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https://www.readbyqxmd.com/read/29230684/imipenem-relebactam-and-meropenem-vaborbactam-two-novel-carbapenem-%C3%AE-lactamase-inhibitor-combinations
#1
REVIEW
George G Zhanel, Courtney K Lawrence, Heather Adam, Frank Schweizer, Sheryl Zelenitsky, Michael Zhanel, Philippe R S Lagacé-Wiens, Andrew Walkty, Andrew Denisuik, Alyssa Golden, Alfred S Gin, Daryl J Hoban, Joseph P Lynch, James A Karlowsky
Relebactam (formerly known as MK-7655) is a non-β-lactam, bicyclic diazabicyclooctane, β-lactamase inhibitor that is structurally related to avibactam, differing by the addition of a piperidine ring to the 2-position carbonyl group. Vaborbactam (formerly known as RPX7009) is a non-β-lactam, cyclic, boronic acid-based, β-lactamase inhibitor. The structure of vaborbactam is unlike any other currently marketed β-lactamase inhibitor. Both inhibitors display activity against Ambler class A [including extended-spectrum β-lactamases (ESBLs), Klebsiella pneumoniae carbapenemases (KPCs)] and class C β-lactamases (AmpC)...
December 12, 2017: Drugs
https://www.readbyqxmd.com/read/29229762/multiple-substitutions-lead-to-increased-loop-flexibility-and-expanded-specificity-in-acinetobacter-baumannii-carbapenemase-oxa-239
#2
Thomas M Harper, Cynthia M June, Magdalena A Taracila, Robert A Bonomo, Rachel A Powers, David A Leonard
OXA-239 is a class D carbapenemase isolated from an Acinetobacter baumannii strain found in Mexico.  This enzyme is a variant of OXA-23 with three amino acid substitutions in or near the active site.  These substitutions cause OXA-239 to hydrolyze late-generation cephalosporins and the monobactam aztreonam with greater efficiency than OXA-23.  OXA-239 activity against the carbapenems doripenem and imipenem is reduced approximately 3-fold and 20-fold respectively.  Further analysis demonstrated that two of the substitutions (P225S and D222N) are largely responsible for the observed alteration of kinetic parameters, while the third (S109L) may serve to stabilize the protein...
December 11, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29228415/the-implementation-of-a-hospital-wide-practice-for-the-selective-use-of-carbapenems-based-on-the-monitoring-of-susceptibility-of-pseudomonas-aeruginosa-isolates
#3
Toshio Ohshima, Satomi Asai, Miki Miyazawa, Yukari Yamamoto, Akifumi Hisada, Chie Kumazawa, Masayoshi Hashimoto, Katsuji Fukawa, Hideo Iwashita, Kazuo Umezawa, Sanetoshi Yamada, Yoshiro Yamamoto, Hayato Miyachi
OBJECTIVES: To control carbapenem-resistant Pseudomonas aeruginosa, we implemented a hospital-wide policy concerning the selective use of carbapenems based on the monitoring of P. aeruginosa isolates for susceptibility to five carbapenems using a customized dry plate method. In this study, we retrospectively investigated the outcome of our measures to control carbapenem-resistant P. aeruginosa. METHODS: To select effective carbapenems, 100 clinical isolates were collected, and the minimum inhibitory concentration (MIC) to 5 carbapenems (IPM/CS, MEPM, DRPM, BIPM and PAPM/BP) was monitored using a customized dry plate method from 2006 to 2013...
December 20, 2017: Tokai Journal of Experimental and Clinical Medicine
https://www.readbyqxmd.com/read/29228202/activity-of-ceftazidime-avibactam-against-problem-enterobacteriaceae-and-pseudomonas-aeruginosa-in-the-uk-2015-16
#4
David M Livermore, Danièle Meunier, Katie L Hopkins, Michel Doumith, Robert Hill, Rachel Pike, Peter Staves, Neil Woodford
Background: Ceftazidime/avibactam combines an established oxyimino-cephalosporin with the first diazabicyclooctane β-lactamase inhibitor to enter clinical use. We reviewed its activity against Gram-negative isolates, predominantly from the UK, referred for resistance investigation in the first year of routine testing, beginning in July 2015. Methods: Isolates were as received from referring laboratories; there is a bias to submit those with suspected carbapenem resistance...
December 8, 2017: Journal of Antimicrobial Chemotherapy
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/29227931/synthesis-and-antibacterial-evaluation-of-novel-cationic-chalcone-derivatives-possessing-broad-spectrum-antibacterial-activity
#6
Wen-Chao Chu, Peng-Yan Bai, Zhao-Qing Yang, De-Yun Cui, Yong-Gang Hua, Yi Yang, Qian-Qian Yang, En Zhang, Shangshang Qin
There is an urgent need to identify new antibiotics with novel mechanisms that combat antibiotic resistant bacteria. Herein, a series of chalcone derivatives that mimic the essential properties of cationic antimicrobial peptides were designed and synthesized. Antibacterial activities against drug-sensitive bacteria, including Staphylococcus aureus, Enterococcus faecalis, Escherichia coli and Salmonella enterica, as well as clinical multiple drug resistant isolates of methicillin-resistant S. aureus (MRSA), KPC-2-producing and NDM-1-producing Carbapenem-resistant Enterobacteriaceae were evaluated...
December 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29227741/new-subclass-b1-metallo-%C3%AE-lactamase-gene-from-a-clinical-pathogenic-myroides-odoratus-strain
#7
Su Xu, Yijian Chen, Zhuyingjie Fu, Ying Li, Guixiu Shi, Xiaogang Xu, Yang Liu, Minggui Wang
Myroides odoratus is a low-virulence opportunistic human pathogen. Infections caused by M. odoratus are not common, but reports are increasing in recent years. The biggest challenge for treatment is its resistance to most antibiotics. In 2015, we isolated a pathogenic multidrug-resistant strain of M. odoratus from a urinary tract infection (UTI) patient's urine sample. To report the experience in managing M. odoratus-related UTI and investigate the genetic mechanism of this carbapenem-resistant strain, we conducted a series of microbiological and molecular studies...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29226171/antimicrobial-resistance-of-sterile-site-infections-in-sub-saharan-africa-a-systematic-review
#8
Meklit Workneh, Morgan J Katz, Mohammed Lamorde, Sara E Cosgrove, Yukari C Manabe
Sparse data exist from sub-Saharan Africa (SSA) on the prevalence of antimicrobial resistance (AMR). A prior review of antimicrobial resistance in SSA from 1990 to 2013 showed a high prevalence of AMR to commonly used antibiotics in this setting. We reviewed the literature published since 2013. Four databases (PubMed, EMBASE, Cochrane, and African Journals Online) were searched for articles between February 2013 and March 2016 with a focus on sterile site infections (bacteremia, urinary tract infections [UTIs], and meningitis)...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/29225798/30-day-readmission-antibiotics-costs-and-costs-of-delay-to-adequate-treatment-of-enterobacteriaceae-uti-pneumonia-and-sepsis-a-retrospective-cohort-study
#9
Marya D Zilberberg, Brian H Nathanson, Kate Sulham, Weihong Fan, Andrew F Shorr
Background: Enterobacteriaceae are common pathogens in pneumonia, sepsis and urinary tract infection (UTI). Though rare, carbapenem resistance (CRE) among these organisms complicates efforts to ensure adequate empiric antimicrobial therapy. In turn this negatively impacts such outcomes as mortality and hospital costs. We explored proportion of total costs represented by antibiotics, 30-day readmission rates, and per-day costs of inadequate antimicrobial coverage among patients with Enterobacteriaceae pneumonia, sepsis and/or UTI in the context of inappropriate (IET) vs...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29224710/spm-1-producing-pseudomonas-aeruginosa-st277-clone-recovered-from-microbiota-of-migratory-birds
#10
Willames M B S Martins, Ana Clara Narciso, Rodrigo Cayô, Stéfanie Vanessa Santos, Lorena C C Fehlberg, Patrícia Locosque Ramos, João Batista da Cruz, Ana Cristina Gales
The production of São Paulo metallo-β-lactamase (SPM-1) is the most common carbapenem resistance mechanism detected among multidrug-resistant Pseudomonas aeruginosa clinical isolates in Brazil. Dissemination of SPM-1-producing P. aeruginosa has been restricted to the nosocomial settings, with sporadic reports of environmental isolates due to contamination by hospital sewage. Herein, we described the detection and molecular characterization of SPM-1-producing P. aeruginosa recovered from the microbiota of migratory birds in Brazil...
November 10, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29224318/-distribution-and-drug-resistance-of-pathogens-of-blood-stream-infection-in-patients-with-hematological-malignancies-after-chemotherapy
#11
S Z Chen, K N Lin, M Xiao, X F Luo, Q Li, J H Ren, R Y Huang, M M Chen, Z Z Ally, T Chen, J D Yang, Jianda Hu
Objective: To investigate the distribution and resistance of pathogens isolated from blood cultures in patients with hematological malignancies after chemotherapy in Union Hospital of Fujian Medical University so as to understand the real situation of blood stream infection (BSI) and provide the basis for rational use of antibiotics in clinic. Methods: The data of 657 strains isolated from blood culture specimens of patients with hematological malignancies from January 2013 to December 2016 were collected analyzed...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/29224317/-a-multicenter-retrospective-study-of-pathogenic-bacteria-distribution-and-drug-resistance-in-febrile-neutropenic-patients-with-hematological-diseases-in-shanghai
#12
J Zhu, J Hu, Y F Mao, F Y Chen, J Y Zhu, J M Shi, D D Yu, S G Hao, R Tao, P Liu, S Y Gu, J Hou, H Y He, A B Liang, Y Ding, L G Liu, Y H Xie, Q Zhu, Y H Yu, Y H Yao, W Chen, H L Xu, X H Han, C Wang
Objective: To investigate the pathogen spectrum distribution and drug resistance of febrile neutropenic patients with hematological diseases in Shanghai. Methods: A retrospective study was conducted on the clinical isolates from the febrile neutropenic patients hospitalized in the departments of hematology in 12 general hospitals in Shanghai from January 2012 to December 2014. The drug susceptibility test was carried out by Kirby-Bauer method. WHONET 5.6 software was used to analyze pathogenic bacteria and drug susceptibility data...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/29224313/-incidence-of-blood-stream-infections-of-1265-patients-with-hematopoietic-stem-cell-transplantation-and-analysis-of-pathogenic-bacteria
#13
Q Z Han, Y Chen, H Yang, X F Zhang, J Chen, D P Wu, S N Chen, H Y Qiu
Objective: To analyze the incidence and microbiological features of blood stream infections (BSI) of patients with hematopoietic stem cell transplantation (HSCT) and to provide laboratory data for empirical use of antibiotic for the HSCT patients with BSI. Methods: The incidence of bloodstream infection, the positive rate of blood culture, bacterial spectrum and drug resistance were analyzed in 1 265 HSCT recipients during 2013 and 2015 were retrospectively studied. Results: Of 1265 patients undergoing HSCT, 1 422 cases of suspected BSI occurred in 784 patients (61...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/29223516/antimicrobial-activity-of-plazomicin-against-enterobacteriaceae-producing-carbapenemases-from-50-brazilian-medical-centers
#14
Andreza Francisco Martins, Larissa Bail, Carmen Antonia Sanches Ito, Keite da Silva Nogueira, Tanise Vendruscolo Dalmolin, Amanda Silva Martins, Jaime Luis Lopes Rocha, Alisa W Serio, Felipe Francisco Tuon
Plazomicin is a next-generation aminoglycoside with activity against Enterobacteriaceae, including carbapenemase-producing Enterobacteriaceae (CPE). The aim of this study was to evaluate the activity of plazomicin against CPE (Klebsiella spp., Escherichia coli, Serratia spp., Enterobacter spp., Citrobacter spp., Morganella spp., Proteus spp., Providencia spp.) from different Brazilian hospitals. A total of 4000 carbapenem-resistant Enterobacteriaceae isolates were collected from clinical samples in 50 Brazilian hospitals during 2013-2015...
November 10, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29220754/association-of-high-mortality-with-extended-spectrum-%C3%AE-lactamase-esbl-positive-cultures-in-community-acquired-infections
#15
Sumit Ray, Dimple Anand, Sankalp Purwar, Arijit Samanta, Kaustubh V Upadhye, Prasoon Gupta, Debashis Dhar
PURPOSE: Infections due to multidrug resistant organisms have become a serious health concern worldwide. The present study was conducted to investigate the spectrum of microbial resistance pattern in the community and their effects on mortality. METHODS: A retrospective review and analysis of prospectively collected data was done of all patients admitted with diagnosis of sepsis in two tertiary care ICU's for a period of two years. Demographics, culture positivity, microbial spectrum, resistance pattern and outcome data were collected...
October 31, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29220374/a-blaoxa-181-harbouring-multi-resistant-st147-klebsiella-pneumoniae-isolate-from-pakistan-that-represent-an-intermediate-stage-towards-pan-drug-resistance
#16
Fouzia Nahid, Rabaab Zahra, Linus Sandegren
Carbapenem resistant Klebsiella pneumoniae (CR-KP) infections are an ever-increasing global issue, especially in the Indian subcontinent. Here we report genetic insight into a blaOXA-181 harbouring Klebsiella pneumoniae, belonging to the pandemic lineage ST147, that represents an intermediate stage towards pan-drug resistance. The CR-KP isolate DA48896 was isolated from a patient from Pakistan and was susceptible only to tigecycline and colistin. It harboured blaOXA-181 and was assigned to sequence type ST147...
2017: PloS One
https://www.readbyqxmd.com/read/29215335/previous-antibiotic-exposure-and-antimicrobial-resistance-patterns-of-acinetobacter-spp-and-pseudomonas-aeruginosa-isolated-from-patients-with-nosocomial-infections
#17
Zorana M Djordjevic, Marko M Folic, Slobodan M Jankovic
BACKGROUND: The alarming spread of antibiotic-resistant bacteria causing healthcare-associated infections has been extensively reported in recent medical literature. AIMS: To compare trends in antimicrobial consumption and development of resistance among isolates of Acinetobacter spp. and Pseudomonas aeruginosa that cause hospital infections. STUDY DESIGN: Cross-sectional study. METHODS: A study was conducted in a tertiary healthcare institution in central Serbia, during the 7-year period between January 2009 and December 2015...
December 1, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/29214766/abrupt-increase-in-rate-of-imipenem-resistance-in-acinetobacter-baumannii-complex-strains-isolated-from-general-hospitals-in-korea-and-correlation-with-carbapenem-administration-during-2002-2013
#18
Young Ah Kim, Yoon Soo Park, Taemi Youk, Hyukmin Lee, Kyungwon Lee
No abstract text is available yet for this article.
March 2018: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/29211819/genomic-investigation-of-a-putative-endoscope-associated-carbapenem-resistant-enterobacter-cloacae-outbreak-reveals-a-wide-diversity-of-circulating-strains-and-resistance-mutations
#19
Shawn E Hawken, Laraine L Washer, Christopher L Williams, Duane W Newton, Evan S Snitkin
A genomic epidemiologic investigation of a putative carbapenem-resistant Enterobacter cloacae outbreak revealed few plausible instances of nosocomial transmission, highlighting instead the frequent importation of E. cloacae into our hospital. Searching for genetic determinants of carbapenem resistance demonstrated that most resistance is due to convergent mutations in phylogenetically diverse E. cloacae.
October 26, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29211780/prevalence-and-antibiotic-resistance-of-pseudomonas-aeruginosa-in-water-samples-in-central-italy-and-molecular-characterization-of-oprd-in-imipenem-resistant-isolates
#20
Giuditta Fiorella Schiavano, Elisa Carloni, Francesca Andreoni, Silvia Magi, Maria Chironna, Giorgio Brandi, Giulia Amagliani
SCOPE: This study aimed to analyse the prevalence, antibiotic resistance and genetic relatedness of P. aeruginosa isolates obtained from potable and recreational water samples (n. 8,351) collected from different settings (swimming pools, n. 207; healthcare facilities, n 1,684; accommodation facilities, n. 1,518; municipal waterworks, n. 4,500; residential buildings, n. 235). Possible mechanisms underlying resistance to imipenem, with particular focus on those involving oprD-based uptake, were also explored...
2017: PloS One
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