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https://www.readbyqxmd.com/read/29776363/rapid-detection-of-carbapenemase-activity-of-enterobacteriaceae-isolated-from-positive-blood-cultures-by-maldi-tof-ms
#1
Jiajia Yu, Jingxian Liu, Yuanrui Li, Jing Yu, Weinan Zhu, Ying Liu, Lisong Shen
BACKGROUND: Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) has been proved to be a useful tool for identification of pathogens directly isolated from blood cultures in clinical microbiology laboratories. β-Lactam antibiotics are commonly used for treatment of bloodstream infections caused by Enterobacteriaceae strains, and carbapenem is the superlative class of β-lactam antibiotics. Since the carbapenem resistance rate of Enterobacteriaceae strains raised year by year, efficient detection of carbapenemase activity and timely delivery of carbapenem susceptibility reports of Enterobacteriaceae strains isolated from blood cultures is important for clinicians...
May 18, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29775789/e-coli-encoding-blandm-5-associated-with-community-acquired-uti-cases-with-unusual-mic-creep-like-phenomenon-against-imipenem
#2
Varsha Rani Gajamer, Amitabha Bhattacharjee, Deepjyoti Paul, Chandrayee Deshamukhya, Ashish Kr Singh, Nilu Pradhan, Hare Krishna Tiwari
OBJECTIVES: Carbapenemase-producing Escherichia coli are of major clinical concern. The present study aimed to identify NDM-5 producing E.coli associated with community-acquired urinary tract infection, co-harboring ESBL genes and a pattern of imipenem MIC creep. METHODS: A total of 973 urine samples were collected from females of age between 18-49 diagnosed with UTI. Isolates were identified by standard microbiological procedures. Presence of blaNDM and ESBL genes was determined by PCR assay and sequencing...
May 15, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29774531/ertapenem-a-potent-treatment-for-clinical-and-quality-of-life-improvement-in-patients-with-hidradenitis-suppurativa
#3
Taylor L Braunberger, Nathan T Nartker, Cynthia L Nicholson, Amanda F Nahhas, Angela Parks-Miller, Zachary Hanna, Rachna Jayaprakash, Mayur S Ramesh, Pranita V Rambhatla, Iltefat H Hamzavi
BACKGROUND: A paucity of knowledge exists regarding the use of ertapenem in hidradenitis suppurativa. Our retrospective chart review and telephone interview aims to investigate the utility of intravenous ertapenem in severe, refractory hidradenitis suppurativa. METHODS: This retrospective chart review and telephone interview included patients with severe, refractory hidradenitis suppurativa treated with intravenous ertapenem between March 2013 and December 2016...
May 17, 2018: International Journal of Dermatology
https://www.readbyqxmd.com/read/29769274/a-comparative-evaluation-of-four-phenotypic-methods-for-detection-of-class-a-and-b-carbapenemase-producing-enterobacteriaceae-in-china
#4
Menglan Zhou, Danchen Wang, Timothy Kudinha, Qiwen Yang, Shuying Yu, Ying-Chun Xu
Objectives: To evaluate the performance of four phenotypic methods in the detection of carbapenemase-producing Enterobacteriaceae (CPE) in China. Methods: We evaluated the performance of four carbapenemase detection methods, the modified Hodge test (MHT), Carba NP test, meropenem hydrolysis assay (MHA) with 1 and 2-hour incubation, and modified carbapenem inactivation method (mCIM) with meropenem, imipenem, and ertapenem, on 342 carbapenem-resistant Enterobacteriaceae (CRE) in China. Polymerase chain reaction was used as the gold standard...
May 16, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29763630/clinical-and-molecular-epidemiologic-characteristics-of-carbapenem-resistant-klebsiella-pneumoniae-infection-colonization-among-neonates-in-china
#5
Dandan Yin, Lei Zhang, Aimin Wang, Leiyan He, Yun Cao, Fupin Hu, Chuanqing Wang
BACKGROUND: The spread of carbapenem-resistant Klebsiella pneumoniae (CR-KPN) is a major concern, but data on CR-KPN infection/colonization in paediatric populations are limited. AIM: This study aimed to analyze epidemiologic and clinical characteristics, therapeutic options of CR-KPN infections in neonates in China. METHODS: A retrospective study was performed at the Children's Hospital of Fudan University, including 88 neonates with CR-KPN admitted between November 2015 and October 2016...
May 12, 2018: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29760145/-in-vitro-activity-of-imipenem-relebactam-and-ceftolozane-tazobactam-against-resistant-gram-negative-bacilli
#6
Suzannah M Schmidt-Malan, Avisya J Mishra, Ammara Mushtaq, Cassandra L Brinkman, Robin Patel
Understanding which antimicrobial agents are likely to be active against Gram-negative bacilli can guide selection of antimicrobials for empiric therapy as mechanistic-based (i.e., molecular) rapid diagnostics are adopted. Here, we determined the MICs of the novel β-lactam/β-lactamase inhibitor combination, imipenem-relebactam, along with ceftolozane-tazobactam, imipenem, ertapenem, meropenem, ceftriaxone, and cefepime, against 283 multidrug resistant isolates of Gram-negative bacilli. For isolates harboring bla KPC (n=111), the addition of relebactam to imipenem lowered the MIC50 /MIC90 from 16/>128 μg/ml for imipenem alone to 0...
May 14, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29760141/efficacy-of-daptomycin-monotherapy-and-in-combination-with-%C3%AE-lactams-for-daptomycin-susceptible-enterococcus-faecium-harboring-liasr-substitutions-influence-of-the-inoculum-effect
#7
Razieh Kebriaei, Seth A Rice, Kavindra V Singh, Kyle C Stamper, An Q Dinh, Rafael Rios, Lorena Diaz, Barbara E Murray, Jose M Munita, Truc T Tran, Cesar A Arias, Michael J Rybak
Enterococcus faecium that harbor LiaFSR substitutions but are phenotypically susceptible to daptomycin (DAP) by current breakpoints are problematic since predisposition to resistance may lead to therapeutic failure. Using a simulated endocardial vegetation (SEV) PK/PD model, we investigated DAP regimens (6, 8 and 10 mg/kg/day) as monotherapy and in combination with ampicillin (AMP), ceftaroline (CPT) or ertapenem (ERT) against E. faecium HOU503, a DAP-susceptible strain that harbors common LiaS and LiaR substitutions found in clinical isolates (T120S and W73C, respectively)...
May 14, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29754209/activity-of-ertapenem-against-enterobacteriaceae-in-seven-global-regions-smart-2012-2016
#8
Sibylle H Lob, Meredith A Hackel, Daryl J Hoban, Katherine Young, Mary R Motyl, Daniel F Sahm
Antimicrobial resistance among Enterobacteriaceae has been increasing globally especially due to extended-spectrum-β-lactamases (ESBLs), which typically necessitate the use of carbapenems for treatment of serious infections. Emerging carbapenem-resistant Enterobacteriaceae further complicate therapy. As part of the Study for Monitoring Antimicrobial Resistance Trends (SMART), this analysis examined the recent activity of a key carbapenem (ertapenem) and other important therapeutic options against Enterobacteriaceae...
May 12, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29751417/occurrence-and-characteristics-of-extended-spectrum-%C3%AE-lactamase-and-carbapenemase-producing-bacteria-from-hospital-effluents-in-singapore
#9
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/29728111/emergence-of-multidrug-resistant-providencia-rettgeri-isolates-co-producing-ndm-1-carbapenemase-and-per-1-extended-spectrum-%C3%AE-lactamase-causing-a-first-outbreak-in-korea
#10
Saeam Shin, Seok Hoon Jeong, Hyukmin Lee, Jun Sung Hong, Min-Jeong Park, Wonkeun Song
BACKGROUND: Nosocomial outbreak due to carbapenem-resistant Enterobacteriaceae has become serious challenge to patient treatment and infection control. We describe an outbreak due to a multidrug-resistant Providencia rettgeri from January 2016 to January 2017 at a University Hospital in Seoul, Korea. METHODS: A total of eight non-duplicate P. rettgeri isolates were discovered from urine samples from eight patients having a urinary catheter and admitted in a surgical intensive care unit...
May 5, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29692579/molecular-characterization-and-antimicrobial-susceptibility-profile-of-new-delhi-metallo-beta-lactamase-1-producing-escherichia-coli-among-hospitalized-patients
#11
Anjali Agarwal, Jyoti Srivastava, Ujjwal Maheshwari, Mohd Iftikhar
BACKGROUND: Carbapenemase-producing microorganisms are becoming a major concern among hospital-acquired infections. There is also increased multidrug resistance seen among these isolates. AIMS: We have conducted this study to determine the prevalence of New Delhi metallo-beta-lactamase-1 (NDM-1) gene-producing Escherichia coli among hospitalized patients in a tertiary care hospital in Northern India. SETTINGS AND DESIGN: The study was conducted in the Department of Microbiology with the tertiary care hospital settings...
April 2018: Journal of Laboratory Physicians
https://www.readbyqxmd.com/read/29689301/distinct-consequences-of-amoxicillin-and-ertapenem-exposure-in-the-porcine-gut-microbiome
#12
Sheila Connelly, Poorani Subramanian, Nur A Hasan, Rita R Colwell, Michael Kaleko
The gut microbiome influences many, if not all, aspects of human health. Antibiotics, while lifesaving, have the unintended consequence of killing commensal microbiota inhabiting the gastrointestinal (GI) tract, which can lead to overgrowth of opportunistic pathogens such as Clostridium difficile and emergence of antibiotic-resistant organisms. Here, porcine models were developed to evaluate changes to the gut microbiome caused by two distinct types of beta-lactam antibiotics delivered via common administration routes, oral amoxicillin and intravenous ertapenem...
April 21, 2018: Anaerobe
https://www.readbyqxmd.com/read/29642831/-identification-of-anaerobic-gram-negative-bacilli-isolated-from-various-clinical-specimens-and-determination-of-antibiotic-resistance-profiles-with-e-test-methods
#13
Cengiz Demir, Recep Keşli
The aim of this study was to identify gram-negative anaerobic bacilli isolated from various clinical specimens that were obtained from patients with suspected anaerobic infections and to determine the antibiotic resistance profiles by using the antibiotic concentration gradient method. The study was performed in Afyon Kocatepe University Ahmet Necdet Sezer Research and Practice Hospital, Medical Microbiology Laboratory between 1 November 2014 and 30 October 2015. Two hundred and seventyeight clinical specimens accepted for anaerobic culture were enrolled in the study...
January 2018: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/29642825/-investigation-of-carbapenemase-genes-and-molecular-epidemiology-of-enterobacteriaceae-strains-isolated-between-2010-2014-in-a-university-hospitals
#14
Hüseyin Haydar Kutlu, Ebru Us, Alper Tekeli
The worldwide spread of carbapenemase producing Enterobacteriaceae isolates has become a major threat of public health. This worrisome situation leads the development of new methods for carbapenemase screening, detection, prevention of spread and epidemiological data collection as mandatory. In this study, it was aimed to investigate existence and distribution of carbapenemase-encoding genes (CEGs) among carbapenem-resistant Enterobacteriaceae isolated from various clinical samples in Ankara University Faculty of Medicine, Ibni Sina Hospital, Central Microbiology Laboratory between June 2010-May 2014 and detect their clonal relationship...
January 2018: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/29621592/role-of-association-of-ompk35-and-ompk36-alteration-and-bla-esbl-and-or-bla-ampc-in-conferring-carbapenem-resistance-among-non-producing-carbapenemase-klebsiella-pneumoniae
#15
Zaineb Hamzaoui, Alain Ocampo-Sosa, Marta Fernandez Martinez, Sarrah Landolsi, Sana Ferjani, Elaa Maamar, Mabrouka Saidani, Amine Slim, Luis Martinez-Martinez, Ilhem Boutiba-Ben Boubaker
In K. pneumoniae, the loss of the two major outer membrane porins (OMPs) OmpK35 and OmpK36 confers resistance to carbapenem in strains producing extended spectrum β-lactamases or plasmid-mediated AmpC-type β-lactamases. At Charles Nicolle hospital of Tunis, all carbapenem-resistant Enterobacteriaceae (CRE) were collected over a 6-year period. The aim of this work was to investigate the mechanisms responsible for carbapenem resistance in non-carbapenemase-producing K. pneumoniae (NCPK) strains. Among the 334 CRE collected strains between 2010 and 2015, 44 (13...
April 2, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29596032/occurrence-and-characterization-of-carbapenemase-producing-enterobacteriaceae-in-a-tunisian-hospital
#16
Rania Ben Helal, Raoudha Dziri, Meriem Chedly, Naouel Klibi, Farouk Barguellil, Mohamed Selim El Asli, Mohamed Ben Moussa
Carbapenem-resistant Enterobacteriaceae have become of particular concern, since they were quickly disseminated in various areas in the world. The aim of the study was to investigate the prevalence of carbapenemase production among clinical isolates of Enterobacteriaceae recovered from the Military Hospital of Tunisia. Bacterial isolates (n = 125) were recovered from patients in diverse services from March 2014 to February 2016 and identified by Vitek II Compact® . The multiplex PCR for blaVIM , blaIMP , blaNDM , blaKPC , and blaOXA-48 with subsequent amplicon detection by reverse hybridization was performed with the Hyplex SuperBug ID test system (AmplexDiagnostics GmbH, Gars-Bahnhof, Germany)...
March 29, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29582993/carbapenems-and-lipid-bilayers-localization-partitioning-and-energetics
#17
Adree Khondker, Dylan J Malenfant, Alexander K Dhaliwal, Maikel C Rheinstädter
Carbapenems are broad-spectrum antibiotics used today to treat otherwise antibiotic resistant bacteria. As their target transpeptidase is located within the periplasm of the Gram-negative bacteria, they can participate in nonspecific interactions between the inner leaflet of the outer membrane and the outer leaflet of the inner membrane. We, therefore, studied the interaction of the four most clinically relevant carbapenems, namely, imipenem, doripenem, ertapenem, and meropenem, with model phospholipid bilayers made of 1,2-dimyristoyl- sn-glycero-3-phosphocholine (DMPC) using molecular dynamics (MD) simulations and X-ray diffraction at low and high concentration of the drugs corresponding to 1 and 8 mol % (with respect to the number of membrane lipids)...
April 17, 2018: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29561258/in-vitro-evaluation-of-double-carbapenem-combinations-against-oxa-48-producing-klebsiella-pneumoniae-isolates-using-time-kill-studies
#18
Irene Galani, Konstantina Nafplioti, Marianthi Chatzikonstantinou, Maria Souli
PURPOSE: The aim of this study was to evaluate the in vitro activity of double-carbapenem combinations against OXA-48-producing Klebsiella pneumoniae clinical isolates. METHODOLOGY: Double combinations of ertapenem, meropenem and imipenem were evaluated for synergy and bactericidal activity using the time-kill methodology. All antibiotics were tested at 10 mg l-1 and at a sub-inhibitory concentration of 0.5× minimum inhibitory concentration (MIC) for isolates with a carbapenem MIC≤8 mg l-1 ...
March 21, 2018: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29553324/phenotypic-and-genotypic-characterization-of-enterobacteriaceae-producing-oxacillinase-48-like-carbapenemases-united-states
#19
Joseph D Lutgring, Wenming Zhu, Tom J B de Man, Johannetsy J Avillan, Karen F Anderson, David R Lonsway, Lori A Rowe, Dhwani Batra, J Kamile Rasheed, Brandi M Limbago
Oxacillinase (OXA)-48-like carbapenemases remain relatively uncommon in the United States. We performed phenotypic and genotypic characterization of 30 Enterobacteriaceae producing OXA-48-like carbapenemases that were recovered from patients during 2010-2014. Isolates were collected from 12 states and not associated with outbreaks, although we could not exclude limited local transmission. The alleles β-lactamase OXA-181 (blaOXA-181 ) (43%), blaOXA-232 (33%), and blaOXA-48 (23%) were found. All isolates were resistant to ertapenem and showed positive results for the ertapenem and meropenem modified Hodge test and the modified carbapenem inactivation method; 73% showed a positive result for the Carba Nordmann-Poirel test...
April 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29541448/multidrug-resistant-gram-negative-bacterial-infections-in-a-teaching-hospital-in-ghana
#20
Nicholas Agyepong, Usha Govinden, Alex Owusu-Ofori, Sabiha Yusuf Essack
Background: Multidrug-resistant Gram-negative bacteria have emerged as major clinical and therapeutic dilemma in hospitals in Ghana.To describe the prevalence and profile of infections attributable to multidrug-resistant Gram-negative bacteria among patients at the Komfo Anokye Teaching Hospital in the Ashanti region of Ghana. Methods: Bacterial cultures were randomly selected from the microbiology laboratory from February to August, 2015. Bacterial identification and minimum inhibitory concentrations were conducted using standard microbiological techniques and the Vitek-2 automated system...
2018: Antimicrobial Resistance and Infection Control
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