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https://www.readbyqxmd.com/read/28233789/in-silico-serine-%C3%AE-lactamases-analysis-reveals-a-huge-potential-resistome-in-environmental-and-pathogenic-species
#1
Christian Brandt, Sascha D Braun, Claudia Stein, Peter Slickers, Ralf Ehricht, Mathias W Pletz, Oliwia Makarewicz
The secretion of antimicrobial compounds is an ancient mechanism with clear survival benefits for microbes competing with other microorganisms. Consequently, mechanisms that confer resistance are also ancient and may represent an underestimated reservoir in environmental bacteria. In this context, β-lactamases (BLs) are of great interest due to their long-term presence and diversification in the hospital environment, leading to the emergence of Gram-negative pathogens that are resistant to cephalosporins (extended spectrum BLs = ESBLs) and carbapenems (carbapenemases)...
February 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28232823/development-of-a-rapid-reverse-blot-hybridization-assay-for-detection-of-clinically-relevant-antibiotic-resistance-genes-in-blood-cultures-testing-positive-for-gram-negative-bacteria
#2
Hye-Young Wang, Gilsung Yoo, Juwon Kim, Young Uh, Wonkeun Song, Jong Bae Kim, Hyeyoung Lee
Rapid and accurate identification of the causative pathogens of bloodstream infections is crucial for the prompt initiation of appropriate antimicrobial therapy to decrease the related morbidity and mortality rates. The aim of this study was to evaluate the performance of a newly developed PCR-reverse blot hybridization assay (REBA) for the rapid detection of Gram-negative bacteria (GNB) and their extended-spectrum β-lactamase (ESBL), AmpC β-lactamase, and carbapenemase resistance genes directly from the blood culture bottles...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28232228/in-vitro-activity-of-three-commercial-bacteriophage-cocktails-against-multidrug-resistant-escherichia-coli-and-proteus-spp-strains-of-human-and-non-human-origin
#3
Odette J Bernasconi, Valentina Donà, Regula Tinguely, Andrea Endimiani
OBJECTIVES: Bacteriophages may represent a therapeutic alternative to treat infections caused by multidrug-resistant (MDR) pathogens. However, studies analysing their activity against MDR Enterobacteriaceae are limited. METHODS: The in vitro lytic activity of three commercial bacteriophage cocktails (PYO, INTESTI and Septaphage) was evaluated against 70 Escherichia coli and 31 Proteus spp. of human and non-human origin. Isolates were characterised by phenotypic and genotypic METHODS: and included 82 MDR strains [44 extended-spectrum-β-lactamase (ESBL)-producers (18 CTX-M-15-like, including ST131/ST648 E...
February 20, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28223374/enterobacter-cloacae-complex-isolates-harboring-blanmc-a-or-blaimi-type-class-a-carbapenemase-genes-on-novel-chromosomal-integrative-elements-and-plasmids
#4
David A Boyd, Laura F Mataseje, Ross Davidson, Johannes A Delport, Jeff Fuller, Linda Hoang, Brigitte Lefebvre, Paul Levett, Diane L Roscoe, Barbara M Willey, Michael R Mulvey
Carbapenem-resistant Enterobacter cloacae complex isolates submitted to a reference laboratory from 2010 to 2015 were screened by PCR for seven common carbapenemase gene groups, namely, KPC, NDM, OXA-48, VIM, IMP, GES, and NMC-A/IMI. Nineteen of the submitted isolates (1.7%) were found to harbor Ambler class A blaNMC-A or blaIMI-type carbapenemases. All 19 isolates were resistant to at least one carbapenem but susceptible to aminoglycosides, trimethoprim-sulfamethoxazole, tigecycline, and ciprofloxacin. Most isolates (17/19) gave positive results with the Carba-NP test for phenotypic carbapenemase detection...
February 21, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28222811/recurring-septic-shock-in-a-patient-with-blunt-abdominal-and-pelvic-trauma-how-mandatory-is-source-control-surgery-a-case-report
#5
Antonella Frattari, Giustino Parruti, Rocco Erasmo, Luigi Guerra, Ennio Polilli, Rosamaria Zocaro, Giuliano Iervese, Paolo Fazii, Tullio Spina
BACKGROUND: In critically ill patients with colonization/infection of multidrug-resistant organisms, source control surgery is one of the major determinants of clinical success. In more complex cases, the use of different tools for sepsis management may allow survival until complete source control. CASE PRESENTATION: A 42-year-old white man presented with traumatic hemorrhagic shock. Unstable pelvic fractures led to emergency stabilization surgery. Fever ensued with diarrhea, followed by septic shock...
February 22, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28216097/epidemiology-and-resistance-characteristics-of-pseudomonas-aeruginosa-isolates-from-the-respiratory-department-of-a-hospital-in-china
#6
Wei Feng, Fengjun Sun, Qian Wang, Wei Xiong, Xuewen Qiu, Xiaotian Dai, Peiyuan Xia
OBJECTIVES: Pseudomonas aeruginosa is one of the most common pathogens causing nosocomial pneumonia. The aim of this study was to investigate the epidemiology and resistance of P. aeruginosa isolated from hospitalised patients in the respiratory department of a hospital in China. METHODS: Clinical isolates were collected from the respiratory department of Southwest Hospital (Chongqing, China) from January 2013 to December 2014. Patients' social and demographic information was obtained from the hospital's information system...
February 12, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28216021/prevalence-antibiotic-susceptibility-and-characterization-of-antibiotic-resistant-genes-among-carbapenem-resistant-gram-negative-bacilli-and-yeast-in-intestinal-flora-of-cancer-patients-in-north-lebanon
#7
Rima Christophy, Marwan Osman, Hassan Mallat, Marcel Achkar, Azzam Ziedeh, Walid Moukaddem, Fouad Dabboussi, Monzer Hamze
The emergence and spread of carbapenem-resistant bacteria are a significant clinical and public health concern. The aim of the study is to determine the prevalence of intestinal carriage of carbapenem-resistant bacteria and yeasts in cancer patients under chemotherapy. 41 stool samples collected from cancer patients in Nini hospital in Tripoli, North Lebanon have been analyzed. After isolating yeasts and carbapenem-resistant bacteria, a biochemical identification and antimicrobial susceptibility profile were determined...
February 15, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28215914/fecal-carriage-of-mdros-in-a-population-of-lebanese-elderly-dynamics-and-impact-on-bacterial-fitness
#8
Caren Challita, Elias Dahdouh, Michel Attieh, Iman Dandachi, Elio Ragheb, Roy Taoutel, Carl Tanba, Ziad Daoud
Muti-Drug Resistant Organisms (MDROs) are problematic all over the world, especially in Lebanon. High fecal carriage rates of MDR Enterobacteriaceae were reported from Lebanese nursing homes. Some studies show that MDROs have a fitness cost as compared to sensitive isolates. In this study, the competitive growth of MDR Escherichia coli obtained from fecal samples from elderly is assessed. Fecal swabs from ten elderly patients from a Lebanese nursing home were obtained between June and December, 2015. Isolates were identified by API 20E and antimicrobial susceptibilities were determined...
February 16, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28213334/reactive-oxygen-a-novel-antimicrobial-mechanism-for-targeting-biofilm-associated-infection
#9
REVIEW
Matthew S Dryden, Jonathan Cooke, Rami J Salib, Rebecca E Holding, Timothy Biggs, Ali A Salamat, Raymond N Allan, Rachel S Newby, Fenella Halstead, Beryl Oppenheim, Thomas Hall, Sophie C Cox, Liam M Grover, Zain Al-Hindi, Lilyann Novak-Frazer, Malcolm D Richardson
Reactive oxygen species (ROS) is a novel therapeutic strategy for topical or local application to wounds, mucosa or internal structures where there may be heavy bacterial bioburden with biofilm and chronic inflammation. Bacterial biofilms are a significant problem in clinical settings owing to their increased tolerance towards conventionally prescribed antibiotics and their propensity for selection of further antibacterial resistance. There is therefore a pressing need for the development of alternative therapeutic strategies that can improve antibiotic efficacy towards biofilms...
February 14, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28209835/draft-genome-sequence-of-a-colistin-resistant-klebsiella-pneumoniae-clinical-strain-carrying-the-blandm-1-carbapenemase-gene
#10
Zhihong Yao, Yu Feng, Ji Lin, Zhiyong Zong
Klebsiella pneumoniae strain WCHKP1845, recovered from the sputum of a patient with pneumonia, was resistant to colistin and carried the carbapenemase gene blaNDM-1 Here, we report its 5.4-Mb draft genome sequence, comprising 140 contigs with an average 57.33% G+C content. The genome contains 5,118 coding sequences and 88 tRNA genes.
February 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28209815/whole-genome-sequence-of-a-colombian-acinetobacter-baumannii-strain-a-coproducer-of-oxa-72-and-oxa-255-like-carbapenemases
#11
Sandra Yamile Saavedra, Diego Prada-Cardozo, Verónica Rincón, Hermes Pérez-Cardona, Andrea Melissa Hidalgo, María Nilse González, María T Reguero, Emilia M Valenzuela de Silva, José R Mantilla, Laurent Falquet, Emiliano Barreto-Hernández, Carolina Duarte
Colombian Acinetobacter baumannii strain ST920 was isolated from the sputum of a 68-year-old male patient. This isolate possessed blaOXA-72 and blaOXA-255-like genes. The assembled genome contained 4,104,098 pb and 38.79% G+C content. This is the first case reported of the coproduction (blaOXA-72 and blaOXA-255-like) of carbapenem-hydrolyzing class D β-lactamases (CHDLs) in Acinetobacter baumannii.
February 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28208889/management-of-pneumonia-and-blood-stream-infections-with-new-antibiotic-adjuvant-entity-ceftriaxone-sulbactam-disodium-edetate-a-novel-way-to-spare-carbapenems
#12
Mohammad Shameem, Mohammad Amin Mir
INTRODUCTION: Nosocomial infections have been considered as a major health problem causing incremental morbidity, mortality and costs of therapy. AIM: This retrospective study was initiated with aim to analyse the comparative efficacy of a novel Antibiotic Adjuvant Entity (AAE), a combination of ceftriaxone + sulbactam + disodium edetate and meropenem in combination with colistin, for the management of Multi Drug Resistant (MDR) nosocomial Gram-negative bacterial infections...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208858/approach-to-carbapenemase-detection-in-klebsiella-pneumoniae-in-routine-diagnostic-laboratories
#13
Rangnekar Aseem, Shalini Shenoy, Suchitra Shenoy Mala, Shrikala Baliga, Agarwal Ashish
INTRODUCTION: Resistance to Carbapenems in Klebsiella may be due to Carbapenem hydrolysing enzymes. Accurate detection of carbapenemase must be done for patient treatment and epidemiological purposes. AIM: To detect carbapenemase production by performing Modified Hodge Test (MHT), Combined Disk Test (CDT) for Metallo-β-Lactamases (MBL) and PCR for blaKPC gene, to evaluate the performance of MHT using MacConkey Agar (MCA) and to access the value of MHT for carbapenemase detection...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205502/trends-in-carbapenemase-producing-enterobacteriaceae-france-2012-to-2014
#14
Laurent Dortet, Gaëlle Cuzon, Valérie Ponties, Patrice Nordmann
In 2014, a total of 2,976 Enterobacteriaceae isolates with decreased susceptibility to carbapenems were received at the French Associated National Reference Center for Antibiotic Resistance (NRC) and were characterised for their molecular resistance mechanism to carbapenems and compared with results obtained during 2012 and 2013.The overall number of enterobacterial isolates with decreased susceptibility to carbapenems received at the NRC rapidly increased (more than twofold in two years) with a growing proportion of carbapenemase producers (23...
February 9, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28199647/oxa-48-like-carbapenemases-in-the-uk-an-analysis-of-isolates-and-cases-from-2007-to-2014
#15
Jacqueline Findlay, Katie L Hopkins, Richard Loy, Michel Doumith, Danièle Meunier, Robert Hill, Rachel Pike, Nazim Mustafa, David M Livermore, Neil Woodford
No abstract text is available yet for this article.
February 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28198682/molecular-epidemiology-and-antimicrobial-resistance-phenotypes-of-acinetobacter-baumannii-isolated-from-patients-in-three-hospitals-in-southern-vietnam
#16
Nguyen Tuan Anh, Tran Vu Thieu Nga, Huynh Minh Tuan, Nguyen Si Tuan, Dao Minh Y, Nguyen Van Vinh Chau, Stephen Baker, Ho Huynh Thuy Duong
Multidrug resistance in the nosocomial pathogen Acinetobacter baumannii limits therapeutic options and impacts on clinical care. Resistance against carbapenems, a group of last-resort antimicrobials for treating multidrug-resistant (MDR) A. baumannii infections, is associated with the expression (and over-expression) of carbapenemases encoded by the blaOXA genes. The aim of this study was to determine the prevalence of antimicrobial-resistant A. baumannii associated with infection in three hospitals in southern Vietnam and to characterize the genetic determinants associated with resistance against carbapenems...
January 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28196696/patients-hospitalized-abroad-as-importers-of-multiresistant-bacteria-a-cross-sectional-study
#17
Tamim Khawaja, Juha Kirveskari, Sara Johansson, Juuso Väisänen, Aurora Djupsjöbacka, Annika Nevalainen, Anu Kantele
OBJECTIVES: The pandemic spread of multidrug-resistant (MDR) bacteria poses a threat to healthcare worldwide, with highest prevalence in indigent regions of the (sub)tropics. As hospitalization constitutes a major risk factor for colonization, infection control management in low-prevalence countries urgently needs background data on patients hospitalized abroad. METHODS: We collected data on 1122 patients who, after hospitalization abroad, were treated at the Helsinki University Hospital between 2010 and 2013...
February 11, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28191865/high-carbapenem-resistance-in-clinical-gram-negative-pathogens-isolated-in-egypt
#18
Hazim O Khalifa, Ahmed M Soliman, Ashraf M Ahmed, Toshi Shimamoto, Toshinori Hara, Mitsuyasu Ikeda, Yuta Kuroo, Shizuo Kayama, Motoyuki Sugai, Tadashi Shimamoto
The emergence and spread of carbapenem-resistant gram-negative bacteria poses a serious threat to human health worldwide. Currently, little is known about the molecular mechanisms underlying carbapenem resistance and their prevalence among gram-negative bacteria in Egypt. In this study, we analyzed carbapenemase production in gram-negative bacteria isolated from hospitalized patients in Egypt in 2014. All isolates were subjected to phenotypic and genotypic susceptibility testing for carbapenem resistance. Our results indicated a high level of carbapenem-resistant gram-negative bacteria in Egypt, with 50...
February 13, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28191308/ralstonia-mannitolilytica-infections-in-an-oncologic-day-ward-description-of-a-cluster-among-high-risk-patients
#19
Claudia Lucarelli, Enea Gino Di Domenico, Luigi Toma, Domenico Bracco, Grazia Prignano, Maria Fortunati, Lorella Pelagalli, Fabrizio Ensoli, Patrizio Pezzotti, Aurora García-Fernández, Annalisa Pantosti, Loredana Ingrosso
BACKGROUND: Ralstonia spp, an environmental microorganism, has been occasionally associated with healthcare infections. The aim of this study was to investigate an outbreak caused by Ralstonia mannitolilytica in oncology patients. METHODS: Case definition: Oncology outpatients attending a day ward, with positive blood and/or central venous catheter (CVC) culture for Ralstonia spp from September 2013 - June 2014. We analysed medical records, procedures and environmental samples...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28185222/trimethoprim-sulfamethoxazole-therapy-for-patients-with-carbapenemase-producing-klebsiella-pneumoniae-infections-retrospective-single-center-case-series
#20
Rita Murri, Barbara Fiori, Teresa Spanu, Ilaria Mastrorosa, Francesca Giovannenze, Francesco Taccari, Claudia Palazzolo, Giancarlo Scoppettuolo, Giulio Ventura, Maurizio Sanguinetti, Roberto Cauda, Massimo Fantoni
OBJECTIVE: The objective of the study was to evaluate the efficacy and tolerability of trimethoprim-sulfamethoxazole (also known as co-trimoxazole, TMPS) to treat Klebsiella pneumoniae (Kp)-K. pneumoniae carbapenemase (KPC) infections. METHODS: Clinical data of patients with a TMPS-susceptible Kp-KPC infection were collected as a case series. RESULTS: We report clinical outcomes and tolerability for 14 patients infected by Kp-KPC strains susceptible to TMPS, including three bloodstream infections...
February 9, 2017: Infection
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