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mrsa and bacteremia

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/29038267/a-retrospective-analysis-of-treatment-and-clinical-outcomes-among-patients-with-methicillin-susceptible-staphylococcus-aureus-bloodstream-isolates-possessing-detectable-meca-by-a-commercial-pcr-assay-compared-to-patients-with-methicillin-resistant-staphylococcus
#10
Dylan Jones, Ramy H Elshaboury, Erik Munson, Thomas J Dilworth
mecA-positive Staphylococcus aureus isolates phenotypically susceptible to cefoxitin (mecA-MSSA) have been identified. We describe treatment and outcomes among patients with mecA-MSSA bloodstream infections (BSI) and MRSA BSI patients matched 1:1 on age, BSI origin and BSI type (n=17 per group). Compared to MRSA BSI patients, mecA-MSSA BSI patients more often experienced clinical failure (58.8% and 11.8%, p=0.010), driven largely by persistent bacteremia (35.3% and 11.8%). mecA-MSSA BSI patients may be at higher risk for poor clinical outcomes...
October 16, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28992126/association-between-vancomycin-trough-concentrations-and-duration-of-methicillin-resistant-staphylococcus-aureus-bacteremia-in-children
#11
Alice J Hsu, Rana F Hamdy, Yanjie Huang, Jared A Olson, Shahira Ghobrial, Jeffrey S Gerber, Adam L Hersh, Pranita D Tamma
In a multicenter retrospective study, we sought to determine the optimal vancomycin trough concentration that would impact the duration of methicillin-resistant Staphylococcus aureus bacteremia in children. We found that a median vancomycin trough concentration of <10 µg/mL within the first 72 hours may be associated with a longer duration of bacteremia compared to a median trough concentration of ≥10 µg/mL.
September 14, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28954388/pretreatment-of-pam3csk4-attenuates-inflammatory-responses-caused-by-systemic-infection-of-methicillin-resistant-staphylococcus-aureus-in-mice
#12
Zhaoxia Huang, Xiayu Yi, Yiguo Chen, Xiaorui Hou, Xiangyu Wang, Ping Zhu, Kangmin Zhao, Shuangshuang Wu, Ning Fu, Beiyi Liu
Pam3CSK4 is a synthetic tripalmitoylated lipopeptide that acts as a ligand of TLR1/TLR2 by mimicking the acetylated amino terminus of bacterial lipoproteins. Here we found that pretreatment of Pam3CSK4 protected mice from systemic infection of methicillin-resistant Staphylococcus aureus (MRSA), and enhanced the bacterial clearance in bacteremia model. Pro-inflammatory cytokines, such as TNF-α, IL-6, MCP-1 and IFN-γ were significantly decreased in serum from Pam3CSK4-treated mice. Besides, upon PamCSK4 treatment, the TLR2 expression was down-regulated, IRAK1 phosphorylation was inhibited, and the expression of IRAK-M and Tollip, two negative regulators of NF-κB pathway, was up-regulated...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28949410/early-administration-of-adjuvant-%C3%AE-lactam-therapy-in-combination-with-vancomycin-among-patients-with-methicillin-resistant-staphylococcus-aureus-bloodstream-infection-a-retrospective-multicenter-analysis
#13
Anthony M Casapao, David M Jacobs, Dana R Bowers, Nicholas D Beyda, Thomas J Dilworth
STUDY OBJECTIVE: To determine whether early administration of adjuvant β-lactam in combination with vancomycin (COMBO) affects clinical outcomes compared to standard vancomycin therapy alone (STAN) among patients with methicillin-resistant Staphylococcus aureus (MRSA) bloodstream infection. DESIGN: Retrospective, multicenter cohort study. SETTING: Five academic or community hospitals throughout the United States. PATIENTS: Adults with MRSA bloodstream infections treated with vancomycin (≥ 72 hrs) with or without an intravenous β-lactam (≥ 48 hrs) initiated within 24 hours of initiating vancomycin...
November 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28943633/vancomycin-induced-leukocytoclastic-vasculitis-and-acute-renal-failure-due-to-tubulointerstitial-nephritis
#14
Chandra Shekar Pingili, Emmanuel E Okon
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and sepsis are commonly treated with intravenous vancomycin. However, vancomycin treatment is associated adverse reactions, including skin rashes and nephrotoxicity. We present a case of acute renal failure due to acute tubulointerstitial nephritis associated with a diffuse leukocytoclastic vasculitic skin eruption following intravenous vancomycin treatment. CASE REPORT A 79-year-old Caucasian male patient was treated with intravenous vancomycin for MRSA bacteremia...
September 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28923864/age-related-trends-in-adults-with-community-onset-bacteremia
#15
Ching-Chi Lee, Jiun-Ling Wang, Chung-Hsun Lee, Yuan-Pin Hung, Ming-Yuan Hong, Chia-Ming Chang, Wen-Chien Ko
To understand the epidemiological variation in bacteremia characteristics among differently aged populations, adults with community-onset bacteremia during a 6-year period were studied in a retrospective cohort. A total of 2,349 bacteremic patients were stratified into four age categories: young adults (18-44 years old; 196 patients, 8.3%), adults (45-64; 707, 30.1%), the elderly (65-84; 1,098, 46.7%), and the oldest old (≥ 85; 348, 14.8%). Age-related trends in critical illness (a Pitt bacteremia score ≥ 4) at bacteremia onset, antibiotic-resistant pathogens (ESBL-producing Escherichia coli, Klebsiella species, and Proteus mirabilis [EKP]; methicillin-resistant Staphylococcus aureus [MRSA]; and levofloxacin non-susceptible EKP), inappropriate empirical antibiotic therapy (EAT), and 4-week mortality rate were observed...
September 18, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28900682/treatment-of-staphylococcus-aureus-infections
#16
Michael Z David, Robert S Daum
Staphylococcus aureus, although generally identified as a commensal, is also a common cause of human bacterial infections, including of the skin and other soft tissues, bones, bloodstream, and respiratory tract. The history of S. aureus treatment is marked by the development of resistance to each new class of antistaphylococcal antimicrobial drugs, including the penicillins, sulfonamides, tetracyclines, glycopeptides, and others, complicating therapy. S. aureus isolates identified in the 1960s were sometimes resistant to methicillin, a ß-lactam antimicrobial active initially against a majority S...
September 13, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28878584/healthy-adolescent-with-a-mycotic-aortic-aneurysm-from-community-acquired-methicillin-resistant-staphylococcus-aureus
#17
Durga P Naidu, Jose A Quinones, Kenneth W Lutschg, Duraisamy Balaguru
Mycotic aneurysm after bacteremia is a rare diagnosis in children and adolescents. We report the case of a previously healthy adolescent who presented with chest pain and fever and who developed a mycotic aneurysm of the aorta after contracting community-acquired, methicillin-resistant Staphylococcus aureus. Early recognition of widening of the patient's superior mediastinum, noted during a comparison of the patient's initial and follow-up chest radiographs, prompted computed tomographic angiography of the chest and led to a timely diagnosis, rapid surgical intervention, and a good clinical outcome...
August 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28859468/clinical-and-microbiological-factors-associated-with-early-patient-mortality-from-methicillin-resistant-staphylococcus-aureus-bacteremia
#18
Tark Kim, Yong Pil Chong, Ki-Ho Park, Kyung Mi Bang, Su-Jin Park, Sung-Han Kim, Jin-Yong Jeong, Sang-Oh Lee, Sang-Ho Choi, Jun Hee Woo, Yang Soo Kim
Background/Aims: Methicillin-resistant Staphylococcus aureus bacteremia (MRSAB) is a major bloodstream infection with a high mortality rate. Identification of factors associated with early mortality in MRSAB patients would be useful for predicting prognosis and developing new therapeutic options. Methods: A prospective cohort of MRSAB patients was examined between August 2008 and June 2011. Early and late mortality was defined as death within 2 and 28 days of blood culture, respectively...
July 6, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28858628/a-novel-recombinant-vaccine-candidate-comprising-pbp2a-and-autolysin-against-methicillin-resistant-staphylococcus-aureus-confers-protection-in-the-experimental-mice
#19
Setareh Haghighat, Seyed Davar Siadat, Seyed Mehdi Rezayat Sorkhabadi, Abbas Akhavan Sepahi, Mehdi Mahdavi
The methicillin-resistant Staphylococcus aureus infection is a hot topic area in microbiology research. Here a novel vaccine candidate consisting of recombinant PBP2a and autolysin proteins were used. The proteins over expressed in E.coli BL21 (DE3) cells, and purified by the Ni-NTA affinity column and conjugated using EDAC and ADH as a linker and spacer, respectively. To investigate the immunogenicity and protective effects of recombinant proteins, 5 and 20μg of proteins in various formulations were subcutaneously injected in different groups...
November 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28843943/evaluation-of-contact-precautions-for-methicillin-resistant-staphylococcus-aureus-and-vancomycin-resistant-enterococcus
#20
Ana Cecilia Bardossy, Muhammad Yasser Alsafadi, Patricia Starr, Eman Chami, Jennifer Pietsch, Daniela Moreno, Laura Johnson, George Alangaden, Marcus Zervos, Katherine Reyes
BACKGROUND: There are limited controlled data demonstrating contact precautions (CPs) prevent methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus (VRE) infections in endemic settings. We evaluated changes in hospital-acquired MRSA and VRE infections after discontinuing CPs for these organisms. METHODS: This is a retrospective study done at an 800-bed teaching hospital in urban Detroit. CPs for MRSA and VRE were discontinued hospital-wide in 2013...
August 23, 2017: American Journal of Infection Control
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