Πλοήγηση ανά Συγγραφέα "Pournaras, S."
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Clonal spread of KPC-2 carbapenemase-producing Klebsiella pneumoniae strains in Greece
Pournaras, S.; Protonotariou, E.; Voulgari, E.; Kristo, I.; Dimitroulia, E.; Vitti, D.; Tsalidou, M.; Maniatis, A. N.; Tsakris, A.; Sofianou, D. (2009)KPC-possessing Klebsiella pneumoniae have been found to be widespread in several regions but are still rarely detected in Europe. We describe the characteristics of an outbreak caused by KPC producers in a tertiary care ... -
Clusters of imipenem-resistant Acinetobacter baumannii clones producing different carbapenemases in an intensive care unit
Tsakris, A.; Ikonomidis, A.; Poulou, A.; Spanakis, N.; Vrizas, D.; Diomidous, M.; Pournaras, S.; Markou, F. (2008)During a 2-year period (April 2005-March 2007), 31 intensive care unit (ICU) patients in a Greek hospital were infected or colonised with imipenem-resistant isolates of Acinetobacter baumannii. Twelve patients died, with ... -
A Combined Disk Test for Direct Differentiation of Carbapenemase-Producing Enterobacteriaceae in Surveillance Rectal Swabs
Pournaras, S.; Zarkotou, O.; Poulou, A.; Kristo, I.; Vrioni, G.; Themeli-Digalaki, K.; Tsakris, A. (2013)Carbapenemase-producing Enterobacteriaceae (CPE) are rapidly spreading worldwide. Early detection of fecal CPE carriers is essential for effective infection control. Here, we evaluated the performance of a meropenem combined ... -
Comparative evaluation of colistin susceptibility testing methods among carbapenem-nonsusceptible Klebsiella pneumoniae and Acinetobacter baumannii clinical isolates
Dafopoulou, K.; Zarkotou, O.; Dimitroulia, E.; Hadjichristodoulou, C.; Gennimata, V.; Pournaras, S.; Tsakris, A. (2015)We compared six colistin susceptibility testing (ST) methods on 61 carbapenem-nonsusceptible Klebsiella pneumoniae (n = 41) and Acinetobacter baumannii (n = 20) clinical isolates with provisionally elevated colistin MICs ... -
Comparative Evaluation of Combined-Disk Tests Using Different Boronic Acid Compounds for Detection of Klebsiella pneumoniae Carbapenemase-Producing Enterobacteriaceae Clinical Isolates
Tsakris, A.; Themeli-Digalaki, K.; Poulou, A.; Vrioni, G.; Voulgari, E.; Koumaki, V.; Agodi, A.; Pournaras, S.; Sofianou, D. (2011)The accurate phenotypic detection of Klebsiella pneumoniae carbapenemase (KPC)-producing Enterobacteriaceae is an increasing necessity worldwide. We evaluated the performance of boronic acid combined-disk tests using as ... -
Comparative Evaluation of Tigecycline Susceptibility Testing Methods for Expanded-Spectrum Cephalosporin- and Carbapenem-Resistant Gram-Negative Pathogens
Zarkotou, O.; Pournaras, S.; Altouvas, G.; Pitiriga, V.; Tziraki, M.; Mamali, V.; Themeli-Digalaki, K.; Tsakris, A. (2012)We evaluated the Vitek2, Etest, and MIC Test Strip (MTS) methods of tigecycline susceptibility testing with 241 expanded-spectrum cephalosporin-resistant and/or carbapenem-resistant Enterobacteriaceae and Acinetobacter ... -
Control of multi-drug resistance
Pournaras, S. (2012)During the last decade, both Gram-positive and Gram-negative bacteria that are resistant to most or all available antibacterial classes are increasingly prevalent in the nosocomial environment, particularly among ... -
Cross-transmission of multidrug-resistant Acinetobacter baumannii clonal strains causing episodes of sepsis in a trauma intensive care unit
Markogiannakis, A.; Fildisis, G.; Tsiplakou, S.; Ikonomidis, A.; Koutsoukou, A.; Pournaras, S.; Manolis, E. N.; Baltopoulos, G.; Tsakris, A. (2008)OBJECTIVE. To investigate the mode of transmission of imipenem-resistant Acinetobacter baumannii strains causing episodes of sepsis. SETTING. A 7-bed trauma intensive care unit (ICU) in an orthopedic hospital in Greece. ... -
CTX-M enzymes are the most common extended-spectrum beta-lactamases among Escherichia coli in a tertiary Greek hospital
Pournaras, S.; Ikonomidis, A.; Kristo, L.; Tsakris, A.; Maniatis, A. N. (2004) -
CTX-M-1 extended-spectrum beta-lactamase-producing Proteus mirabilis in Greece
Karapavlidou, P.; Sofianou, D.; Manolis, E. N.; Pournaras, S.; Tsakris, A. (2005)To examine the dissemination of CTX-M-type extended-spectrum beta-lactamases (ESBLs) in clinical isolates of Proteus mirabilis, 91 nonrepetitive ESBL-producing P. mirabilis were collected from infected patients in a tertiary ... -
CTX-M-type β-lactamases affect community Escherichia coli treatment, Greece [1]
Pournaras, S.; Ikonomidis, A.; Sofianou, D.; Tsakris, A.; Maniatis, A. N. (2004) -
Defining Fractional Inhibitory Concentration Index Cutoffs for Additive Interactions Based on Self-Drug Additive Combinations, Monte Carlo Simulation Analysis, and In Vitro-In Vivo Correlation Data for Antifungal Drug Combinations against Aspergillus fumigatus
Meletiadis, J.; Pournaras, S.; Roilides, E.; Walsh, T. J. (2010)The fractional inhibitory concentration (FIC) index range of 0.5 to 4 that is commonly used to define additivity results in no interactions in most combination studies of antifungal agents. These results may differ from ... -
Detection of a novel variant bla(CTX-M-3) extended spectrum beta-lactamase gene in a community-acquired Escherichia coli isolate
Pournaras, S.; Tsakris, A.; Ikonomidis, A.; Markogiannakis, A.; Kristo, I.; Maniatis, A. N. (2006)A highly cefotaxime- and cefepime-resistant but ceftazidime-sensitive Escherichia coli isolate was recovered from a community-acquired urinary infection of a Greek patient. Susceptibility testing, transfer assays, plasmid ... -
Detection of a phylogenetically distinct IMP-type metallo-beta-lactamase, IMP-35, in a CC235 Pseudomonas aeruginosa from the Dutch-German border region (Euregio)
Pournaras, S.; Kock, R.; Mossialos, D.; Mellmann, A.; Sakellaris, V.; Stathopoulos, C.; Friedrich, A. W.; Tsakris, A. (2013)To characterize a highly divergent IMP-type metallo--lactamase (MBL) variant detected in a multidrug-resistant Pseudomonas aeruginosa clinical isolate. P. aeruginosa isolate 1876 was recovered from an anal swab of an ... -
Detection of a variant CTX-M3 extended spectrum beta-lactamase gene, in a community-acquired strain of Escherichia coli
Pournaras, S.; Kristo, I.; Tsakris, A.; Maniatis, A. N. (2004) -
Detection of mutations in the FemXAB protein family in oxacillin-susceptible mecA-positive Staphylococcus aureus clinical isolates
Giannouli, S.; Labrou, M.; Kyritsis, A.; Ikonomidis, A.; Pournaras, S.; Stathopoulos, C.; Tsakris, A. (2010)Methicillin-resistant Staphylococcus aureus (MRSA) strains that express the mecA gene but are oxacillin susceptible (OS-MRSA; oxacillin MIC < 2 mg/L) are increasingly reported. To gain molecular and functional insights on ... -
Detection of the new metallo-beta-lactamase VIM-19 along with KPC-2, CMY-2 and CTX-M-15 in Klebsiella pneumoniae
Pournaras, S.; Poulou, A.; Voulgari, E.; Vrioni, G.; Kristo, I.; Tsakris, A. (2010)To report the identification of the metallo-beta-lactamase (MBL) variant VIM-19 in a Klebsiella pneumoniae clinical strain co-producing KPC-2 carbapenemase, CMY-2 cephalosporinase and CTX-M-15 extended-spectrum beta-lactamase. ... -
Differences in biofilm formation and virulence factors between clinical and fecal enterococcal isolates of human and animal origin
Tsikrikonis, G.; Maniatis, A. N.; Labrou, M.; Ntokou, E.; Michail, G.; Daponte, A.; Stathopoulos, C.; Tsakris, A.; Pournaras, S. (2012)The present study investigated the possible correlation between carriage of the virulence genes esp and fsrb, production of hemolysin and gelatinase and biofilm formation in human vs. animal enterococcal isolates. A ... -
Differential fungicidal activities of amphotericin B and voriconazole against Aspergillus species determined by microbroth methodology
Meletiadis, J.; Antachopoulos, C.; Stergiopoulou, T.; Pournaras, S.; Roilides, E.; Walsh, T. J. (2007)Antifungal agents may differ in their fungicidal activities against Aspergillus spp. In order to compare the fungicidal activities of voriconazole and amphotericin B against 40 isolates of Aspergillus fumigatus, A. flavus, ... -
Discordance of meropenem versus imipenem activity against Acinetobacter baumannii
Ikonomidis, A.; Pournaras, S.; Maniatis, A. N.; Legakis, N. J.; Tsakris, A. (2006)