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https://www.readbyqxmd.com/read/29456071/evaluation-of-sensititre-broth-microdilution-plate-for-determining-the-susceptibility-of-carbapenem-resistant-klebsiella-pneumoniae-to-polymyxins
#1
Sandra S Richter, James Karichu, Joshua Otiso, Hillary Van Heule, George Keller, Eric Cober, Laura J Rojas, Andrea M Hujer, Kristine M Hujer, Steve Marshall, Frederico Perez, Susan D Rudin, T Nicholas Domitrovic, Keith S Kaye, Robert Salata, David van Duin, Robert A Bonomo
Colistin and polymyxin B MICs were determined for 106 carbapenem-resistant Klebsiella pneumoniae (CR-Kp) isolates using Sensititre Research Use Only GNX2F plates (Thermo Fisher) and compared to CLSI broth macrodilution (BMD) as the reference method. For colistin, EUCAST breakpoints were applied and testing of isolates with very major (VM) errors was repeated in duplicate by both methods to determine a majority result. Essential agreement (MIC ± one dilution) of GNX2F with the reference method was 97.1% for polymyxin B and 92...
January 9, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29456043/colistin-alone-versus-colistin-plus-meropenem-for-treatment-of-severe-infections-caused-by-carbapenem-resistant-gram-negative-bacteria-an-open-label-randomised-controlled-trial
#2
Mical Paul, George L Daikos, Emanuele Durante-Mangoni, Dafna Yahav, Yehuda Carmeli, Yael Dishon Benattar, Anna Skiada, Roberto Andini, Noa Eliakim-Raz, Amir Nutman, Oren Zusman, Anastasia Antoniadou, Pia Clara Pafundi, Amos Adler, Yaakov Dickstein, Ioannis Pavleas, Rosa Zampino, Vered Daitch, Roni Bitterman, Hiba Zayyad, Fidi Koppel, Inbar Levi, Tanya Babich, Lena E Friberg, Johan W Mouton, Ursula Theuretzbacher, Leonard Leibovici
BACKGROUND: Colistin-carbapenem combinations are synergistic in vitro against carbapenem-resistant Gram-negative bacteria. We aimed to test whether combination therapy improves clinical outcomes for adults with infections caused by carbapenem-resistant or carbapenemase-producing Gram-negative bacteria. METHODS: A randomised controlled superiority trial was done in six hospitals in Israel, Greece, and Italy. We included adults with bacteraemia, ventilator-associated pneumonia, hospital-acquired pneumonia, or urosepsis caused by carbapenem-non-susceptible Gram-negative bacteria...
February 15, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29456042/evidence-to-improve-the-treatment-of-infections-caused-by-carbapenem-resistant-gram-negative-bacteria
#3
Federico Perez, Robert A Bonomo
No abstract text is available yet for this article.
February 15, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29455524/multiwall-carbon-nanotubes-induce-more-pronounced-transcriptomic-responses-in-pseudomonas-aeruginosa-pg201-than-graphene-exfoliated-boron-nitride-or-carbon-black
#4
Monika Mortimer, Naresh Devarajan, Dong Li, Patricia A Holden
Carbonaceous and boron nitride (BN) nanomaterials have similar applications and hydrophobic properties suggesting common release pathways and exposure to bacteria. While high nanomaterial concentrations can be bactericidal or growth-inhibitory, little is known regarding bacterial transcriptional responses to non-growth-inhibitory nanomaterial concentrations. Here, using one strain of Pseudomonas aeruginosa-a clinically and environmentally important bacterial taxon-we analyzed the comparative transcriptomic response to carbonaceous or BN nanomaterials...
February 19, 2018: ACS Nano
https://www.readbyqxmd.com/read/29452198/microbial-infection-pattern-pathogenic-features-and-resistance-mechanism-of-carbapenem-resistant-gram-negative-bacilli-during-long-term-hospitalization
#5
Shuxian Wen, Donghua Feng, Zerong Lu, Junyan Liu, Brian M Peters, Hailing Tang, Danhong Su, Yong-Ping Lin, Ling Yang, Zhenbo Xu, Mark E Shirtliff, Dingqiang Chen
BACKGROUND: Carbapenem-resistant Gram-negative bacilli (GNB) have become an important cause of nosocomial infections of hospitalized patients. METHODS: To investigate the microbial infection patterns and molecular epidemiology characteristics of the carbapenem-resistant GNB isolates from a long-term hospitalized patient, antimicrobial susceptibility testing, phenotypic screening test for carbapenemase production, PCR screening and DNA sequencing of carbapenemase genes, repetitive extragenic palindromic sequence-based PCR (REP-PCR), multilocus sequencing typing (MLST) and genetic environment analysis were performed...
February 13, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29449171/changes-in-antimicrobial-susceptibility-of-commonly-clinically-significant-isolates-before-and-after-the-interventions-on-surgical-prophylactic-antibiotics-spas-in-shanghai
#6
Su Wang, Li-Zhong Han, Yu-Xing Ni, Yi-Bo Zhang, Qun Wang, Da-Ke Shi, Wen-Hui Li, Yi-Chen Wang, Chen-Rong Mi
Surveillances and interventions on antibiotics use have been suggested to improve serious drug-resistance worldwide. Since 2007, our hospital have proposed many measures for regulating surgical prophylactic antibiotics (carbapenems, third gen. cephalosporins, vancomycin, etc.) prescribing practices, like formulary restriction or replacement for surgical prophylactic antibiotics and timely feedback. To assess the impacts on drug-resistance after interventions, we enrolled infected patients in 2006 (pre-intervention period) and 2014 (post-intervention period) in a tertiary hospital in Shanghai...
February 12, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29449049/extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-national-study-of-antimicrobial-treatment-for-pediatric-urinary-tract-infection
#7
M Lagree, S Bontemps, R Dessein, F Angoulvant, F Madhi, A Martinot, R Cohen, F Dubos
OBJECTIVE: To evaluate clinical practices for ESBL-producing urinary tract infection (UTI) in France. METHODS: We performed an observational, retrospective, cross-sectional, hospital-based study in 22 pediatric departments of university or secondary care hospitals. We collected data of the last five patients presenting with ESBL-producing UTI in 2012 and the physicians' therapeutic approach to two case vignettes of acute non-septic ESBL-producing pyelonephritis (7-month-old girl) and cystitis (30-month-old girl)...
February 12, 2018: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/29448036/molecular-characterization-of-multidrug-pneumococcal-clones-colonizing-healthy-children-in-m%C3%A3-rida-venezuela
#8
Beatríz Quintero Moreno, María Araque
We analyzed genetics mechanisms of antibiotics resistance, clonal composition and pili in forty eight MDR-pneumococci isolated from healthy children in Mérida, Venezuela. Intermediate resistance to penicillin was related to variations on pbp2b and pbp2x genes. High-level resistance to penicillin, low susceptibility to cephalosporins and carbapenems were associated with alterations on pbp1a, pbp2b and pbp2x genes. Non-beta-lactam resistance was associated with Tn3872, Tn5253, Tn6002, Tn2010 transposons. Macrolide-resistant strains carried ermB or mefE, but not the mefA gene...
February 12, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29447913/microbiological-surveillance-of-plasmid-mediated-colistin-resistance-in-human-enterobacteriaceae-isolates-in-romagna-northern-italy-august-2016-july-2017
#9
F Del Bianco, M Morotti, M F Pedna, P Farabegoli, V Sambri
OBJECTIVES: To start a surveillance program to investigate the possible diffusion of mobilized colistin resistance genes in Enterobacteriaceae strains isolated in the Unit of Microbiology of the Great Romagna Hub Laboratory. METHODS: All the colistin resistant Enterobacteriaceae, isolated from August 1st 2016 to July 31st 2017, were prospectively evaluated for mcr-1 a mcr-2. Backdated survey of mcr-3, mcr-4 and mcr-5 was performed on the same group of isolates. Species identification was achieved by Vitek MS and the antibiotic susceptibility testing was performed both with Vitek-2 and Sensititre systems...
February 12, 2018: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29447024/microbiology-and-clinical-outcomes-of-puerperal-sepsis-a-prospective-cohort-study
#10
Rumbidzai Majangara, Muchabayiwa Francis Gidiri, Zvavahera Mike Chirenje
The objectives of this study were to determine the identity and antibacterial susceptibility profiles of bacteria colonising the female genital tract and blood stream and their association with clinical outcomes in women with puerperal sepsis. A prospective descriptive cohort study was conducted at two tertiary hospitals in Zimbabwe. Endocervical swabs and blood were collected for culture and susceptibility testing from 151 consecutive women who met the World Health Organisation criteria for puerperal sepsis...
February 15, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29444952/treatment-of-infections-caused-by-extended-spectrum-beta-lactamase-ampc-and-carbapenemase-producing-enterobacteriaceae
#11
REVIEW
Jesús Rodríguez-Baño, Belén Gutiérrez-Gutiérrez, Isabel Machuca, Alvaro Pascual
Therapy of invasive infections due to multidrug-resistant Enterobacteriaceae (MDR-E) is challenging, and some of the few active drugs are not available in many countries. For extended-spectrum β-lactamase and AmpC producers, carbapenems are the drugs of choice, but alternatives are needed because the rate of carbapenem resistance is rising. Potential active drugs include classic and newer β-lactam-β-lactamase inhibitor combinations, cephamycins, temocillin, aminoglycosides, tigecycline, fosfomycin, and, rarely, fluoroquinolones or trimethoprim-sulfamethoxazole...
April 2018: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/29444829/multiplex-immunochromatographic-detection-of-oxa-48-kpc-and-ndm-carbapenemases-impact-of-the-inoculum-antibiotics-and-agar
#12
Ahmad Saleh, Stephan Göttig, Axel Hamprecht
SYNOPSIS For rapid detection of carbapenemase-producing Enterobacteriaceae (CPE), immunochromatographic lateral flow tests (ICT) have recently been developed. The aim of this study was to assess the new multiplex ICT RESIST-3 O.K.N®. and to investigate if it can be performed directly from susceptibility testing plates. Additionally the impact of the inoculum and carbapenem disks on sensitivity and specificity was evaluated. The new ICT was challenged using 63 CRE isolates, including 51 carbapenemase producers...
February 14, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29442147/-urosepsis
#13
Mathias W Pletz, Sebastian Weis, Christina Forstner, Florian Wagenlehner
Urosepsis is defined as a severe disease due to organ failure caused by a urinary tract infection. An empirical antibiotic therapy should be instigated within the first hour after diagnosis. Urine cultures and blood cultures should be performed before antibiotic treatment. Further diagnostics should be carried out at an early stage to enable an interventional focus control in the case of urinary tract obstruction or abscess formation, if necessary. Gram-negative pathogens are most frequently isolated. Extended spectrum beta-lactamase (ESBL) forming bacteria as a cause of urosepsis are increasing...
February 7, 2018: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/29441876/evaluation-of-antimicrobial-stewardship-as-for-appropriate-use-of-antimicrobial-agents
#14
T Matsuoka, M Kato, Y Shinoda, K Ohashi, S Yoshida, T Mori, T Tachi, T Yoshimura, H Teramachi
We implemented an antimicrobial stewardship (AS) program whereby pharmacists sought appropriate use of antimicrobial agents in January 2012. At that time, we targeted anti-methicillin-resistant Staphylococcus aureus (MRSA) agents and carbapenems; however, in January 2014, we added tazobactam/piperacillin (TAZ/PIPC). We evaluated outcomes using multilateral analyses. The average one-day dosage of carbapenems increased; however, the duration of administration and number of recipient patients decreased significantly (P < 0...
May 1, 2017: Die Pharmazie
https://www.readbyqxmd.com/read/29439654/prospective-study-on-human-fecal-carriage-of-enterobacteriaceae-possessing-mcr-1-and-mcr-2-genes-in-a-regional-hospital-in-hong-kong
#15
Wai-Sing Chan, Chun-Hang Au, Dona N Ho, Tsun-Leung Chan, Edmond Shiu-Kwan Ma, Bone Siu-Fai Tang
BACKGROUND: Human fecal carriage of Enterobacteriaceae possessing mobilized colistin resistance genes (mcr-1 and mcr-2) remains obscure in Hong Kong. As part of routine surveillance on emerging antibiotic resistance, we conducted a prospective study on this topic in a regional hospital in Hong Kong. METHODS: From October 31 to November 25, 2016, all fecal specimens submitted for routine analysis were included in this surveillance study. These comprised 672 consecutive routine fecal specimens collected from 616 individuals...
February 13, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29437920/genomic-analysis-of-hospital-plumbing-reveals-diverse-reservoir-of-bacterial-plasmids-conferring-carbapenem-resistance
#16
Rebecca A Weingarten, Ryan C Johnson, Sean Conlan, Amanda M Ramsburg, John P Dekker, Anna F Lau, Pavel Khil, Robin T Odom, Clay Deming, Morgan Park, Pamela J Thomas, David K Henderson, Tara N Palmore, Julia A Segre, Karen M Frank
The hospital environment is a potential reservoir of bacteria with plasmids conferring carbapenem resistance. Our Hospital Epidemiology Service routinely performs extensive sampling of high-touch surfaces, sinks, and other locations in the hospital. Over a 2-year period, additional sampling was conducted at a broader range of locations, including housekeeping closets, wastewater from hospital internal pipes, and external manholes. We compared these data with previously collected information from 5 years of patient clinical and surveillance isolates...
February 6, 2018: MBio
https://www.readbyqxmd.com/read/29434581/site-specific-recombination-at-xerc-d-sites-mediates-the-formation-and-resolution-of-plasmid-co-integrates-carrying-a-blaoxa-58-and-tnapha6-resistance-module-in-acinetobacter-baumannii
#17
María M Cameranesi, Jorgelina Morán-Barrio, Adriana S Limansky, Guillermo D Repizo, Alejandro M Viale
Members of the genus Acinetobacter possess distinct plasmid types which provide effective platforms for the acquisition, evolution, and dissemination of antimicrobial resistance structures. Many plasmid-borne resistance structures are bordered by short DNA sequences providing potential recognition sites for the host XerC and XerD site-specific tyrosine recombinases (XerC/D-like sites). However, whether these sites are active in recombination and how they assist the mobilization of associated resistance structures is still poorly understood...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29434066/perioperative-antimicrobial-therapy-in-preventing-infectious-complications-following-pancreatoduodenectomy
#18
Savio George Barreto, Amanjeet Singh, Azhar Perwaiz, Tanveer Singh, Manish Kumar Singh, Sunil Sharma, Adarsh Chaudhary
Background & objectives: Infectious complications have been reported to occur in up to 45 per cent of patients, following pancreatoduodenectomy (PD). The incidence of perioperative infectious and overall complications is higher in patients undergoing preoperative invasive endoscopic procedures. The aim of the study was to compare the role of a carbapenem administered as three-once daily perioperative doses on infectious complications in patients at high risk for these complications versus those at low risk...
October 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29433997/in-vitro-activities-of-carbapenems-in-combination-with-amikacin-colistin-or-fosfomycin-against-carbapenem-resistant-acinetobacter-baumannii-clinical-isolates
#19
Uthaibhorn Singkham-In, Tanittha Chatsuwan
Carbapenem-resistant Acinetobacter baumannii clinical isolates (n=23) were investigated for carbapenem resistance mechanisms and in vitro activities of carbapenems in combination with amikacin, colistin, or fosfomycin. Major carbapenem resistance mechanism was OXA-23 production. The vast majority of these isolates were OXA-23-producing A. baumannii ST195 and ST542, followed by novel STs, ST1417, and ST1423. The interuption of carO by a novel insertion sequence, ISAba40, was found in two isolates. The combinations of imipenem and fosfomycin, meropenem and amikacin, imipenem and amikacin, and imipenem and colistin were synergistic against carbapenem-resistant A...
January 31, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29432939/effect-of-elevated-imipenem-cilastatin-mics-on-patient-outcomes-in-gram-negative-bloodstream-infections
#20
Milena M McLaughlin, Cristina Miglis, Erik Skoglund, Jamie Wagner, Maria R Advincula, Marc H Scheetz
BACKGROUND: Carbapenem MICs are known to predict outcomes for patients with Gram-negative bacteremias. However, limited data exists on how MICs influence such outcomes when organisms are classified as carbapenem resistant. The purpose of this study was to evaluate the effect of increasing imipenem/cilastatin MICs on mortality. METHODS: Patients with an imipenem/cilastatin resistant (i.e. MIC>4mg/L), monomicrobial, Gram-negative bloodstream infection were eligible and assessed for baseline characteristics, organ function, microbiological data, timing and type of therapeutic treatment, and in-hospital mortality...
February 9, 2018: Journal of Global Antimicrobial Resistance
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