Browsing by Author "Kristo, I."
Now showing items 1-20 of 20
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Association of biofilm formation and methicillin-resistance with accessory gene regulator (agr) loci in Greek Staphylococcus aureus clones
Ikonomidis, A.; Vasdeki, A.; Kristo, I.; Maniatis, A. N.; Tsakris, A.; Malizos, K. N.; Pournaras, S. (2009)Pathogenicity of Staphylococcus aureus is coordinated by the accessory gene regulator (agr) system. Previous studies suggested that agr Group 11 methicillin-resistant S. aureus (MRSA), a polymorphism that has been associated ... -
A cautionary case of microbial solidarity: concurrent isolation of VIM-1-producing Klebsiella pneumoniae, Escherichia coli and Enterobacter cloacae from an infected wound
Sianou, E.; Kristo, I.; Petridis, M.; Apostolidis, K.; Meletis, G.; Miyakis, S.; Sofianou, D. (2012) -
Changes in ghrelin and adipocytokines levels in ovariectomized premenopausal women treated with estrogen
Dafopoulos, K.; Chalvatzas, N.; Kristo, I.; Kallitsaris, A.; Mademtzis, I.; Messinis, I. E. (2006) -
Characteristics of Meropenem Heteroresistance in Klebsiella pneumoniae Carbapenemase (KPC)-Producing Clinical Isolates of K-pneumoniae
Pournaras, S.; Kristo, I.; Vrioni, G.; Ikonomidis, A.; Poulou, A.; Petropoulou, D.; Tsakris, A. (2010)Meropenem heteroresistance was investigated in six apparently meropenem-susceptible, Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (KPC-KP) clinical isolates, compared with that in carbapenemase-negative, ... -
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 ... -
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 ... -
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 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 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. ... -
Dissemination of Clinical Isolates of Klebsiella oxytoca Harboring CMY-31, VIM-1, and a New OXY-2-Type Variant in the Community
Tsakris, A.; Poulou, A.; Markou, F.; Pitiriga, V.; Piperaki, E. T.; Kristo, I.; Pournaras, S. (2011)The aim of the present study was to investigate the epidemiological link of multidrug-resistant Klebsiella oxytoca isolates causing community-onset infections among patients attending our outpatient department and to ... -
Effect of induced follicular phase estradiol concentrations on ghrelin and adipocytokines levels in postmenopausal women
Dafopoulos, K.; Chalvatzas, N.; Kristo, I.; Kallitsaris, A.; Lialios, G.; Messinis, I. E. (2006) -
Evaluation of Boronic Acid Disk Tests for Differentiating KPC-Possessing Klebsiella pneumoniae Isolates in the Clinical Laboratory
Tsakris, A.; Kristo, I.; Poulou, A.; Themeli-Digalaki, K.; Ikonomidis, A.; Petropoulou, D.; Pournaras, S.; Sofianou, D. (2009)The worldwide increase in the occurrence and dissemination of KPC beta-lactamases among gram-negative pathogens makes critical the early detection of these enzymes. Boronic acid disk tests using different antibiotic ... -
First occurrence of KPC-2-possessing Klebsiella pneumoniae in a Greek hospital and recommendation for detection with boronic acid disc tests
Tsakris, A.; Kristo, I.; Poulou, A.; Markou, F.; Ikonomidis, A.; Pournaras, S. (2008)To investigate the first KPC carbapenemase-producing Klebsiella pneumoniae isolate from a Greek hospital, including phenotypic methods to aid recognition of this resistance type. A carbapenem-resistant clinical isolate of ... -
Growth Retardation, Reduced Invasiveness, and Impaired Colistin-Mediated Cell Death Associated with Colistin Resistance Development in Acinetobacter baumannii
Pournaras, S.; Poulou, A.; Dafopoulou, K.; Chabane, Y. N.; Kristo, I.; Makris, D.; Hardouin, J.; Cosette, P.; Tsakris, A.; De, E. (2014)Two colistin-susceptible/colistin-resistant (Col(s)/Col(r)) pairs of Acinetobacter baumannii strains assigned to international clone 2, which is prevalent worldwide, were sequentially recovered from two patients after ... -
Intensive care unit dissemination of multiple clones of linezolid-resistant Enterococcus faecalis and Enterococcus faecium
Ntokou, E.; Stathopoulos, C.; Kristo, I.; Dimitroulia, E.; Labrou, M.; Vasdeki, A.; Makris, D.; Zakynthinos, E.; Tsakris, A.; Pournaras, S. (2012)Outbreaks caused by linezolid-resistant (LR) enterococci remain rare. We report the epidemiological and molecular characteristics of the multiclonal dissemination of LR enterococci in the intensive care unit (ICU) of a ... -
Large Dissemination of VIM-2-Metallo-beta-Lactamase-Producing Pseudomonas aeruginosa Strains Causing Health Care-Associated Community-Onset Infections
Tsakris, A.; Poulou, A.; Kristo, I.; Pittaras, T.; Spanakis, N.; Pournaras, S.; Markou, F. (2009)During a 3-year period (May 2005 to April 2008), a series of 45 outpatients presented with community-onset urinary tract infections due to carbapenem-resistant Pseudomonas aeruginosa isolates. Forty of them had a history ... -
Molecular cloning and biochemical characterization of VIM-12, a novel hybrid VIM-1/VIM-2 metallo-beta-lactamase from a Klebsiella pneumoniae clinical isolate, reveal atypical substrate specificity
Kontou, M.; Pournaras, S.; Kristo, I.; Ikonomidis, A.; Maniatis, A. N.; Stathopoulos, C. (2007)Metallo-beta-lactamases (MBLs) are considered an emerging family of Zn2+-dependent enzymes that significantly contribute to the resistance of many nosocomial pathogens against beta-lactam antimicrobials. Since these ... -
Molecular cloning and biochemical characterization of VIM-12, a novel hybrid VIM-1/VIM-2 metallo-beta-lactamase from a Klebsiella pneumoniae clinical isolate, reveals atypical substrate specificity
Kontou, M.; Pournaras, S.; Kristo, I.; Ikonomidis, A.; Maniatis, A. N.; Stathopoulos, C. (2008) -
Outbreaks in distinct regions due to a single Klebsiella pneumoniae clone carrying a bla(VIM-1) metallo-beta-lactamase gene
Ikonomidis, A.; Tokatlidou, D.; Kristo, I.; Sofianou, D.; Tsakris, A.; Mantzana, P.; Pournaras, S.; Maniatis, A. N. (2005)From December 2004 to March 2005, 27 Klebsiella pneumoniae clinical isolates that were positive by the imipenem-EDTA double-disk synergy test and that exhibited a single macrorestriction pattern were recovered in two ... -
Susceptibility patterns to extended-spectrum cephalosporins among Enterobacteriaceae harbouring extended-spectrum beta-lactamases using the updated Clinical and Laboratory Standards Institute interpretive criteria
Kristo, I.; Pitiriga, V.; Poulou, A.; Zarkotou, O.; Kimouli, M.; Pournaras, S.; Tsakris, A. (2013)We examined the effect of applying the updated 2010 Clinical and Laboratory Standards Institute (CLSI) susceptibility breakpoints for extended-spectrum cephalosporins (ESCs) to detect extended-spectrum beta-lactamase ...