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mrsa and bacteremia

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https://www.readbyqxmd.com/read/29347812/reevaluation-of-the-impact-of-methicillin-resistance-on-outcomes-in-patients-with-staphylococcus-aureus-bacteremia-and-endocarditis
#1
Eun-Jeong Joo, Dong Ah Park, Cheol-In Kang, Doo Ryeon Chung, Jae-Hoon Song, Sang Moo Lee, Kyong Ran Peck
Background/Aims: Methicillin-resistant Staphylococcus aureus (MRSA) is highly prevalent in hospitals, and has recently emerged in the community. The impact of methicillin-resistance on mortality and medical costs for patients with S. aureus bacteremia (SAB) requires reevaluation. Methods: We searched studies with SAB or endocarditis using electronic databases including Ovid-Medline, Embase-Medline, and Cochrane Library, as well as five local databases for published studies during the period January 2000 to September 2011...
January 20, 2018: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29333818/community-acquired-methicillin-resistant-staphylococcus-aureus-infections-hospitalization-and-case-fatality-risk-in-10-pediatric-facilities-in-argentina
#2
Ángela Gentile, Julia Bakir, Gabriela Ensinck, Aldo Cancellara, Enrique V Casanueva, Verónica Firpo, Martín Caruso, María F Lución, Alejandro Santillán Iturres, Fabiana Molina, Héctor J Abate, Andrea Gajo Gane, Santiago López Papucci
INTRODUCTION: Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) infections are prevalent both in Argentina and worldwide, and they may have a severe clinical course. OBJECTIVES: To estimate the hospitalization rate and case fatality risk factors of CA-MRSA infection. METHODS: Cross-sectional, analytical study. All patients < 15 years old with community-acquired Staphylococcus aureus (CA-SA) infections admitted to 10 pediatric facilities between January 2012 and December 2014 were included...
February 1, 2018: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/29298323/implementation-of-global-antimicrobial-resistance-surveillance-system-glass-in-patients-with-bacteremia
#3
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/29235661/association-of-higher-daptomycin-dose-%C3%A2-7-mg-kg-with-improved-survival-in-patients-with-methicillin-resistant-staphylococcus-aureus-bacteremia
#4
Tristan T Timbrook, Aisling R Caffrey, Megan K Luther, Vrishali Lopes, Kerry L LaPlante
STUDY OBJECTIVE: Current guidelines recommend higher daptomycin doses than the daptomycin label dose of 6 mg/kg for methicillin-resistant Staphylococcus aureus (MRSA) bacteremia; however, the evidence supporting this recommendation is from in vitro and cases series studies. The objective of this study was to evaluate the comparative effectiveness of the daptomycin label dose versus higher daptomycin doses in patients with MRSA bacteremia. DESIGN: Retrospective national cohort study...
December 13, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/29228127/antibiotic-resistance-and-the-risk-of-recurrent-bacteremia
#5
Sjoukje H S Woudt, Sabine C de Greeff, Annelot F Schoffelen, Anne L M Vlek, Marc J M Bonten
Background: Direct health effects of antibiotic resistance are difficult to assess. We quantified the risk of recurrent bacteremia associated with antibiotic resistance. Methods: We extracted antimicrobial susceptibility testing data on blood isolates of Enterobacteriaceae, Pseudomonas spp., Enterococcus spp. and Staphylococcus aureus from the Dutch surveillance system for antimicrobial resistance between 2008 and 2017. First and first recurrent (4-30days) bacteremia episodes were categorized as susceptible, single non-susceptible or co-non-susceptible (I/R), to 3rd generation cephalosporins -/+ carbapenems (Enterobacteriaceae), ceftazidime -/+ carbapenems (Pseudomonas spp...
December 7, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29222405/multiple-weekly-dalbavancin-dosing-for-the-treatment-of-native-vertebral-osteomyelitis-caused-by-methicillin-resistant-staphylococcus-aureus-a-case-report
#6
Thamer A Almangour, Valerie Fletcher, Mohammed Alessa, Abdullah A Alhifany, Deanne Tabb
BACKGROUND Native vertebral osteomyelitis (NVO) is a common form of hematogenous osteomyelitis, with Staphylococcus aureus (S. aureus) being the most commonly isolated organism. Dalbavancin is approved by the US Food and Drug Administration (FDA) for the treatment of acute bacterial skin and skin structure infections (ABSSSI) and has a sufficiently promising pharmacokinetic and pharmacodynamic profile to be considered for the treatment of vertebral osteomyelitis. We describe here what is probably the first reported case of using multiple weekly dalbavancin to treat a complicated methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and vertebral osteomyelitis...
December 9, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29203479/host-pathogen-treatment-triad-host-factors-matter-most-in-mrsa-bacteremia-outcomes
#7
M Cristina Vazquez Guillamet, Rodrigo Vazquez, Benjamin Deaton, Jenny Shroba, Laia Vazquez, Renee-Claude Mercier
Background: Previous studies have separately emphasized the importance of host, pathogen and treatment characteristics in determining short term or in-hospital mortality for patients with methicillin resistant Staphylococcus aureus (MRSA) bloodstream infections. Less is known about the relative importance of these factors and their interaction in determining short, medium and long-term mortality.Methods: This is an observational cohort study where all patients admitted to University of New Mexico Health Sciences Center (UNM HSC) between July 2002 and August 2013 with MRSA positive blood cultures were recorded...
December 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29180523/efficacy-of-novel-anti-staphylococcal-ectolysin-p128-in-a-rat-model-of-methicillin-resistant-staphylococcus-aureus-mrsa-bacteremia
#8
Shankaramurthy Channabasappa, Murali Durgaiah, Ravisha Chikkamadaiah, Senthil Kumar, Amruta Joshi, Bharathi Sriram
Staphylococcus aureus (S.aureus) causes systemic infections with high morbidity and mortality and emergence of drug resistance strains are a rapidly growing clinical concerns. Novel therapeutic agents are required to tackle S.aureus infections. P128 is a bacteriophage-derived chimeric ectolysin with potent and rapid bactericidal activity on S. aureus In the current study, efficacy of P128 was evaluated in a newly-developed rat model of S. aureus bacteremia. Prior to in vivo testing, P128 was shown to be stable in whole blood by incubation in rat blood for up to 6 hrs and testing of its bactericidal activity against MRSA isolate USA 300...
November 27, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29169153/optimal-trough-concentration-of-teicoplanin-in-febrile-neutropenic-patients-with-hematological-malignancy
#9
Yuhki Sato, Kazufumi Hiramatsu, Yosuke Suzuki, Ryota Tanaka, Tetsuya Kaneko, Ko Nonoshita, Masao Ogata, Jun-Ichi Kadota, Hiroki Itoh
BACKGROUND: Teicoplanin is a glycopeptide antibiotic currently used for the treatment of methicillin-resistant Staphylococcus aureus. The need for therapeutic drug monitoring of teicoplanin has been increasingly highlighted as important. It is generally accepted that whereas a plasma trough concentration (Cmin) of ≥10 mg/L is appropriate for the majority of infections, it should exceed 20 mg/L for severe infections. The target Cmin of teicoplanin in patients with febrile neutropenia (FN) has not been reported...
November 24, 2017: Chemotherapy
https://www.readbyqxmd.com/read/29163457/the-agr-quorum-sensing-system-represses-persister-formation-through-regulation-of-phenol-soluble-modulins-in-staphylococcus-aureus
#10
Tao Xu, Xu-Yang Wang, Peng Cui, Yu-Meng Zhang, Wen-Hong Zhang, Ying Zhang
The opportunistic pathogen Staphylococcus aureus has become an increasing threat to public health. While the Agr quorum sensing (QS) system is a master regulator of S. aureus virulence, its dysfunction has been frequently reported to promote bacteremia and mortality in clinical infections. Here we show that the Agr system is involved in persister formation in S. aureus. Mutation of either agrCA or agrD but not RNAIII resulted in increased persister formation of stationary phase cultures. RNA-seq analysis showed that in stationary phase AgrCA/AgrD and RNAIII mutants showed consistent up-regulation of virulence associated genes (lip and splE, etc...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29161942/trends-in-incidence-and-resistance-patterns-of-staphylococcus-aureus-bacteremia
#11
Elina Jokinen, Janne Laine, Reetta Huttunen, Outi Lyytikäinen, Risto Vuento, Jaana Vuopio, Jaana Syrjänen
BACKGROUND: Staphylococcus aureus bacteremia (SAB) causes a significant burden on the population. Several infection control measures have been implemented in Pirkanmaa county to combat a local epidemic with methicillin-resistant Staphylococcus aureus (MRSA). We aimed to study the epidemiology of SAB and antibiotic resistance of S. aureus and the possible influence of improved infection control. METHODS: Register data from 2005 to 2015 were retrospectively analysed to study the antimicrobial susceptibility, the incidence and mortality in SAB in a population-based setting...
January 2018: Infectious Diseases
https://www.readbyqxmd.com/read/29156865/antibacterial-resistance-patterns-and-incidence-of-hospital-acquired-staphylococcus-aureus-bacteremia-in-a-tertiary-care-educational-hospital-in-turkey-a-perspective-from-2001-to-2013
#12
Oğuz Reşat Sipahi, Serhat Uysal, Sabire Şöhret Aydemir, Hüsnü Pullukçu, Meltem Taşbakan, Alper Tünger, Fatma Feriha Çilli, Tansu Yamazhan, Bilgin Arda, Hilal Sipahi, Sercan Ulusoy
Background/aim: Staphylococcus aureus is an important nosocomial pathogen and a successful antimicrobial-resistance developer. In this study we retrospectively evaluated the resistance patterns and incidence of microbiologically confirmed nosocomial bacteremia (MCNB) related S. aureus strains between 2001 and 2013. Materials and methods: Any patient in whom S. aureus was isolated in at least one set of blood cultures (sent to the bacteriology laboratory 72 h after hospital admission) was considered to have MCNB...
August 23, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29153470/impact-of-a-pharmacist-driven-care-package-on-staphylococcus-aureus-bacteremia-management-in-a-large-community-healthcare-network-a-propensity-score-matched-quasi-experimental-study
#13
Jordan R Smith, Jeremy J Frens, Cynthia B Snider, Kimberly C Claeys
OBJECTIVES: Staphylococcus aureus bacteremia (SAB) is an important cause of morbidity and mortality. Suboptimal treatment has been associated with poor patient outcomes. Our antimicrobial stewardship program (ASP) evaluated SAB management based on predefined performance measures both prior to and after instituting a "care package" intervention led by clinical pharmacists and infectious diseases physicians. The primary outcome included a 4-point "optimal care score" (OCS) consisting of targeted antibiotic therapy within 24hours, repeating blood cultures, antibiotic duration assessment, and appropriate duration of therapy...
October 7, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29149185/linezolid-and-atorvastatin-impact-on-pneumonia-caused-by-staphyloccocus-aureus-in-rabbits-with-or-without-mechanical-ventilation
#14
Laure-Anne Pauchard, Mathieu Blot, Rémi Bruyere, Saber-Davide Barbar, Delphine Croisier, Lionel Piroth, Pierre-Emmanuel Charles
Pneumonia may involve methicillin-resistant Staphylococcus aureus (MRSA), with elevated rates of antibiotics failure. The present study aimed to assess the effect of statins given prior to pneumonia development. Spontaneously breathing (SB) or mechanically ventilated (MV) rabbits with pneumonia received atorvastatin alone, linezolid (LNZ) alone, or a combination of both (n = 5 in each group). Spontaneously breathing and MV untreated infected animals (n = 11 in each group), as well as uninfected animals (n = 5 in each group) were used as controls...
2017: PloS One
https://www.readbyqxmd.com/read/29137718/telavancin-for-the-treatment-of-methicillin-resistant-staphylococcus-aureus-bone-and-joint-infections
#15
Julie Harting, Francisco Fernandez, Rob Kelley, Tim Wiemken, Paula Peyrani, Julio Ramirez
This retrospective, case series describes our experience with the use of telavancin in patients with methicillin-resistant Staphylococcus aureus (MRSA) osteomyelitis and prosthetic joint infection. The primary objectives were clinical outcomes and adverse events (AEs), and a secondary outcome described microbiological susceptibility. Fourteen patients were enrolled. Median duration of therapy was 58 days, and four patients had concurrent bacteremia. End-of-treatment outcomes were available in 78% of patients, with a clinical success rate of 91%...
December 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29134582/long-term-efficacy-of-comprehensive-multidisciplinary-antibiotic-stewardship-programs-centered-on-weekly-prospective-audit-and-feedback
#16
Takeshi Kimura, Atsushi Uda, Tomoyuki Sakaue, Kazuhiko Yamashita, Tatsuya Nishioka, Sho Nishimura, Kei Ebisawa, Manabu Nagata, Goh Ohji, Tatsuya Nakamura, Chihiro Koike, Mari Kusuki, Takeshi Ioroi, Akira Mukai, Yasuhisa Abe, Hiroyuki Yoshida, Midori Hirai, Soichi Arakawa, Ikuko Yano, Kentaro Iwata, Issei Tokimatsu
OBJECTIVE: To evaluate the long-term effects of comprehensive antibiotic stewardship programs (ASPs) on antibiotic use, antimicrobial-resistant bacteria, and clinical outcomes. DESIGN: Before-after study. SETTING: National university hospital with 934 beds. INTERVENTION: Implementation in March 2010 of a comprehensive ASPs including, among other strategies, weekly prospective audit and feedback with multidisciplinary collaboration...
November 13, 2017: Infection
https://www.readbyqxmd.com/read/29133561/outcomes-of-vancomycin-plus-a-%C3%AE-lactam-versus-vancomycin-only-for-the-treatment-of-methicillin-resistant-staphylococcus-aureus-bacteremia
#17
James Truong, John J Veillette, Steve C Forland
The objective of this retrospective study was to compare the rates of treatment failure, which was a composite of clinical and microbiologic failure, of patients receiving vancomycin and a β-lactam to those receiving vancomycin only for MRSA bacteremia. Patients 16 to 89 years of age with MRSA bacteremia admitted to a university-affiliated hospital from January 1(st), 2014 to December 31(st), 2016 were screened for study inclusion. Patients were eligible if they received >48 hours of vancomycin and a β-lactam (combination group) or vancomycin only (standard group) within 48 hours following bacteremia onset...
November 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29103153/humoral-immune-consequences-of-staphylococcus-aureus-st239-associated-bacteremia
#18
H Ghasemzadeh-Moghaddam, Wjb van Wamel, A van Belkum, R A Hamat, M Tavakol, V K Neela
The humoral immune responses against 46 different staphylococcal antigens in 27 bacteremia patients infected by clonally related methicillin-resistant Staphylococcus aureus (MRSA) strains of a single sequence type (ST) 239 were investigated. A group of non-infected patients (n = 31) hospitalized for different reasons served as controls. All strains were confirmed as ST 239 by S. aureus and mecA-specific PCR, spa, and multi-locus sequence typing (MLST). In each bacteremia patient, a unique pattern of S. aureus antigen-specific immune responses after infection was observed...
November 4, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29077854/investigation-of-a-cluster-of-sequence-type-22-methicillin-resistant-staphylococcus-aureus-transmission-in-a-community-setting
#19
Michelle S Toleman, Emmeline R Watkins, Tom Williams, Beth Blane, Belinda Sadler, Ewan M Harrison, Francesc Coll, Julian Parkhill, Bernadette Nazareth, Nicholas M Brown, Sharon J Peacock
Background: Whole-genome sequencing (WGS) has typically been used to confirm or refute hospital/ward outbreaks of methicillin-resistant Staphylococcus aureus (MRSA) identified through routine practice. However, appropriately targeted WGS strategies that identify routinely "undetectable" transmission remain the ultimate aim. Methods: WGS of MRSA isolates sent to a regional microbiological laboratory was performed as part of a 12-month prospective observational study...
October 25, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29065784/effect-of-vancomycin-initial-dosing-on-time-to-systemic-inflammatory-response-syndrome-resolution-in-patients-with-methicillin-resistant-staphylococcus-aureus-bacteremia
#20
Jessica Lynn Wesolek, Kelly McNorton, George Delgado, Christopher Alan Giuliano
Current guidelines suggest using vancomycin-loading doses for complicated infections despite a lack of evidence to support this practice. To address this gap, we performed a single-centre cohort study of 124 patients with sepsis due to methicillin-resistant Staphylococcus aureus bacteremia. Patients were allocated into two groups based on initial dose of vancomycin, <20 mg/kg or ≥20 mg/kg, and evaluated for time to resolution of systemic inflammatory response syndrome (SIRS). Among a cohort of 124 patients, 87 received vancomycin initial doses <20 mg/kg and 37 received ≥20 mg/kg...
October 25, 2017: Journal of Chemotherapy
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