrsa-isolated-from-bovine-milk-in-pakistan
#9
Amjad Islam Aqib, Muhammad Ijaz, Aftab Ahmad Anjum, Muhammad Abdul Rauf Malik, Khalid Mehmood, Shahid Hussain Farooqi, Kashif Hussain
The study was designed to investigate bovine milk for prevalence of an emerging zoonotic pathogen Methicillin resistant Staphylococcus aureus (MRSA), and in-vitro therapeutic response of various antibiotics against MRSA. Nine hundred (900) milk samples were collected (half from cattle and half from buffalo) from private and public farms located in various tehsils of district Faisalabad, using the convenient sampling method. Milk samples were put to biochemical identification of Staphylococcus aureus and later oxacilline disk sensitivity testing for confirmation of MRSA...
August 7, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28797646/spinal-epidural-abscess-a-series-of-101-cases
#10
Martin Vakili, Nancy F Crum-Cianflone
BACKGROUND: Spinal epidural abscesses are uncommon but potentially devastating infections that often elude early diagnosis. An increasing incidence has been suggested; however, few contemporary data are available regarding risk factors and epidemiologic trends over time. METHODS: A retrospective study of spinal epidural abscesses from 2004 to 2014 at a large academic hospital was conducted. Cases were identified using ICD-9 code 324.1, and a review of medical and radiographic records was performed to confirm each case...
August 7, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28797573/digestive-decontamination-in-burn-patients-a-systematic-review-of-randomized-clinical-trials-and-observational-studies
#11
REVIEW
Mercedes Rubio-Regidor, Ana Martín-Pellicer, Luciano Silvestri, Hendrik K F van Saene, José A Lorente, Miguel A de la Cal
OBJECTIVE: The objective of this systematic review is to assess the effect of selective digestive decontamination (SDD) or non-absorbable enteral antibiotics (EA) on mortality, the incidence of infection and its adverse effects in burn patients. MATERIAL AND METHODS: Systematic review of randomized clinical trials (RCT) or observational studies enrolling burn patients, and comparing SDD or EA prophylaxis with placebo or no treatment. The search includes Pubmed/Medline, EMBASE, WOS, Cochrane Library (1970-2015)...
August 7, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28797064/bacteriological-profiling-of-diphenylureas-as-a-novel-class-of-antibiotics-against-methicillin-resistant-staphylococcus-aureus
#12
Haroon Mohammad, Waleed Younis, Hany G Ezzat, Christine E Peters, Ahmed AbdelKhalek, Bruce Cooper, Kit Pogliano, Joe Pogliano, Abdelrahman S Mayhoub, Mohamed N Seleem
Bacterial resistance to antibiotics remains an imposing global public health challenge. Of the most serious pathogens, methicillin-resistant Staphylococcus aureus (MRSA) is problematic given strains have emerged that exhibit resistance to several antibiotic classes including β-lactams and agents of last resort such as vancomycin. New antibacterial agents composed of unique chemical scaffolds are needed to counter this public health challenge. The present study examines two synthetic diphenylurea compounds 1 and 2 that inhibit growth of clinically-relevant isolates of MRSA at concentrations as low as 4 µg/mL and are non-toxic to human colorectal cells at concentrations up to 128 μg/mL...
2017: PloS One
https://www.readbyqxmd.com/read/28796008/methicillin-resistant-staphylococcus-aureus-in-cystic-fibrosis-how-should-it-be-managed
#13
Marianne S Muhlebach
PURPOSE OF REVIEW: Methicillin-resistant Staphylococcus aureus (MRSA) remains prevalent in people with cystic fibrosis (CF). As chronic infection with worse pulmonary outcomes develops frequently, the organism is concerning to CF providers and patients. This review describes current epidemiology, our understanding of risk factors for MRSA infection, and relevant aspects of treatment with review of new and ongoing trials. RECENT FINDINGS: Prevalence ranges from a low of 3 to 4% in some European countries to a high of approximately 26% in the United States...
August 8, 2017: Current Opinion in Pulmonary Medicine
https://www.readbyqxmd.com/read/28794175/a-comparative-genomics-study-of-staphylococcus-epidermidis-from-orthopedic-device-related-infections-correlated-with-patient-outcome
#14
Virginia Post, Llinos G Harris, Mario Morgenstern, Leonardos Mageiros, Matthew D Hitchings, Guillaume Méric, Ben Pascoe, Samuel K Sheppard, R Geoff Richards, T Fintan Moriarty
Staphylococcus epidermidis has emerged as an important opportunistic pathogen causing orthopedic device-related infections (ODRIs). This study investigated the association of genome variation and phenotypic features of the infecting S. epidermidis isolate with the clinical outcome of the infected patient. S. epidermidis isolates were collected from 104 patients with ODRI. Their clinical outcome was evaluated, after an average of 26 months, as either "cured" or "not cured". The isolates were tested for antibiotic susceptibility and biofilm formation...
August 9, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28789974/beta-lactam-combination-therapy-for-treatment-of-staphylococcus-aureus-and-enterococcus-species-bacteremias-a-summary-and-appraisal-of-the-evidence
#15
REVIEW
Rachel Bartash, Priya Nori
Staphylococcal and Enterococcal bacteremias are prevalent in hospitalized, or recently instrumented patients, and associated with significant morbidity and mortality. They are often difficult to treat due to the pathogenicity of the organisms, poor response to antibiotics, and increasing development of multidrug resistance. Therefore, there has been increasing interest in combination therapy for treatment of these infections. This review aims to summarize and assess the evidence supporting combination beta-lactam therapy for both Staphylococcus aureus and Enterococcus species blood stream infections...
August 5, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28789605/analysis-of-distribution-and-antibiotic-resistance-of-pathogens-isolated-from-the-paediatric-population-in-shenmu-hospital-from-2011-2015
#16
Yang Hui-Min, Wang Yan-Ping, Yong Lin Liu, Bilal Haider Shamsi, He Bo, Meng Xu-Chun
Objective This study aimed to investigate the epidemiology and changes in antibacterial susceptibility of children in Shenmu City, northern Shaanxi, and provide a basis for rational drug use. Methods The distribution and drug resistance pattern of pathogenic bacteria isolated from children were retrospectively analysed. Results A total of 573 strains of pathogens were cultivated. A total of 201 (35.07%) strains of Gram-positive cocci and 183 (31.93%) strains of Gram-negative cocci were detected. A total of 189 (32...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28783679/a-tslp-complement-axis-mediates-neutrophil-killing-of-methicillin-resistant-staphylococcus-aureus
#17
Erin E West, Rosanne Spolski, Majid Kazemian, Zu Xi Yu, Claudia Kemper, Warren J Leonard
Community-acquired Staphylococcus aureus infections often present as serious skin infections in otherwise healthy individuals and have become a worldwide epidemic problem fueled by the emergence of strains with antibiotic resistance, such as methicillin-resistant S. aureus (MRSA). The cytokine thymic stromal lymphopoietin (TSLP) is highly expressed in the skin and in other barrier surfaces and plays a deleterious role by promoting T helper cell type 2 (TH2) responses during allergic diseases; however, its role in host defense against bacterial infections has not been well elucidated...
November 18, 2016: Science Immunology
https://www.readbyqxmd.com/read/28782933/new-insights-into-antibiofilm-effect-of-a-nano-sized-zno-coating-against-the-pathogenic-methicillin-resistant-staphylococcus-aureus
#18
Marta M Alves, Ons Bouchami, Ana Tavares, Laura Córdoba, Catarina Ferreira Santos, Maria Miragaia, Maria de Fatima Montemor
ZnO nanoparticles (NPs) are arising as promising novel antibiotics towards device-related infections. The surface functionalization of Zn, a novel resorbable biomaterial, with ZnO NPs could present an effective solution to overcome such threat. In this sense, the antibacterial and antibiofilm activity of nano and micro-sized ZnO coatings was studied against clinically relevant bacteria - methicillin resistant Staphylococcus aureus (MRSA). The bacterial viability of planktonic and biofilm cells together with the corresponding biofilms structures revealed that only the nano-sized ZnO coating had an antibiofilm effect...
August 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28781994/rapid-antibiotic-sensitivity-testing-in-microwell-arrays
#19
Fatemeh Jalali, Felix Ellett, Daniel Irimia
The widespread bacterial resistance to a broad range of antibiotics necessitates rapid antibiotic susceptibility testing before effective treatment could start in the clinic. Among resistant bacteria, Staphylococcus aureus is one of the most important, and Methicillin-resistant (MRSA) strains are a common cause of life threatening infections. However, standard susceptibility testing for S. aureus is time consuming and thus the start of effective antibiotic treatment is often delayed. To circumvent the limitations of current susceptibility testing systems, we designed an assay that enables measurements of bacterial growth with higher spatial and temporal resolution than standard techniques...
June 2017: Technology
https://www.readbyqxmd.com/read/28773899/evaluation-of-the-antimicrobial-activity-of-different-antibiotics-enhanced-with-silver-doped-hydroxyapatite-thin-films
#20
Daniela Predoi, Cristina Liana Popa, Patrick Chapon, Andreea Groza, Simona Liliana Iconaru
The inhibitory and antimicrobial effects of silver particles have been known since ancient times. In the last few years, a major health problem has arisen due to pathogenic bacteria resistance to antimicrobial agents. The antibacterial activities of new materials including hydroxyapatite (HAp), silver-doped hydroxyapatite (Ag:HAp) and various types of antibiotics such as tetracycline (T-HAp and T-Ag:HAp) or ciprofloxacin (C-HAp and C-Ag:HAp) have not been studied so far. In this study we reported, for the first time, the preparation and characterization of various thin films based on hydroxyapatite and silver-doped hydroxyapatite combined with tetracycline or ciprofloxacin...
September 16, 2016: Materials
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