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https://www.readbyqxmd.com/read/28430673/antimicrobial-resistant-streptococcus-pneumoniae-prevalence-mechanisms-and-clinical-implications
#1
Regine Cherazard, Marcia Epstein, Thien-Ly Doan, Tanzila Salim, Sheena Bharti, Miriam A Smith
BACKGROUND: Streptococcus pneumoniae is a major cause of pneumonia, meningitis, sepsis, bacteremia, and otitis media. S. pneumoniae has developed increased resistance to multiple classes of antibiotics. STUDY DESIGN: Systematic literature review of prevalence, mechanisms, and clinical implications in S. pneumoniae resistance. AREAS OF UNCERTAINTY: Since S. pneumoniae resistance to penicillin was first reported with subsequent development of resistance to other classes of drugs, selection of appropriate antibiotic treatment is challenging...
April 19, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/28426231/the-prevalence-of-integrons-as-the-carrier-of-antibiotic-resistance-genes-in-natural-and-man-made-environments
#2
Liping Ma, An-Dong Li, Xiao-Le Yin, Tong Zhang
Class 1 integrase intI1 has been considered as a good proxy for anthropogenic pollution because of being linked to genes conferring resistance to antibiotics. The gene cassettes of class 1 integrons could carry diverse antibiotic resistance genes (ARGs) and conduct horizontal gene transfer among microorganisms. The present study applied high-throughput sequencing technique combined with an intI1 database and genome assembly to quantify the abundance of intI1 in 64 environmental samples from 8 ecosystems, and to investigate the diverse arrangements of ARG-carrying gene cassettes (ACGCs) carried by class 1 integrons...
April 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28421415/a-tyrosine-residue-along-with-a-glutamic-acid-of-the-omega-like-loop-governs-the-beta-lactamase-activity-of-msmeg_4455-in-mycobacterium-smegmatis
#3
Ankita Bansal, Debasish Kar, Satya Deo Pandey, Ashok Matcha, N Ganesh Kumar, Soshina Nathan, Anindya S Ghosh
Mycobacterial beta-lactamases are involved in exerting beta-lactam resistance, though many of these proteins remain uncharacterized. Here, we have characterized MSMEG_4455 of Mycobacterium smegmatis as a beta-lactamase using molecular, biochemical and mutational techniques. To elucidate its nature in vivo and in vitro, and to predict its structure-function relationship in silico analysis is done. The MSMEG_4455 is cloned and expressed ectopically in a beta-lactamase deficient Escherichia coli mutant to establish the in vivo beta-lactamase like nature via minimum inhibitory concentration (MIC) determination...
April 19, 2017: Protein Journal
https://www.readbyqxmd.com/read/28397940/phenotypic-and-molecular-study-of-pneumococci-causing-respiratory-tract-infections-a-3-year-prospective-cohort
#4
Amani M Alnimr, Maha Farhat
To study serotype distribution and antimicrobial resistance to beta-lactams and macrolides in pneumococci causing respiratory diseases after the introduction of the 13-valent pneumococcal conjugate vaccine in Saudi Arabia. Methods: This is a hospital-based and a cross-sectional prospective surveillance study conducted at King Fahad Hospital of the University, AlKhobar, Kingdom  of Saudi Arabia, in which respiratory pneumococcal isolates collected between 2012 and 2014 were serotyped by multiplex sequential polymerase chain reaction (PCR) and Pneumotest-Latex...
April 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28397262/extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-and-klebsiella-pneumoniae-critical-tools-for-antibiotic-resistance-pattern
#5
REVIEW
Nagarajan Padmini, Antony Alex Kennedy Ajilda, Natesan Sivakumar, Gopal Selvakumar
Drug resistance is a phenomenon where by an organism becomes fully or partially resistant to drugs or antibiotics being used against it. Antibiotic resistance poses an exacting intimidation for people with underlying medical immune conditions or weakened immune systems. Infections caused by the enzyme extended spectrum β-lactamase (ESBL) producing multi drug resistance (MDR) Enterobacteriaceae especially Escherichia coli and Klebsiella pneumoniae are resistant to a broad range of beta lactams, including third generation cephalosporins...
April 11, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28394796/reply-to-letter-glycopeptides-versus-beta-lactams-for-the-prevention-of-surgical-site-infections-in-cardiovascular-and-orthopedic-surgery-a-meta-analysis
#6
Anas Saleh, Alison K Klika, Wael K Barsoum
No abstract text is available yet for this article.
May 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28394795/glycopeptides-versus-beta-lactams-for-the-prevention-of-surgical-site-infections-in-cardiovascular-and-orthopedic-surgery-a-meta-analysis
#7
E Patchen Dellinger
No abstract text is available yet for this article.
May 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28384093/antimicrobial-susceptibility-monitoring-of-bacterial-pathogens-isolated-from-urinary-tract-infections-in-dogs-and-cats-across-europe-compath-results
#8
Hilde Moyaert, Ian Morrissey, Anno de Jong, Farid El Garch, Ulrich Klein, Carolin Ludwig, Julien Thiry, Myriam Youala
ComPath is a pan-European antimicrobial surveillance program collecting bacterial pathogens from dogs and cats not recently exposed to antimicrobials. We present minimum inhibitory concentration data obtained using Clinical and Laboratory Standards Institute methodology for 616 urinary tract infection (UTI) isolates collected between 2008 and 2010. In both dogs and cats, the most common pathogen was Escherichia coli (59.8% and 46.7%, respectively). Antimicrobial activity against E. coli in dogs and cats was similar with fluoroquinolone and trimethoprim/sulfamethoxazole susceptibility >90%...
April 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28382604/non-immediate-cutaneous-reactions-to-beta-lactams-approach-to-diagnosis
#9
REVIEW
Antonino Romano, Rocco Luigi Valluzzi, Cristiano Caruso, Michela Maggioletti, Francesco Gaeta
Non-immediate cutaneous reactions (i.e., occurring at least 1 h after the initial drug administration), particularly maculopapular exanthemas and urticarial eruptions, are common during beta-lactam treatments. A T cell-mediated pathogenic mechanism has been demonstrated in some cutaneous reactions, such as maculopapular exanthema, fixed drug eruption, acute generalized exanthematous pustulosis, and drug-induced hypersensitivity syndrome. In the diagnostic work-up, patch testing is useful, together with delayed-reading intradermal testing...
April 2017: Current Allergy and Asthma Reports
https://www.readbyqxmd.com/read/28379314/comparative-effectiveness-of-cefazolin-versus-nafcillin-or-oxacillin-for-treatment-of-methicillin-susceptible-staphylococcus-aureus-infections-complicated-by-bacteremia-a-nationwide-cohort-study
#10
Jennifer S McDanel, Mary-Claire Roghmann, Eli N Perencevich, Michael E Ohl, Michihiko Goto, Daniel J Livorsi, Makoto Jones, Justin P Albertson, Rajeshwari Nair, Amy M J O'Shea, Marin L Schweizer
Background: To treat patients with methicillin-susceptible S. aureus (MSSA) infections, beta-lactams are recommended for definitive therapy; however the comparative effectiveness of individual beta-lactams is unknown. This study compared definitive therapy with cefazolin versus nafcillin or oxacillin among patients with MSSA infections complicated by bacteremia. Methods: This retrospective study included patients admitted to 119 Veterans Administration hospitals from 2003 to 2010...
March 31, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28378243/prolonged-suppressive-antibiotic-therapy-for-prosthetic-joint-infection-in-the-elderly-a-national-multicentre-cohort-study
#11
V Prendki, T Ferry, P Sergent, E Oziol, E Forestier, T Fraisse, S Tounes, S Ansart, J Gaillat, S Bayle, O Ruyer, F Borlot, G Le Falher, B Simorre, F-A Dauchy, S Greffe, T Bauer, E N Bell, B Martha, M Martinot, M Froidure, M Buisson, A Waldner, X Lemaire, A Bosseray, M Maillet, V Charvet, A Barrelet, B Wyplosz, M Noaillon, E Denes, E Beretti, M Berlioz-Thibal, V Meyssonnier, E Fourniols, L Tliba, A Eden, M Jean, C Arvieux, K Guignery-Kadri, C Ronde-Oustau, Y Hansmann, A Belkacem, F Bouchand, G Gavazzi, F Herrmann, J Stirnemann, A Dinh
During prosthetic joint infection (PJI), optimal surgical management with exchange of the device is sometimes impossible, especially in the elderly population. Thus, prolonged suppressive antibiotic therapy (PSAT) is the only option to prevent acute sepsis, but little is known about this strategy. We aimed to describe the characteristics, outcome and tolerance of PSAT in elderly patients with PJI. We performed a national cross-sectional cohort study of patients >75 years old and treated with PSAT for PJI...
April 4, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28378151/-antibiotic-stewardship-and-staphylococcus-aureus-bacteremia
#12
S Weis, A Kimmig, S Hagel, M W Pletz
Rates of antibiotic resistance are increasing worldwide and impact on the treatment of patients with bacterial infections. A broad and uncritical application in inpatient and outpatient settings as well as in agriculture has been recognized as the main driving force. Antibiotic stewardship (ABS) programs aim at countering this worrisome development using various direct interventions such as infectious disease counseling. Blood stream infections caused by Staphylococcus (S.) aureus are severe infections associated with high mortality rates...
April 4, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28377312/comparison-of-antipseudomonal-beta-lactams-for-febrile-neutropenia-empiric-therapy-systematic-review-and-network-meta-analysis
#13
REVIEW
Nobuyuki Horita, Yuji Shibata, Hiroki Watanabe, Ho Namkoong, Takeshi Kaneko
OBJECTIVES: Compare the effectiveness and safety of antipseudomonal beta-lactam empiric monotherapy for febrile neutropenia by network meta-analysis. METHODS: The searches using Pubmed, Cochrane CENTRAL, EMBASE, and Web of Science Core Collection were carried out in June 2016. English articles, non-English articles, full-length articles, short articles, and conference abstracts were allowed. Eligible trial design was a parallel-group individual randomization. We included febrile neutropenia adult and pediatric patients undergoing chemotherapy for either solid tumors or hematological malignanciesand treated with intravenous antipseudomonal beta-lactams for initial empiric therapy...
April 1, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28369204/prediction-of-bloodstream-infection-due-to-vancomycin-resistant-enterococci-in-patients-undergoing-leukemia-induction-or-hematopoietic-stem-cell-transplantation
#14
Brandon J Webb, Regan Healy, Jacob Majers, Zachary Burr, Michaela Gazdik, Bert Lopansri, Daanish Hoda, Finn Bo Petersen, Clyde Ford
Background.: Bloodstream infection (BSI) due vancomycin-resistant Enterococcus (VRE) is an important complication of hematologic malignancy. Determining when to use empiric anti-VRE antibiotic therapy in this population remains a clinical challenge. Methods.: A single-center cohort representing 664 admissions for induction or hematopoietic stem cell transplant (HSCT) from 2006-2014 was selected. We derived a prediction score using risk factors for VRE BSI and evaluated the model's predictive performance by calculating it for each of 16,232 BSI at-risk inpatient days...
March 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28366610/increased-risk-of-death-with-recurrent-pseudomonas-aeruginosa-bacteremia
#15
K L McCarthy, D L Paterson
This study aimed to characterize recurrent Pseudomonas aeruginosa blood stream infection (BSI). Positive blood cultures for P. aeruginosa were identified over a 3-year period from seven tertiary care hospitals. Patients with recurrent BSI were identified. Extensive epidemiological, clinical and outcome data were obtained. BSI recurrence was found to be uncommon with 9% of patients having a first relapse of BSI. Fourteen percent of these patients went on to have a second relapse of BSI. Significant variables associated with recurrence were the presence of a hematological malignancy or receiving recent corticosteroid therapy...
March 7, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28351916/identification-of-mupp-as-a-new-peptidoglycan-recycling-factor-and-antibiotic-resistance-determinant-in-pseudomonas-aeruginosa
#16
Coralie Fumeaux, Thomas G Bernhardt
Peptidoglycan (PG) is an essential cross-linked polymer that surrounds most bacterial cells to prevent osmotic rupture of the cytoplasmic membrane. Its synthesis relies on penicillin-binding proteins, the targets of beta-lactam antibiotics. Many Gram-negative bacteria, including the opportunistic pathogen Pseudomonas aeruginosa, are resistant to beta-lactams because of a chromosomally encoded beta-lactamase called AmpC. In P. aeruginosa, expression of the ampC gene is tightly regulated and its induction is linked to cell wall stress...
March 28, 2017: MBio
https://www.readbyqxmd.com/read/28351808/troubled-water-under-the-bridge-screening-of-river-mur-water-reveals-dominance-of-ctx-m-harboring-escherichia-coli-and-for-the-first-time-an-environmental-vim-1-producer-in-austria
#17
Gernot Zarfel, Michaela Lipp, Elena Gürtl, Bettina Folli, Rita Baumert, Clemens Kittinger
Antibiotic resistant bacteria (ARB) in the aquatic environment are reported from all over the world and their presence in the environment has become quite common. The current most prominent example is the presence of beta-lactamases harboring Enterobacteriaceae. The aim of this study was to investigate the presence and diversity (on the genetic and phenotypic levels) of extended spectrum beta-lactamases (ESBL) and carbapenemases harboring Enterobacteriaceae from the River Mur in the center of Graz, Austria's second largest city...
March 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28341979/are-third-generation-cephalosporins-unavoidable-for-empirical-therapy-of-community-acquired-pneumonia-in-adult-patients-who-require-icu-admission-a-retrospective-study
#18
Geoffroy Hariri, Jacques Tankovic, Pierre-Yves Boëlle, Vincent Dubée, Guillaume Leblanc, Claire Pichereau, Simon Bourcier, Naike Bigé, Jean-Luc Baudel, Arnaud Galbois, Hafid Ait-Oufella, Eric Maury
BACKGROUND: Third-generation cephalosporins (3GCs) are recommended for empirical antibiotic therapy of community-acquired pneumonia (CAP) in patients requiring ICU admission. However, their extensive use could promote the emergence of extended-spectrum beta-lactamases-producing Enterobacteriaceae. Our aim was to assess whether the use of 3GCs in patients with CAP requiring ICU admission was justified. METHODS: We assessed all patients with CAP who required ICU admission during a 7-year period...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28338347/ceftazidime-avibactam-novel-antimicrobial-combination-for-the-treatment-of-complicated-urinary-tract-infections
#19
Jakhongir F Alidjanov, Moritz Fritzenwanker, Ivan Hoffman, Florian M Wagenlehner
Ceftazidime-avibactam is a combination of a third-generation cephalosporin and a novel non-beta-lactam beta-lactamase inhibitor. This combination was recently recommended for the treatment of complicated urinary tract infections, including acute pyelonephritis, in adults with limited or no alternative treatment options. The current review is aimed to determine activity, efficacy and safety of ceftazidime-avibactam in the treatment of patients with complicated urinary tract infections.
March 24, 2017: Future Microbiology
https://www.readbyqxmd.com/read/28336384/predictors-for-individual-patient-antibiotic-treatment-effect-in-hospitalised-community-acquired-pneumonia-patients
#20
Antonella F Simonetti, Cornelis H van Werkhoven, Valentijn A Schweitzer, Diego Viasus, Jordi Carratalà, Douwe F Postma, Jan Jelrik Oosterheert, Marc J M Bonten
OBJECTIVE: Our objective was to identify clinical predictors of antibiotic treatment effects in non-ICU hospitalised CAP patients. METHODS: Post-hoc analysis of three prospective cohorts (from the Netherlands and Spain) of CAP adult patients admitted to a non-ICU having received either beta-lactam monotherapy (BL), beta-lactam + macrolide (BLM), or fluoroquinolone-based therapy (FQL) as empiric antibiotic treatment. We evaluated candidate clinical predictors of treatment effects in multiple mixed-effects models by including interactions of the predictors with empiric antibiotic choice and using 30-day mortality, ICU admission, and length of hospital stay (LOS) as outcomes...
March 20, 2017: Clinical Microbiology and Infection
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