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Enterobacteriacea

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https://www.readbyqxmd.com/read/28637265/importance-of-carbapenemase-production-detection-in-carbapenem-resistant-enterobacteriaceae-looking-beyond-epidemiological-purposes
#1
Adriana Jimenez, Lilian Abbo, Merhawi T Gebrezgi
No abstract text is available yet for this article.
June 16, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28636975/prevalence-of-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-and-methicillin-resistant-staphylococcus-aureus-in-pig-farms-in-switzerland
#2
Julia G Kraemer, João Pires, Marianne Kueffer, Eulalia Semaani, Andrea Endimiani, Markus Hilty, Anne Oppliger
The presence of Methicillin-Resistant Staphylococcus aureus (MRSA) in pig farms has been widely reported, and the emergence of extended-spectrum β-lactamase-producing Enterobacteriaceae (ESBL-E) has been documented in several countries. However, data for Switzerland are very scarce. This study aimed to compare changes in the prevalence of MRSA in Swiss pig farms between 2008 and 2015 and make the first ever estimates of the presence of ESBL-E and carbapenemase producers in pigs and pig farm workers. Results showed that ESBL-E was present in both pigs and farm workers and that the proportion of farms with MRSA had increased fourfold in seven years (from 7% to 31%)...
June 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28636668/microbiota-in-anorexia-nervosa-the-triangle-between-bacterial-species-metabolites-and-psychological-tests
#3
Francesca Borgo, Alessandra Riva, Alberto Benetti, Maria Cristina Casiraghi, Sara Bertelli, Stefania Garbossa, Simona Anselmetti, Silvio Scarone, Antonio E Pontiroli, Giulia Morace, Elisa Borghi
Anorexia nervosa (AN) is a psychiatric disease with devastating physical consequences, with a pathophysiological mechanism still to be elucidated. Metagenomic studies on anorexia nervosa have revealed profound gut microbiome perturbations as a possible environmental factor involved in the disease. In this study we performed a comprehensive analysis integrating data on gut microbiota with clinical, anthropometric and psychological traits to gain new insight in the pathophysiology of AN. Fifteen AN women were compared with fifteen age-, sex- and ethnicity-matched healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28636666/molecular-and-microbiological-report-of-a-hospital-outbreak-of-ndm-1-carrying-enterobacteriaceae-in-mexico
#4
Paola Bocanegra-Ibarias, Elvira Garza-González, Rayo Morfín-Otero, Humberto Barrios, Licet Villarreal-Treviño, Eduardo Rodríguez-Noriega, Ulises Garza-Ramos, Santiago Petersen-Morfin, Jesus Silva-Sanchez
OBJECTIVES: To characterize the microbiological, molecular and epidemiological data of an outbreak of carbapenem-resistant Enterobacteriaceae (CRE) in a tertiary-care hospital in Mexico. METHODS: From September 2014 to July 2015, all CRE clinical isolates recovered during an outbreak in the Hospital Civil "Fray Antonio Alcalde" in Jalisco, Mexico were screened for antimicrobial susceptibility, carbapenemase production, carbapenemase-encoding genes, and plasmid profiles...
2017: PloS One
https://www.readbyqxmd.com/read/28636609/genomic-and-phenotypic-characterisation-of-fluoroquinolone-resistance-mechanisms-in-enterobacteriaceae-in-durban-south-africa
#5
John Osei Sekyere, Daniel Gyamfi Amoako
Resistance to fluoroquinolones (FQ) is being increasingly reported and found to be mediated by efflux pumps, plasmid-mediated quinolone resistance genes (PMQR) and mutations in gyrA, gyrB, parC and parE. However, studies reporting on FQ resistance mechanisms (FQRM), particularly in Africa, are focused mostly on Salmonella. This study used a whole-genome-based approach to describe FQRM in forty-eight clinical Enterobacteriaceae isolates comprising of Klebsiella pneumoniae (n = 21), Serratia marcescens (n = 12), Enterobacter spp...
2017: PloS One
https://www.readbyqxmd.com/read/28634558/plesiomonas-shigelloides-an-unusual-cause-of-septic-abortion
#6
Gilbert Cornut, Xavier Marchand-Senecal, Christiane Gaudreau, Jeremie Berdugo, Gilles Gariepy, Catherine Tremblay, Patrice Savard
Plesiomonas shigelloides, the only oxidase-positive Enterobacteriaceae, is an inhabitant of freshwater and estuary ecosystems. We report the first possible case of Plesiomonas shigelloides-induced septic abortion. This 24-year-old female was successfully treated by dilatation and curettage as well as antimicrobial therapy.
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28631634/phenotypic-and-molecular-characterization-of-cefotaximases-temoniera-and-sulfhydryl-variable-%C3%AE-lactamases-in-pseudomonas-and-acinetobacter-isolates-in-an-indian-tertiary-health-care-center
#7
Sana Jamali, Mohammed Shahid, Farrukh Sobia, Anuradha Singh, Haris M Khan
BACKGROUND: Cefotaximases (CTX-M), temoniera (TEM), and sulfhydryl variable (SHV) constitute a rapidly growing cluster of enzymes that have disseminated geographically. They are spreading to species other than Enterobacteriaceae and might be responsible for the presence of blaCTX-M,blaTEM, and blaSHVgenes in Pseudomonas and Acinetobacter spp. The present study was designed to characterize CTX-M, TEM, and SHV phenotypically and genotypically in Pseudomonas and Acinetobacter spp. MATERIALS AND METHODS: A total of 90 isolates (73 Pseudomonas and 17 Acinetobacter spp...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28631587/dietary-supplementation-with-a-nucleotide-rich-yeast-extract-modulates-gut-immune-response-and-microflora-in-weaned-pigs-in-response-to-a-sanitary-challenge
#8
S M Waititu, F Yin, R Patterson, A Yitbarek, J C Rodriguez-Lecompte, C M Nyachoti
An experiment was carried out to evaluate the short-term effect of supplementing a nucleotide-rich yeast extract (NRYE) on growth performance, gut structure, immunity and microflora of piglets raised under sanitary and unsanitary conditions. A total of 84, 21-day old piglets were used in this study; 42 piglets were raised in a room designated as the clean room that was washed once per week, whereas the other 42 piglets were raised in a room designated as the unclean room in which 7 kg of manure from the sow herd was spread on each pen floor on day 1 and 7 and the room was not washed throughout the experiment...
June 20, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28631411/function-of-bacterial-community-dynamics-in-the-formation-of-cadaveric-semiochemicals-during-in-situ-carcass-decomposition
#9
Javier Pascual, Christian von Hoermann, Ann-Marie Rottler-Hoermann, Omer Nevo, Alicia Geppert, Johannes Sikorski, Katharina J Huber, Sandra Steiger, Manfred Ayasse, Jörg Overmann
The decomposition of dead mammalian tissue involves a complex temporal succession of epinecrotic bacteria. Microbial activity may release different cadaveric volatile organic compounds which in turn attract other key players of carcass decomposition such as scavenger insects. To elucidate the dynamics and potential functions of epinecrotic bacteria on carcasses, we monitored bacterial communities developing on still-born piglets incubated in different forest ecosystems by combining high-throughput Illumina 16S rRNA sequencing with gas chromatography-mass spectrometry of volatiles...
June 19, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28630686/fecal-carriage-of-extended-spectrum-%C3%AE-lactamase-and-carbapenemase-producing-enterobacteriaceae-in-egyptian-patients-with-community-onset-gastrointestinal-complaints-a-hospital-based-cross-sectional-study
#10
H M Abdallah, N Alnaiemi, E A Reuland, B B Wintermans, A Koek, A M Abdelwahab, A Samy, K W Abdelsalam, C M J E Vandenbroucke-Grauls
OBJECTIVES: The aim of this study was to determine the prevalence of extended-spectrum β-lactamase (ESBL) and carbapenemase production among Enterobacteriaceae isolated from ambulatory patients with gastrointestinal complaints admitted to El-Ahrar General Hospital, Zagazig, Egypt in the period between January 2013 and May 2013. METHODS: One hundred and thirteen Enterobacteriaceae isolates were recovered from 100 consecutive Egyptian patients with community-onset gastrointestinal complaints...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28630202/identifying-spectra-of-activity-and-therapeutic-niches-for-ceftazidime-avibactam-and-imipenem-relebactam-against-carbapenem-resistant-enterobacteriaceae
#11
Ghady Haidar, Cornelius J Clancy, Liang Chen, Palash Samanta, Ryan K Shields, Barry N Kreiswirth, M Hong Nguyen
We determined imipenem, imipenem-relebactam, ceftazidime and ceftazidime-avibactam minimum inhibitory concentrations (MICs) against 100 CRE isolates that underwent whole genome sequencing. KPCs were the most common carbapenemases. Forty-six isolates carried ESBLs. With the addition of relebactam, imipenem susceptibility increased from 8% to 88%. With the addition of avibactam, ceftazidime susceptibility increased from 0% to 85%. Neither imipenem-relebactam nor ceftazidime-avibactam was active against MBL-producers...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630197/pharmacodynamics-of-cefepime-combined-with-tazobactam-against-clinically-relevant-enterobactereaceae-in-a-neutropenic-mouse-thigh-model
#12
Maria J Melchers, Anita C van Mil, Claudia Lagarde, Jan den Hartigh, Johan W Mouton
The lack of new antibiotics prompted the investigation of the combination of two existing agents cefepime, a broad-spectrum cephalosporin and tazobactam to broaden its efficacy against extended-spectrum beta-lactamase producing Enterobacteriaceae. We determined the pharmacokinetic and pharmacodynamic properties of the combination in a murine neutropenic thigh model in order to establishing its exposure- response relationships (ERR). The PK of cefepime was determined for five doses; that of tazobactam was determined in earlier studies (Melchers et al Antimicrob...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630192/in-vitro-activity-of-aztreonam-avibactam-against-enterobacteriaceae-and-pseudomonas-aeruginosa-isolated-by-clinical-laboratories-in-40-countries-from-2012-to-2015
#13
James A Karlowsky, Krystyna M Kazmierczak, Boudewijn L M de Jonge, Meredith A Hackel, Daniel F Sahm, Patricia A Bradford
The combination of the monobactam, aztreonam, and the non-β-lactam β-lactamase inhibitor, avibactam, is currently in clinical development for the treatment of serious infections caused by metallo-β-lactamase (MBL)-producing Enterobacteriaceae, a difficult to treat subtype of carbapenem-resistant Enterobacteriaceae for which therapeutic options are currently very limited. The present study tested clinically significant isolates of Enterobacteriaceae (n=51,352) and Pseudomonas aeruginosa (n=11,842) collected from hospitalized patients in 208 medical center laboratories from 40 countries from 2012 to 2015 for in vitro susceptibility to aztreonam-avibactam, aztreonam, and comparator antimicrobial agents using standard broth microdilution methodology...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630191/ceftazidime-avibactam-and-aztreonam-an-interesting-strategy-to-overcome-%C3%AE-lactam-resistance-conferred-by-metallo-%C3%AE-lactamases-in-enterobacteriaceae-and-pseudomonas-aeruginosa
#14
Benjamin Davido, Lesly Fellous, Christine Lawrence, Virginie Maxime, Martin Rottman, Aurélien Dinh
We have read with great interest Marshal S. et al. regarding the efficacy of the ceftazidime-avibactam (CAZ-AVI) and aztreonam (ATM) combination on metallo- β -lactamases producing Enterobacteriaceae (1).….
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630181/in-vitro-activity-of-the-siderophore-cephalosporin-cefiderocol-against-a-recent-collection-of-clinically-relevant-gram-negative-bacilli-from-north-america-and-europe-including-carbapenem-non-susceptible-isolates-the-sidero-wt-2014-study
#15
Meredith A Hackel, Masakatsu Tsuji, Yoshinori Yamano, Roger Echols, James A Karlowsky, Daniel F Sahm
Cefiderocol (formerly S-649266) is an investigational siderophore cephalosporin. Iron-depleted cation-adjusted Mueller-Hinton broth (ID-CAMHB) was prepared according to the Clinical and Laboratory Standards Institute (CLSI) protocol and used to perform broth microdilution testing of cefiderocol against a 2014-2015 collection of clinical isolates of gram-negative bacilli from North America (n=4,239) and Europe (n=4,966). The concentration of cefiderocol inhibiting 90% of isolates tested (MIC90) was: 0.5 (North America; n=3,007) and 1 μg/ml (Europe; n=3,080) for all isolates of Enterobacteriaceae; 1 (North America; n=30) and 4 μg/ml (Europe; n=139) for meropenem-non-susceptible (MIC ≥2 μg/ml) isolates of Enterobacteriaceae; 0...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28629229/colistin-resistance-associated-with-outer-membrane-protein-change-in%C3%A2-klebsiella-pneumoniae-and-enterobacter-asburiae
#16
Béla Kádár, Béla Kocsis, Ákos Tóth, Katalin Kristóf, Péter Felső, Béla Kocsis, Katalin Böddi, Dóra Szabó
In this study, outer membrane proteins (OMPs) of colistin-resistant Klebsiella pneumoniae and Enterobacter asburiae were analyzed. One colistin-susceptible and three colistin-resistant K. pneumoniae sequence type 258 strains as well as one colistin-susceptible E. asburiae and its colistin-heteroresistant counterpart strain were involved in the study. OMP analysis of each strain was performed by microchip method. Matrix-assisted laser desorption ionization time of flight/mass spectrometry (MALDI-TOF/MS) investigation was carried out after separation of OMPs by two-dimensional gel electrophoresis and in-gel digestion...
June 20, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28628439/locally-acquired-mcr-1-in-escherichia-coli-australia-2011-and-2013
#17
Justin A Ellem, Andrew N Ginn, Sharon C-A Chen, John Ferguson, Sally R Partridge, Jonathan R Iredell
We identified discrete importation events of the mcr-1 gene on incompatibility group IncI2 plasmids in Escherichia coli isolated from patients in New South Wales, Australia, in 2011 and 2013. mcr-1 is present in a small minority of colistin-resistant Enterobacteriaceae and appears not to be established locally.
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28627852/multidrug-resistant-bacteria-and-travel
#18
Serge De Vallière
Antimicrobial resistance is a global problem which affects also tropical countries. Travelers to these regions expose themselves to the risk of being colonised and infected with multidrug-resistant bacteria. The region visited, the occurrence of diarrhoea and the use of antibiotics are the principal risk factors leading to colonisation with multidrug-resistant Enterobacteriaceae, which can affect up to 80% of travellers. Colonisation with meticillin resistant Staphylococcus aureus and vancomycin resistant enterococci are often due to contacts with the health care system of the visited country...
May 3, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28626457/characterization-of-novel-integrons-in1085-and-in1086-and-the-surrounding-genes-in-plasmids-from-enterobacteriaceae-and-the-role-for-attcaada16-structural-features-during-atti1-%C3%A3-attc-integration
#19
Dongguo Wang, Wei Hou, Jiayu Chen, Linjun Yang, Zhihui Liu, Zhe Yin, Jiao Feng, Dongsheng Zhou
Novel class 1 integrons In1085 and In1086, containing the class D β-lactamase -encoding gene blaOXA, were identified in clinical enterobacterial strains. In this study, we aimed to characterize the genetic contexts of In1085 and In1086, with the goal of identifying putative mechanisms of integron mobilization. Four plasmids, approximately 5.3, 5.3, 5.7, and 6.6 kb, from 71 clinical Enterobacteriaceae strains were found to contain class 1 integrons (In37, In62, In1085, and In1086, respectively). Two of these plasmids, pEco336 and pNsa292, containing In1085 and In1086, respectively, were further characterized by antibiotic susceptibility testing, conjugation experiments, PCR, sequencing, and gene mapping...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28625838/comparison-of-time-to-detection-values-between-bact-alert-%C3%A2-virtuo%C3%A2-and-bact-alert-%C3%A2-3d-instruments-for-clinical-blood-cultures-samples
#20
Francesco Congestrì, Maria Federica Pedna, Michela Fantini, Michela Samuelli, Pasqua Schiavone, Arianna Torri, Stefania Bertini, Vittorio Sambri
OBJECTIVES: The early detection of bacteraemia and fungemia is of paramount importance to guide the antimicrobial therapy in septic patients. In this study the "time to detection" (TTD) values for the new blood culture system BacT/ALERT(®) VIRTUO™ (VIRTUO) was evaluated in 1462 positive clinical bottles and compared with the TTD identified for 1601 positive clinical bottles incubated in the BacT/ALERT(®) 3D (BTA 3D). METHODS: The most representative microorganisms isolated from bottles incubated in both blood culture systems were divided into 8 categories (in order of frequency): Coagulase-Negative-Staphylococci (CoNS), Escherichia coli, Enterobacteriaceae (other than E...
June 15, 2017: International Journal of Infectious Diseases: IJID
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