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https://www.readbyqxmd.com/read/29775685/phenotypic-and-genetic-resistance-traits-in-pseudomonas-aeruginosa-strains-infecting-cystic-fibrosis-patients-a-french-cohort-study
#1
Nathalie Courtois, Yvan Caspar, Max Maurin
Pseudomonas aeruginosa is responsible for chronic respiratory tract colonisation and acute exacerbations in cystic fibrosis (CF) patients. This Gram-negative bacterium often develops multidrug resistance, which represents a therapeutic challenge. Our objective was to characterize the phenotypic and genetic β-lactam resistance traits of P. aeruginosa strains isolated from CF patients followed at Grenoble Alpes university hospital. The susceptibility to β-lactam compounds of 123 P. aeruginosa strains collected from the lower respiratory tract of 45 CF patients, between 2010 and 2014, was evaluated...
May 15, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29774212/alkaline-peptone-water-based-enrichment-method-for-mcr-3-from-acute-diarrheic-outpatient-gut-samples
#2
Qiaoling Sun, Yanyan Hu, Hongwei Zhou, Lingbin Shu, Hanyu Wang, Zixian Huang, Rong Zhang
A third plasmid-mediated colistin resistance gene, mcr-3 , is increasingly being reported in Enterobacteriaceae and Aeromonas spp. from animals and humans. To investigate the molecular epidemiology of mcr in the gut flora of Chinese outpatients, 152 stool specimens were randomly collected from outpatients in our hospital from May to June, 2017. Stool specimens enriched in alkaline peptone water or Luria-Bertani (LB) broth were screened for mcr-1, mcr-2 , and mcr-3 using polymerase chain reaction (PCR)-based assays...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29772393/unexpected-mechanisms-of-resistance-in-dutch-pseudomonas-aeruginosa-isolates-collected-during-fourteen-years-of-surveillance
#3
P D Croughs, C H W Klaassen, J van Rosmalen, D M Maghdid, S A Boers, J P Hays, W H F Goessens
Pseudomonas aeruginosa is one of the most important causes of infection in the intensive care unit. It is intrinsically resistant to many antibiotics and easily acquires additional resistance genes via horizontal gene transfer of mobile genetic elements. In the present study, 1,528 P. aeruginosa isolates, obtained from a Dutch national surveillance program between the years 1998 and 2011, were analyzed for the presence of Extended Spectrum β-Lactamase (ESBL) genes blaCTX-M , blaSHV , blaTEM , blaBEL , blaPER , blaVEB , blaOXA-10 and metallo-β-Lactamase (MBL) genes blaIMP , blaVIM and blaNDM ...
May 14, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29770214/case-report-haemolytic-anaemia-with-ceftazidime-use-in-a-patient-with-cystic-fibrosis
#4
Jun Yong, Freddy Frost, Dilip Nazareth, Martin Walshaw
Drug-induced Immune Haemolytic Anaemia (DIIHA) is a rare but serious complication of cephalosporin use. Ceftazidime is recognized to be a rare cause of DIIHA. We report and discuss a case of DIIHA in a person with cystic fibrosis who developed severe haemolytic anaemia following use of ceftazidime in the management of an acute pseudomonal pulmonary exacerbation.
2018: F1000Research
https://www.readbyqxmd.com/read/29760136/aztreonam-avibactam-combination-restores-susceptibility-of-aztreonam-in-dual-carbapenemase-producing-enterobacteriaceae
#5
Ka Lip Chew, Michelle K L Tay, Bernadette Cheng, Raymond T P Lin, Sophie Octavia, Jeanette W P Teo
Newly approved Food and Drug Administration (FDA) β-lactam-β-lactamase inhibitor (βL-βLI) inhibitor combinations such as ceftazidime-avibactam and meropenem-vaborbactam are potent inhibitors of class A carbapenemase (typified by KPC [ Klebsiella pneumoniae carbapenemase]-like) (1, 2) but are ineffective against carbapenemase-producing Enterobacteriaceae (CPE) producing class B metallo-β-lactamases (MβLs) such as New Delhi metallo-β-lactamase (NDM) (1-4).….
May 14, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29760124/-in-vitro-activity-of-ceftazidime-avibactam-against-clinical-isolates-of-enterobacteriaceae-and-pseudomonas-aeruginosa-collected-in-asia-pacific-countries-results-from-the-inform-global-surveillance-program-2012-2015
#6
James A Karlowsky, Krystyna M Kazmierczak, Samuel K Bouchillon, Boudewijn L M de Jonge, Gregory G Stone, Daniel F Sahm
The in vitro activities of ceftazidime-avibactam and comparators were determined for 9,149 isolates of Enterobacteriaceae and 2,038 isolates of Pseudomonas aeruginosa collected by 42 medical centers in nine countries in the Asia-Pacific region from 2012 to 2015 as part of the International Network For Optimal Resistance Monitoring (INFORM) global surveillance program. Antimicrobial susceptibility testing was conducted by CLSI broth microdilution and isolate subset analysis performed based on resistant phenotypes and β-lactamase content...
May 14, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29753132/prevention-of-eskape-pathogen-biofilm-formation-by-antimicrobial-peptides-wlbu2-and-ll37
#7
Qiao Lin, Berthony Deslouches, Ronald C Montelaro, Y Peter Di
OBJECTIVES: Bacterial biofilm-dependent infections (e.g., cystic fibrosis, surgical sites, and medical implants) are associated with enhanced drug-resistance and thus difficult to eradicate. The goal of this study was to systematically compare three distinct classes of antimicrobial peptides (AMPs) that include the clinically used antibiotic colistin, the natural AMP LL37, the engineered cationic-AMP WLBU2, and four commonly used antibiotics with different bactericidal mechanisms (tobramycin, ciprofloxacin, ceftazidime and vancomycin) for biofilm prevention properties...
May 9, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29751417/occurrence-and-characteristics-of-extended-spectrum-%C3%AE-lactamase-and-carbapenemase-producing-bacteria-from-hospital-effluents-in-singapore
#8
Laurence Haller, Hongjie Chen, Charmaine Ng, Thai Hoang Le, Tse Hsien Koh, Timothy Barkham, Mark Sobsey, Karina Yew-Hoong Gin
One of the most important resistance mechanisms in Gram-negative bacteria today is the production of enzymes causing resistance to cephalosporin and carbapenem antibiotics. The spread of extended-spectrum β-lactamases (ESBL)- and carbapenemase- producing Gram-negative bacteria is an emerging global public health problem. The aim of the present study was to (i) assess the prevalence of carbapenem-resistant bacteria (CRB) and ESBL-producing strains in sewage effluents from two major hospitals in Singapore, (ii) characterize the isolated strains and (iii) identify some of the ESBL and carbapenemase genes responsible for the resistance...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29751023/invasive-device-associated-infections-caused-by-pseudomonas-aeruginosa-in-critically-ill-patients-evolution-over-10-years
#9
Francisco Álvarez-Lerma, Pedro Olaechea-Astigarraga, Mercedes Palomar-Martínez, Mercedes Catalan, Xavier Nuvials, Ricardo Gimeno, María Pilar Gracia Arnillas, Iratxe Seijas Betolaza
We assessed invasive device-associated infections caused by Pseudomonas aeruginosa over 10 years (2007-2016) based on data from the ENVIN-HELICS registry (200 Spanish ICUs). P. aeruginosa was the leading pathogen except in the last two years in which there was a slight decrease, with Escherichia coli as the leading etiology. The rate of infections caused by P. aeruginosa remained between 12.0% and 14.6% throughout the study period. There was a significant increase of isolates resistant to imipenem, meropenem, ceftazidime, cefepime and piperacillin-tazobactam...
May 8, 2018: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29746711/a-monte-carlo-simulation-approach-for-beta-lactam-dosing-in-critically-ill-patients-receiving-prolonged-intermittent-renal-replacement-therapy
#10
Soo Min Jang, Katherine N Gharibian, Susan J Lewis, William H Fissell, Ashita J Tolwani, Bruce A Mueller
Cefepime, ceftazidime, and piperacillin/tazobactam are commonly used beta-lactam antibiotics in the critical care setting. For critically ill patients receiving prolonged intermittent renal replacement therapy (PIRRT), limited pharmacokinetic data are available to inform clinicians on the dosing of these agents. Monte Carlo simulations (MCS) can be used to guide drug dosing when pharmacokinetic trials are not feasible. For each antibiotic, MCS using previously published pharmacokinetic data derived from critically ill patients was used to evaluate multiple dosing regimens in 4 different prolonged intermittent renal replacement therapy effluent rates and prolonged intermittent renal replacement therapy duration combinations (4 L/h × 10 hours or 5 L/h × 8 hours in hemodialysis and hemofiltration modes)...
May 10, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29746497/peritoneal-dialysis-related-peritonitis-caused-by-pseudomonas-species-insight-from-a-post-millennial-case-series
#11
Wanhong Lu, Bonnie Ching-Ha Kwan, Kai Ming Chow, Wing-Fai Pang, Chi Bon Leung, Philip Kam-To Li, Cheuk Chun Szeto
BACKGROUND: Pseudomonas peritonitis is a serious complication of peritoneal dialysis (PD). However, the clinical course of Pseudomonas peritonitis following the adoption of international guidelines remains unclear. METHODS: We reviewed the clinical course and treatment response of 153 consecutive episodes of PD peritonitis caused by Pseudomonas species from 2001 to 2015. RESULTS: Pseudomonas peritonitis accounted for 8.3% of all peritonitis episodes...
2018: PloS One
https://www.readbyqxmd.com/read/29743760/antibiotic-prescription-organisms-and-its-resistance-pattern-in-patients-admitted-to-respiratory-icu-with-respiratory-infection-in-mysuru
#12
M Mahendra, B S Jayaraj, K S Lokesh, S K Chaya, Vivek Vardhan Veerapaneni, Sneha Limaye, Raja Dhar, Rajesh Swarnakar, Shrikant Ambalkar, P A Mahesh
Aim of Study: Respiratory infections account for significant morbidity, mortality and expenses to patients getting admitted to ICU. Antibiotic resistance is a major worldwide concern in ICU, including India. It is important to know the antibiotic prescribing pattern in ICU, organisms and its resistance pattern as there is sparse data on Indian ICUs. Materials and Methods: We conducted a prospective study from August 2015 to February 2016. All patients getting admitted to RICU with respiratory infection who were treated with antibiotics were included into study...
April 2018: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29740176/biofilm-formation-is-not-associated-with-worse-outcome-in-acinetobacter-baumannii-bacteraemic-pneumonia
#13
Yung-Chih Wang, Tzu-Wen Huang, Ya-Sung Yang, Shu-Chen Kuo, Chung-Ting Chen, Chang-Pan Liu, Yuag-Meng Liu, Te-Li Chen, Feng-Yee Chang, Shih-Hsiung Wu, Chorng-Kuang How, Yi-Tzu Lee
The effect of biofilm formation on bacteraemic pneumonia caused by A. baumannii is unknown. We conducted a 4-year multi-center retrospective study to analyze 71 and 202 patients with A. baumannii bacteraemic pneumonia caused by biofilm-forming and non-biofilm-forming isolates, respectively. The clinical features and outcomes of patients were investigated. Biofilm formation was determined by a microtitre plate assay. The antimicrobial susceptibilities of biofilm-associated cells were assessed using the minimum biofilm eradication concentration (MBEC) assay...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739906/ceftazidime-is-the-key-diversification-and-selection-driver-of-vim-type-carbapenemases
#14
Laura Martínez-García, José M González-Alba, Fernando Baquero, Rafael Cantón, Juan Carlos Galán
In recent decades, carbapenems have been considered the last line of antibiotic therapy for Gram-negative bacterial infections. Unfortunately, strains carrying a high diversity of β-lactamases able to hydrolyze carbapenems have emerged in the clinical setting. Among them, VIM β-lactamases have diversified in a bloom of variants. The evolutionary reconstructions performed in this work revealed that, at the end of the 1980s, two independent events involving diversification from VIM-2 and VIM-4 produced at least 25 VIM variants...
May 8, 2018: MBio
https://www.readbyqxmd.com/read/29735568/a-systematic-approach-to-the-selection-of-the-appropriate-avibactam-concentration-for-use-with-ceftazidime-in-broth-microdilution-susceptibility-testing
#15
Patricia A Bradford, Michael D Huband, Gregory G Stone
Selection of the avibactam concentration to combine with ceftazidime in susceptibility testing was determined using Gram-negative isolates with characterized β-lactamases predefined as "susceptible" or "resistant" based on the known inhibition spectrum of avibactam. MIC values were determined by broth microdilution of ceftazidime with fixed concentrations and ratios of avibactam. A constant concentration of 4 μg/mL of avibactam was selected for susceptibility testing with ceftazidime because of its ability to correctly categorize susceptible and resistant isolates while minimizing categorical errors...
May 7, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29721398/myoclonus-from-antibiotic-therapy-ceftazidime-induced-neurotoxicity-a-case-report-and-review
#16
Chong Yau Ong, Yan Qin
A 78-year-old Chinese man with a history of end-stage renal disease (ESRD) presented with fever of one-day duration. He was treated for catheter-related sepsis with intravenous piperacillin and tazobactam, which was later switched to vancomycin and ceftazidime secondary to persistent fever with negative cultures. On the fifth day of treatment with vancomycin and ceftazidime, he developed new-onset upper limb myoclonus which progressed to bilateral upper limb ataxia. A provisional diagnosis of myoclonus and ataxia secondary to neurotoxicity related to ceftazidime was made and the ceftazidime was ceased...
March 1, 2018: Curēus
https://www.readbyqxmd.com/read/29718896/salmonella-potsdam-causing-lumbar-vertebral-osteomyelitis-a-case-report
#17
Weike Cheng, Kejian Lian, Deqing Luo, Dasheng Lin, Wanqiang Feng, Hang Xian, Tongtao Li
RATIONALE: Salmonella osteomyelitis is an uncommon complication of salmonella infection, especially the salmonella vertebral osteomyelitis (SVO). PATIENT CONCERNS: We reported a case of a 29-year-old female who presented with serious lower back pain and severe limitation of motion for 50 days with no obvious inducements. She once had a fever up to 39.5°C. Physical examination only revealed limited motion of lower back without neurological complications. The laboratory results revealed no specificity...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29712652/first-penicillin-binding-protein-occupancy-patterns-of-%C3%AE-lactams-and-%C3%AE-lactamase-inhibitors-in-klebsiella-pneumoniae
#18
Dhruvitkumar S Sutaria, Bartolome Moya, Kari B Green, Tae Hwan Kim, Xun Tao, Yuanyuan Jiao, Arnold Louie, George L Drusano, Jürgen B Bulitta
Penicillin-binding proteins (PBPs) are the high affinity target sites of all β-lactam antibiotics in bacteria. It is well known that each β-lactam covalently binds to and thereby inactivates different PBPs with varying affinity. Despite β-lactams serving as cornerstone of our therapeutic armamentarium against Klebsiella pneumoniae , PBP binding data are missing for this pathogen. We aimed to generate the first PBP binding data on 13 chemically diverse and clinically relevant β-lactams and β-lactamase inhibitors in K...
April 30, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29709981/plasmid-mediated-ampc-%C3%AE-lactamase-and-underestimation-of-extended-spectrum-%C3%AE-lactamase-in-cefepime-susceptible-elevated-ceftazidime-mic-enterobacteriaceae-isolates
#19
Fumitaka Nishimura, Yoshitomo Morinaga, Norihiko Akamatsu, Junichi Matsuda, Norihito Kaku, Kazuaki Takeda, Naoki Uno, Kosuke Kosai, Hiroo Hasegawa, Katsunori Yanagihara
Phenotypic detection of extended-spectrum β-lactamase (ESBL) is important for public health and infection control; however, plasmid-mediated AmpC β-lactamases (pAmpCs) can interfere with the ESBL-phenotyping. We focused on Enterobacteriaceae strains which were susceptible to cefepime but had mildly-elevated MIC of ceftazidime, and studied the impact of pAmpC on the ESBL-phenotyping in this population. Genotyping of ESBL and pAmpC were performed on 528 clinical isolates of Escherichia coli, Klebsiella spp...
April 27, 2018: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29707286/-in-vitro-assessment-of-cefoperazone-sulbactam-based-combination-therapy-for-multidrug-resistant-acinetobacter-baumannii-isolates-in-china
#20
Tao Li, Meiyan Sheng, Tengzhen Gu, Yan Zhang, Ailiyaer Yirepanjiang, Yu Li
Background: Multidrug-resistant Acinetobacter baumannii (MDRAB) has emerged as an important pathogen of nosocomial infections. Even though cefoperazone-sulbactam is frequently used to treat MDRAB infections, this single-drug therapeutic approach often results in antibiotic resistance. Thus, combination therapy is preferred over single-drug therapy, particularly in the case of carbapenemase-producing gram negative bacteria. The aim of this study was to investigate the efficacy of cefoperazone-sulbactam combined with either tigecycline or rifampicin against clinical isolates of MDRAB...
March 2018: Journal of Thoracic Disease
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