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https://www.readbyqxmd.com/read/28900682/treatment-of-staphylococcus-aureus-infections
#1
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
#2
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
#3
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
#4
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...
August 28, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28843943/evaluation-of-contact-precautions-for-methicillin-resistant-staphylococcus-aureus-and-vancomycin-resistant-enterococcus
#5
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
https://www.readbyqxmd.com/read/28831593/impact-of-rapid-diagnosis-of-staphylococcus-aureus-bacteremia-from-positive-blood-cultures-on-patient-management
#6
M P Romero-Gómez, E Cendejas-Bueno, J García Rodriguez, J Mingorance
We have performed a retrospective, before-after comparison of turnaround time and therapy adjustment parameters before and after the introduction of matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) plus mecA polymerase chain reaction (PCR) for the identification of methicillin-resistant Staphylococcus aureus (MRSA) in positive blood cultures. There were 227 episodes of S. aureus bacteremia during the study periods. The pre-MALDI-TOF and post-MALDI-TOF groups included 133 and 94 patients, respectively...
August 23, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28818549/integration-of-dpc-and-clinical-microbiological-data-in-japan-reveals-importance-of-confirming-a-negative-follow-up-blood-culture-in-patients-with-mrsa-bacteremia
#7
Naoki Miyamoto, Koji Yahara, Rie Horita, Tomomi Yano, Naotaka Tashiro, Daiichi Morii, Atsuko Tsutsui, Kenichiro Yaita, Keigo Shibayama, Hiroshi Watanabe
Methicillin-resistant Staphylococcus aureus (MRSA) bacteremia is one of the commonest and most life-threatening of all infectious diseases. The morbidity and mortality rates associated with MRSA bacteremia are higher than those associated with bacteremia caused by other pathogens. A common guideline in MRSA bacteremia treatment is to confirm bacteremia clearance through additional blood cultures 2-4 days after initial positive cultures and as needed thereafter. However, no study has presented statistical evidence of how and to what extent confirming a negative follow-up blood culture impacts clinical outcome...
October 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28807042/incidence-prevalence-and-management-of-mrsa-bacteremia-across-patient-populations-a-review-of-recent-developments-in-mrsa-management-and-treatment
#8
REVIEW
Ali Hassoun, Peter K Linden, Bruce Friedman
Methicillin-resistant Staphylococcus aureus (MRSA) infection is still a major global healthcare problem. Of concern is S. aureus bacteremia, which exhibits high rates of morbidity and mortality and can cause metastatic or complicated infections such as infective endocarditis or sepsis. MRSA is responsible for most global S. aureus bacteremia cases, and compared with methicillin-sensitive S. aureus, MRSA infection is associated with poorer clinical outcomes. S. aureus virulence is affected by the unique combination of toxin and immune-modulatory gene products, which may differ by geographic location and healthcare- or community-associated acquisition...
August 14, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28760895/molecular-epidemiology-and-phylogenomics-of-staphylococcus-aureus-bacteremia-in-latin-america-a-prospective-cohort-multicenter-study-in-nine-countries
#9
Cesar A Arias, Jinnethe Reyes, Lina Paola Carvajal, Sandra Rincon, Lorena Diaz, Diana Panesso, Gabriel Ibarra, Rafael Rios, Jose M Munita, Mauro J Salles, Carlos Alvarez-Moreno, Jaime Labarca, Coralith Garcia, Carlos M Luna, Carlos Mejia-Villatoro, Jeannete Zurita, Manuel Guzman-Blanco, Eduardo Rodriguez-Noriega, Apurva Narechania, Laura J Rojas, Paul J Planet, George M Weinstock, Eduardo Gotuzzo, Carlos Seas
Staphylococcus aureus are important pathogens causing a spectrum of diseases ranging from mild skin and soft tissue infections to life-threatening conditions. Bloodstream infections are particularly important and the treatment approach is complicated by the presence of methicillin resistance among S. aureus isolates (MRSA). Emergence of new genetic lineages of MRSA has occurred in Latin America (LA) with the rise and dissemination of the community-associated USA300 Latin American Variant (USA300-LV). Here, we prospectively characterized bloodstream MRSA recovered from selected hospitals in 9 Latin American countries...
July 31, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28748772/epidemiology-and-hospital-readmission-associated-with-complications-of-staphylococcus-aureus-bacteremia-in-pediatrics-over-a-25-year-period
#10
J LE, Q Dam, T Tran, A Nguyen, F C Adler-Shohet, S Kim, K Schmidt, J M Lieberman, J S Bradley
We sought to comprehensively assess the prevalence and outcomes of complications associated with Staphylococcus aureus bacteremia (SAB) in children. Secondarily, prevalence of methicillin resistance and outcomes of complications from methicillin-resistant S. aureus (MRSA) vs. methicillin-susceptible S. aureus SAB were assessed. This is a single-center cross-sectional study of 376 patients ⩽18 years old with SAB in 1990-2014. Overall, 197 (52%) patients experienced complications, the most common being osteomyelitis (33%), skin and soft tissue infection (31%), and pneumonia (25%)...
September 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28719983/neonatal-lemierre-syndrome-youngest-reported-case-and-literature-review
#11
Blake S Raggio, Maria C Grant, Kimsey Rodriguez, Patrick J Cripe
A previously healthy 5-week-old female was admitted for sepsis secondary to methicillin-resistant Staphylococcus aureus (MRSA) bacteremia. After several days of hospitalization, she experienced acute decompensation in mental status despite having received targeted antibiotic therapy. Imaging revealed left peritonsillar/parapharyngeal space abscess, left venous thrombophlebitis of the internal jugular vein, and septic emboli of the lungs and brain consistent with Lemierre syndrome. Bedside needle aspiration of the parapharyngeal abscess confirmed MRSA involvement...
July 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28702467/ceftaroline-for-severe-methicillin-resistant-staphylococcus-aureus-infections-a-systematic-review
#12
REVIEW
Reese A Cosimi, Nahal Beik, David W Kubiak, Jennifer A Johnson
Ceftaroline is approved by the Food and Drug Administration for acute bacterial skin and skin-structure infections and community-acquired bacterial pneumonia, including cases with concurrent bacteremia. Use for serious methicillin-resistant Staphylococcus aureus (MRSA) infections has risen for a multitude of reasons. The aim of this article is to review the literature evaluating clinical outcomes and safety of ceftaroline prescribed for serious MRSA infections. We conducted a literature search in Ovid (Medline) and PubMed for reputable case reports, clinical trials, and reviews focusing on the use of ceftaroline for treatment of MRSA infections...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28639163/agr-functionality-affects-clinical-outcomes-in-patients-with-persistent-methicillin-resistant-staphylococcus-aureus-bacteraemia
#13
C K Kang, Y K Kim, S-I Jung, W B Park, K-H Song, K-H Park, P G Choe, H-C Jang, S Lee, Y-S Kim, Y G Kwak, K T Kwon, S Kiem, C-J Kim, E S Kim, H B Kim
Methicillin-resistant Staphylococcus aureus bacteremia (MRSAB) often persists despite appropriate antibiotic therapy. It is unclear what microbiological factors contribute to poor clinical outcomes in persistent MRSAB (pMRSAB). We aimed to identify clinical and microbiological risk factors for in-hospital mortality in pMRSAB. We analysed MRSAB cases prospectively collected between 2009 and 2016 at 11 hospitals in Korea, defining cases of pMRSAB as MRSAB lasting ≥5 days despite administration of effective antibiotics...
June 21, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28634536/telavancin-a-novel-semisynthetic-lipoglycopeptide-agent-to-counter-the-challenge-of-resistant-gram-positive-pathogens
#14
REVIEW
Biswadeep Das, Chayna Sarkar, Debasmita Das, Amit Gupta, Arnav Kalra, Shubham Sahni
Telavancin (TD-6424), a semisynthetic lipoglycopeptide vancomycin-derivative, is a novel antimicrobial agent developed by Theravance for overcoming resistant Gram-positive bacterial infections, specifically methicillin-resistant Staphylococcus aureus (MRSA). The US Food and Drug Administration (USFDA) had approved telavancin in 2009 for the treatment of complicated skin and skin structure infections (cSSSIs) caused by Gram-positive bacteria, including MRSA (S. aureus, Streptococcus agalactiae, Streptococcus pyogenes, Streptococcus anginosus group, or Enterococcus faecalis)...
March 2017: Therapeutic Advances in Infectious Disease
https://www.readbyqxmd.com/read/28632826/-pyogenic-liver-abscess-in-children-clinical-experience-in-a-pediatric-reference-center
#15
Carolina Carballo, Claudia Cazes, Mariana Matsuda, M Laura Praino, Noemí Rivas, Eduardo López
INTRODUCTION: Liver abscess is a serious and an uncommon pediatric disease. OBJECTIVE AND METHOD: Description of 20 pediatric patients with liver abscess admitted in "Ricardo Gutierrez" Children's Hospital, a Tertiary Reference Center of Buenos Aires, between 2009 and 2015. RESULTS: The hospitalization rate was 35/100.000 admissions. Median age was 5 years old, male/female ratio 4/1. Five patients (25%) had predisposing factors. Median days at diagnosis were 12...
April 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28626538/septic-thrombophlebitis-with-persistent-methicillin-resistant-staphylococcus-aureus-bacteremia-and-de-novo-resistance-to-vancomycin-and-daptomycin
#16
Yael Koton, Zafrir Or, Naiel Bisharat
Persistent methicillin-resistant Staphylococcus aureus (MRSA) bacteremia is associated with significant risk of mortality, especially when it occurs while on appropriate antimicrobial therapy. We herein describe an unusual case of a patient with prosthetic aortic tissue valve, who suffered from central venous catheter related MRSA bacteremia with septic thrombus formation in the superior vena cava. MRSA bacteremia persisted despite removal of the catheter and appropriate antimicrobial therapy including vancomycin, rifampin, and daptomycin...
May 31, 2017: Infectious Disease Reports
https://www.readbyqxmd.com/read/28589155/a-severe-case-of-cutaneous-adverse-drug-reaction-secondary-to-a-novice-drug-idelalisib
#17
Joseph Gabriel Gabriel, Aaysha Kapila, Alexei Gonzalez-Estrada
Phosphatidylinositol 3-kinase δ (PIK3δ) is a tyrosine kinase essential for B cell survival, making it an important target in the treatment of chronic lymphocytic leukemia. Idelalisib is an inhibitor of PIK3δ demonstrating initial success in disease response, but is now shown to have a decreased overall survival and life-threatening serious adverse events. The following is an unfortunate case of a grade III adverse skin reaction secondary to idelalisib with the likely complication of methicillin-resistant Staphylococcus aureus bacteremia...
April 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28584141/multimechanistic-monoclonal-antibodies-mabs-targeting-staphylococcus-aureus-alpha-toxin-and-clumping-factor-a-activity-and-efficacy-comparisons-of-a-mab-combination-and-an-engineered-bispecific-antibody-approach
#18
C Tkaczyk, S Kasturirangan, A Minola, O Jones-Nelson, V Gunter, Y Y Shi, K Rosenthal, V Aleti, E Semenova, P Warrener, D Tabor, C K Stover, D Corti, G Rainey, B R Sellman
Secreted alpha-toxin and surface-localized clumping factor A (ClfA) are key virulence determinants in Staphylococcus aureus bloodstream infections. We previously demonstrated that prophylaxis with a multimechanistic monoclonal antibody (MAb) combination against alpha-toxin (MEDI4893*) and ClfA (11H10) provided greater strain coverage and improved efficacy in an S. aureus lethal bacteremia model. Subsequently, 11H10 was found to exhibit reduced affinity and impaired inhibition of fibrinogen binding to ClfA002 expressed by members of a predominant hospital-associated methicillin-resistant S...
August 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28575112/molecular-epidemiology-of-staphylococcus-aureus-bacteremia-in-a-single-large-minnesota-medical-center-in-2015-as-assessed-using-mlst-core-genome-mlst-and-spa-typing
#19
Kyung-Hwa Park, Kerryl E Greenwood-Quaintance, James R Uhl, Scott A Cunningham, Nicholas Chia, Patricio R Jeraldo, Priya Sampathkumar, Heidi Nelson, Robin Patel
Staphylococcus aureus is a leading cause of bacteremia in hospitalized patients. Whether or not S. aureus bacteremia (SAB) is associated with clonality, implicating potential nosocomial transmission, has not, however, been investigated. Herein, we examined the epidemiology of SAB using whole genome sequencing (WGS). 152 SAB isolates collected over the course of 2015 at a single large Minnesota medical center were studied. Staphylococcus protein A (spa) typing was performed by PCR/Sanger sequencing; multilocus sequence typing (MLST) and core genome MLST (cgMLST) were determined by WGS...
2017: PloS One
https://www.readbyqxmd.com/read/28572795/cephalosporin-glycopeptide-combinations-for-use-against-clinical-methicillin-resistant-staphylococcus-aureus-isolates-enhanced-in-vitro-antibacterial-activity
#20
Hung-Jen Tang, Chih-Cheng Lai, Chi-Chung Chen, Chun-Cheng Zhang, Tzu-Chieh Weng, Wen-Liang Yu, Hung-Jui Chen, Yu-Hsin Chiu, Wen-Chien Ko, Yin-Ching Chuang
The empirical combination of both a beta-lactam and glycopeptide to counter potential staphylococcal pathogens may improve the clinical outcomes for cases of Staphylococcus aureus bacteremia. We reported comparative in vitro studies of combination effects of different cephalosporins (i.e., cefazolin, cefmetazole, cefotaxime, and cefepime) combined with glycopeptides for 34 randomly selected methicillin-resistant S. aureus (MRSA) isolates by three methods, including the checkerboard, time-killing, and combination MIC measurement methods...
2017: Frontiers in Microbiology
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