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https://www.readbyqxmd.com/read/28637339/emergence-of-ceftazidime-avibactam-non-susceptibility-in-an-mdr-klebsiella-pneumoniae-isolate
#1
Anna Both, Henning Büttner, Jiabin Huang, Markus Perbandt, Cristina Belmar Campos, Martin Christner, Florian P Maurer, Stefan Kluge, Christina König, Martin Aepfelbacher, Dominic Wichmann, Holger Rohde
Background: Avibactam is a novel broad-range β-lactamase inhibitor active against Ambler class A (including ESBL and KPC) and some Ambler class C and D (e.g. OXA-48) enzymes. We here report on the emergence of ceftazidime/avibactam resistance in clinical, multiresistant, OXA-48 and CTX-M-14-producing Klebsiella pneumoniae isolate DT12 during ceftazidime/avibactam treatment. Methods and results: Comparative whole-genome sequence analysis identified two SNPs in the CTX-M-14-encoding gene leading to two amino acid changes (P170S and T264I)...
June 16, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28614760/abundance-of-carbapenemase-genes-blakpc-blandm-and-blaoxa-48-in-wastewater-effluents-from-tunisian-hospitals
#2
Emna Nasri, Jessica Subirats, Alexandre Sànchez-Melsió, Hedi Ben Mansour, Carles M Borrego, José Luis Balcázar
Carbapenems are β-lactam antibiotics with a broad spectrum of activity and are usually considered the last resort for the treatment of severe infections caused by multidrug-resistant pathogens. The clinically most significant carbapenemases are KPC, NDM, and OXA-48-like enzymes, whose genes have been increasingly reported worldwide in members of the family Enterobacteriaceae. In this study, we quantified the abundance of these genes in wastewater effluents from different Tunisian hospitals. The blaNDM and blaOXA-48-like genes were detected at similar concentrations in all hospital wastewater effluents...
June 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28604100/molecular-epidemiology-of-carbapenem-resistant-acinetobacter-baumannii-in-greece-an-extended-review-2000-2015
#3
Theodoros Karampatakis, Charalampos Antachopoulos, Athanassios Tsakris, Emmanuel Roilides
Carbapenem-resistant Acinetobacter baumannii (CRAB) is endemic in Greece. CRAB initially emerged in 2000 and since then, carbapenemases still have a crucial role in CRAB appearance, except for a few cases resulting from efflux pump or outer-membrane protein mechanisms. OXA-type carbapenemases present the highest prevalence worldwide and bla OXA-23-like and bla OXA-58-like are the most important genes found; VIM-yielding CRAB have also been detected, while a single CRAB isolate producing NDM has quite recently emerged in Greece...
June 12, 2017: Future Microbiology
https://www.readbyqxmd.com/read/28572036/draft-genome-sequence-of-a-multidrug-resistant-oxa-23-producing-acinetobacter-baumannii-st191-clinical-isolate-from-china
#4
Juan Xu, Wenping Lin, Weixing Xi, Yingyu Yao
Acinetobacter baumannii has emerged worldwide as a dominant pathogen in nosocomial infections. In this study, we report the draft genome sequence of a clinical multidrug-resistant (MDR) A. baumannii ST191 (CC92) strain. Whole-genome sequencing of the isolate was performed using an Illumina HiSeq™ 2500 system, and bioinformatics analysis was also performed. The draft genome length was 4,259,210bp, harbouring 14 gene sequences relevant to antibiotic resistance. Antimicrobial susceptibility testing revealed that the isolate was resistant to all of the tested antibiotics except for tigecycline and colistin...
May 30, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28567057/molecular-study-of-acinetobacter-baumannii-isolates-for-metallo-%C3%AE-lactamases-and-extended-spectrum-%C3%AE-lactamases-genes-in-intensive-care-unit-mansoura-university-hospital-egypt
#5
Nashwa M Alkasaby, Maysaa El Sayed Zaki
Acinetobacter baumannii (A. baumannii) has been known as a causative pathogen of hospital acquired infections. The aim of this study is to examine the presence of A. baumannii among clinical isolates from intensive care unit (ICU) in Mansoura University Hospital (MUH), its antibiotic resistance pattern, and prevalence of antibiotic resistance genes metallo-β-lactamases (MBLs) and extended-spectrum-β-lactamases (ESBLs) among A. baumannii isolates. A. baumannii was identified by colony morphology, API 20E, and confirmed by detecting the bla OXA-51-like carbapenemase gene by PCR...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/28562751/carbapenem-resistant-acinetobacter-baumannii-contamination-in-an-intensive-care-unit
#6
Otávio Hallal Ferreira Raro, Stephanie Wagner Gallo, Carlos Alexandre Sanchez Ferreira, Sílvia Dias de Oliveira
INTRODUCTION: Acinetobacter baumannii is a major pathogen causing infections in intensive care units (ICUs). In this study, we aimed to evaluate the presence of A. baumannii in an ICU environment and gloves from ICU workers and to characterize the antimicrobial resistance of the isolates in comparison with those isolated from ICU patients at the same hospital. METHODS: ICU samples were collected from March to November 2010. Isolates biochemically characterized as Acinetobacter calcoaceticus-Acinetobacter baumannii complex were evaluated by PCR targeting the 16S rDNA and bla OXA-51 genes...
March 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28558660/pneumonia-caused-by-extensive-drug-resistant-acinetobacter-baumannii-among-hospitalized-patients-genetic-relationships-risk-factors-and-mortality
#7
Yu Jun Li, Chu Zhi Pan, Chang Quan Fang, Zhu Xiang Zhao, Hui Ling Chen, Peng Hao Guo, Zi Wen Zhao
BACKGROUND: The clonal spread of multiple drug-resistant Acinetobacter baumannii is an emerging problem in China. We analysed the molecular epidemiology of Acinetobacter baumanni isolates at three teaching hospitals and investigated the risk factors, clinical features, and outcomes of hospital-acquired pneumonia caused by extensive drug-resistant Acinetobacter baumannii (XDRAB) infection in Guangzhou, China. METHODS: Fifty-two A. baumannii isolates were collected...
May 30, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28550370/molecular-epidemiology-of-escherichia-coli-sequence-type-131-and-its-h30-h30-rx-subclones-recovered-from-extra-intestinal-infections-first-report-of-oxa-48-producing-st131-clone-from-iran
#8
Z Hojabri, M Mirmohammadkhani, F Kamali, K Ghassemi, S Taghavipour, O Pajand
Multidrug-resistant (MDR) O25b-ST131 clone of Escherichia coli is well established as a significant cause of extra-intestinal infections worldwide. However, there have been no studies about the prevalence of ST131 and its H30/H30Rx subclones from Iran. The prevalence of ST131 was 29.8% among phylogroups B2, D, and F of E.coli isolates recovered from extra-intestinal infections. Fifty-seven (90.4%) and six (9.6%) of isolates belonged to serogroups O25b and O16 respectively, and exhibited high rates of MDR (98...
May 27, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28535303/a-novel-goldnano-carb-test-for-rapid-phenotypic-detection-of-carbapenemases-particularly-oxa-type-in-enterobacteriaceae-pseudomonas-aeruginosa-and-acinetobacter-spp
#9
Arpasiri Srisrattakarn, Aroonlug Lulitanond, Chotechana Wilailuckana, Nicha Charoensri, Jureerut Daduang, Aroonwadee Chanawong
Objectives: To develop a simple gold nanoparticle (AuNP)-based colorimetric test, GoldNano Carb (GoldC), for detecting carbapenemase production in Gram-negative bacteria, compared with updated Carba NP (CNP) and CarbAcineto NP (CAcNP) tests by using PCR methods as gold standard. Methods: Ninety-nine carbapenemase-producing Enterobacteriaceae (CPE), Pseudomonas spp. and Acinetobacter spp. isolates and 89 non-CPE isolates were tested by the GoldC and CNP. Additionally, the CAcNP was performed in the Acinetobacter spp...
May 23, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28515629/microbial-competition-in-environmental-nosocomial-reservoirs-and-diffusion-capacity-of-oxa48-klebsiella-pneumoniae-potential-impact-on-patients-and-possible-control-methods
#10
REVIEW
R Herruzo, G Ruiz, M J Vizcaino, L Rivas, V Pérez-Blanco, M Sanchez
BACKGROUND: We have found clusters of Klebsiella pneumoniae with OXA48-carbepenemase cases in some hospital rooms, and decided to investigate whether bathroom siphons could be a reservoir for OXA48 bacteria, as occurs with K. oxytoca with other types of carbepenemases. METHODS: We evaluated the microbial competition between strains with OXA48 and VIM carbepenemases, in diluted nutrient-broth, on a slime germ-carrier. We compared the number of colonies at 5 and 10 days on the contaminated carriers with one or two strains...
March 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28513417/carriage-of-extended-spectrum-beta-lactamase-producing-enterobacteriaceae-in-hiv-infected-children-in-zimbabwe
#11
S M S Wilmore, K Kranzer, A Williams, B Makamure, A F Nhidza, J Mayini, T Bandason, J Metcalfe, M P Nicol, I Balakrishnan, M J Ellington, N Woodford, S Hopkins, T D McHugh, R A Ferrand
BACKGROUND: Antimicrobial resistance is an emerging global health issue. Data on the epidemiology of multidrug-resistant organisms are scarce for Africa, especially in HIV-infected individuals who often have frequent contact with healthcare. We investigated the prevalence of extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-E) carriage in stool among HIV-infected children attending an HIV outpatient department in Harare, Zimbabwe. METHODS: We recruited children who were stable on antiretroviral therapy (ART) attending a HIV clinic from August 2014 to June 2015...
May 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28495384/medicinal-chemistry-of-antischistosomal-drugs-praziquantel-and-oxamniquine
#12
REVIEW
Vinícius Barros Ribeiro da Silva, Bruna Rafaella Koresch Leiva Campos, Jamerson Ferreira de Oliveira, Jean-Luc Decout, Maria do Carmo Alves de Lima
Neglected tropical diseases (NTDs) are a group of diseases that, besides prevailing in poverty conditions, contribute to the maintenance of social inequality, being a strong barrier to a country development. Schistosomiasis, a NTD, is a tropical and subtropical disease caused by the trematode Schistosoma mansoni (Africa, Middle East, Caribbean, Brazil, Venezuela, Suriname), japonicum (China, Indonesia, the Philippines), mekongi (several districts of Cambodia and the Lao People's Democratic Republic), intercalatum and guianensis (areas of tropical rainforests in Central Africa) and hematobium (Middle East Africa, Corsica, France) whose adult forms inhabit the mesenteric vessels of the host, while the intermediate forms are found in the aquatic gastropod snails of the genus Biomphalaria...
July 1, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28486994/the-emergence-of-a-novel-sequence-type-of-mdr-acinetobacter-baumannii-from-the-intensive-care-unit-of-an-egyptian-tertiary-care-hospital
#13
Doaa Mohammad Ghaith, Mai Mahmoud Zafer, Mohamed Hamed Al-Agamy, Essam J Alyamani, Rayan Y Booq, Omar Almoazzamy
BACKGROUND AND AIM OF WORK: Acinetobacter baumannii is known for nosocomial outbreaks worldwide. In this study, we aimed to investigate the antibiotic susceptibility patterns and the clonal relationship of A. baumannii isolates from the intensive care unit (ICU) of an Egyptian hospital. METHODS: In the present study, 50 clinical isolates of multidrug resistant (MDR)-A. baumannii were obtained from patients admitted into the ICU from June to December 2015. All isolates were analyzed for antimicrobial susceptibilities...
May 10, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28485708/molecular-study-of-carbapenemase-genes-in-clinical-isolates-of-enterobacteriaceae-resistant-to-carbapenems-and-determining-their-clonal-relationship-using-pulsed-field-gel-electrophoresis
#14
Fereshteh Shahcheraghi, Mohammad Mehdi Aslani, Hassan Mahmoudi, Zahra Karimitabar, Hamid Solgi, Abbas Bahador, Mohammad Yousef Alikhani
PURPOSE: Enterobacteriaceae is a large family of Gram-negative bacteria that are considered as normal gut flora. They are the most common human pathogens. The main objective of this study was to investigate the carbapenemase genes in clinical isolates of Enterobacteriaceae resistant to carbapenem antibiotics and determine their clonal relationship using pulsed-field gel electrophoresis (PFGE). METHODOLOGY: In the present study, bacteria were isolated and identified via conventional biochemical tests and API 20NE...
May 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28475585/acinetobacter-baumannii-strains-isolated-from-patients-in-intensive-care-units-in-goi%C3%A3-nia-brazil-molecular-and-drug-susceptibility-profiles
#15
Suellen Rocha Araújo Castilho, Cássia Silva de Miranda Godoy, Adriana Oliveira Guilarde, Juliana Lamaro Cardoso, Maria Cláudia Porfirio André, Ana Paula Junqueira-Kipnis, André Kipnis
Resistance to antimicrobial agents is increasing worldwide and imposes significant life-threatening risks to several different populations, especially those in intensive care units (ICUs). Bacteria can quickly develop or acquire resistance to antimicrobial drugs, and combined with their intrinsic potential to cause disease in humans, these bacteria can become deadly. Among Gram-negative bacteria, Acinetobacter baumannii is notorious as a frequent opportunistic pathogen associated with critically ill patients, and understanding the genetic basis of A...
2017: PloS One
https://www.readbyqxmd.com/read/28470337/synergistic-activity-of-synthetic-n-terminal-peptide-of-human-lactoferrin-in-combination-with-various-antibiotics-against-carbapenem-resistant-klebsiella-pneumoniae-strains
#16
P Morici, W Florio, C Rizzato, E Ghelardi, A Tavanti, G M Rossolini, A Lupetti
The spread of multi-drug resistant (MDR) Klebsiella pneumoniae strains producing carbapenemases points to a pressing need for new antibacterial agents. To this end, the in-vitro antibacterial activity of a synthetic N-terminal peptide of human lactoferrin, further referred to as hLF1-11, was evaluated against K. pneumoniae strains harboring different carbapenemase genes (i.e. OXA-48, KPC-2, KPC-3, VIM-1), with different susceptibility to colistin and other antibiotics, alone or in combination with conventional antibiotics (gentamicin, tigecycline, rifampicin, clindamycin, and clarithromycin)...
May 3, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28461314/ndm-5-and-oxa-181-beta-lactamases-a-significant-threat-continues-to-spread-in-the-americas
#17
Laura J Rojas, Andrea M Hujer, Susan D Rudin, Meredith S Wright, T Nicholas Domitrovic, Steven H Marshall, Kristine M Hujer, Sandra S Richter, Eric Cober, Federico Perez, Mark D Adams, David van Duin, Robert A Bonomo
Among Gram-negative bacteria, carbapenem resistant (CR) infections pose a serious and life threatening challenge. Here, the CRACKLE network reports a sentinel detection and characterization of a CR Klebsiella pneumoniae ST147 isolate harboring blaNDM-5 and blaOXA-181, from a young man who underwent abdominal surgery in India. blaNDM-5 was located on an IncFII plasmid of ≈ 90Kb, while blaOXA-181 was chromosomally encoded. Resistome and genome analysis demonstrated multiple copies of the transposable element IS26 and a "hotspot region" in the IncFII plasmid...
May 1, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28458051/emergence-and-nosocomial-spread-of-carbapenem-resistant-oxa-232-producing-klebsiella-pneumoniae-in-brunei-darussalam
#18
Muhd Haziq Fikry Abdul Momin, Apostolos Liakopoulos, Lynette M Phee, David W Wareham
OBJECTIVES: Carbapenem-resistant Enterobacteriaceae (CRE) are identified as a major global health concern. The success of CRE is facilitated by the emergence, acquisition and spread of successful clones carrying plasmid-encoded resistance genes. In this study, an outbreak of carbapenem-resistant Klebsiella pneumoniae (CRKP) infections in patients hospitalised in Brunei Darussalam was investigated. METHODS: Over a 3-month period (May-July 2015), five multidrug-resistant K...
June 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28457900/correlation-between-ability-of-biofilm-formation-with-their-responsible-genes-and-mdr-patterns-in-clinical-and-environmental-acinetobacter-baumannii-isolates
#19
Ali Mohammadi Bardbari, Mohammad Reza Arabestani, Manoochehr Karami, Fariba Keramat, Mohammad Yousef Alikhani, Kamran Pooshang Bagheri
Acinetobacter baumannii potential to form biofilm and exhibit multiple antibiotic resistances may be responsible in its survival in hospital environment. Accordingly, our study was aimed to determine the correlation between ability of biofilm formation and the frequency of biofilm related genes with antibiotic resistance phenotypes, and also the categorization of their patterns in clinical and environmental isolates. A total of 75 clinical and 32 environmental strains of the A. baumannii were collected and identified via API 20NE...
July 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28444620/environmental-pollution-with-antimicrobial-agents-from-bulk-drug-manufacturing-industries-in-hyderabad-south-india-is-associated-with-dissemination-of-extended-spectrum-beta-lactamase-and-carbapenemase-producing-pathogens
#20
Christoph Lübbert, Christian Baars, Anil Dayakar, Norman Lippmann, Arne C Rodloff, Martina Kinzig, Fritz Sörgel
PURPOSE: High antibiotic and antifungal concentrations in wastewater from anti-infective drug production may exert selection pressure for multidrug-resistant (MDR) pathogens. We investigated the environmental presence of active pharmaceutical ingredients and their association with MDR Gram-negative bacteria in Hyderabad, South India, a major production area for the global bulk drug market. METHODS: From Nov 19 to 28, 2016, water samples were collected from the direct environment of bulk drug manufacturing facilities, the vicinity of two sewage treatment plants, the Musi River, and habitats in Hyderabad and nearby villages...
April 26, 2017: Infection
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