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  1. Article: Efficacy of Fosfomycin-Containing Regimens for Treatment of Bacteremia Due to Pan-Drug Resistant

    Assimakopoulos, Stelios F / Karamouzos, Vassilis / Eleftheriotis, Gerasimos / Lagadinou, Maria / Bartzavali, Christina / Kolonitsiou, Fevronia / Paliogianni, Fotini / Fligou, Fotini / Marangos, Markos

    Pathogens (Basel, Switzerland)

    2023  Volume 12, Issue 2

    Abstract: Acinetobacter ... ...

    Abstract Acinetobacter baumannii
    Language English
    Publishing date 2023-02-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2695572-6
    ISSN 2076-0817
    ISSN 2076-0817
    DOI 10.3390/pathogens12020286
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  2. Article ; Online: Laboratory Surveillance of

    Spiliopoulou, Anastasia / Giannopoulou, Ioanna / Assimakopoulos, Stelios F / Jelastopulu, Eleni / Bartzavali, Christina / Marangos, Markos / Paliogianni, Fotini / Kolonitsiou, Fevronia

    Tropical medicine and infectious disease

    2023  Volume 8, Issue 11

    Abstract: Multidrug- ... ...

    Abstract Multidrug-resistant
    Language English
    Publishing date 2023-11-19
    Publishing country Switzerland
    Document type Journal Article
    ISSN 2414-6366
    ISSN (online) 2414-6366
    DOI 10.3390/tropicalmed8110503
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  3. Article: A Seven-Year Microbiological and Molecular Study of Bacteremias Due to Carbapenemase-Producing

    Papadimitriou-Olivgeris, Matthaios / Bartzavali, Christina / Karachalias, Eleftherios / Spiliopoulou, Anastasia / Tsiata, Ekaterini / Siakallis, Georgios / Assimakopoulos, Stelios F / Kolonitsiou, Fevronia / Marangos, Markos

    Antibiotics (Basel, Switzerland)

    2022  Volume 11, Issue 10

    Abstract: Background: Ceftazidime/avibactam (CZA) is a new option for the treatment of KPC-producing Klebsiella pneumoniae. The aim of this study was to determine resistance patterns and carbapenemase genes among K. pneumoniae (CP-Kp) bacteremic isolates before ... ...

    Abstract Background: Ceftazidime/avibactam (CZA) is a new option for the treatment of KPC-producing Klebsiella pneumoniae. The aim of this study was to determine resistance patterns and carbapenemase genes among K. pneumoniae (CP-Kp) bacteremic isolates before and after CZA introduction. Methods: K. pneumoniae from blood cultures of patients being treated in a Greek university hospital during 2015−21 were included. PCR for blaKPC, blaVIM, blaNDM and blaOXA-48 genes was performed. Results: Among 912 K. pneumoniae bacteremias: 725 (79.5%) were due to carbapenemase-producing isolates; 488 (67.3%) carried blaKPC; 108 (14.9%) blaVIM; 100 (13.8%) blaNDM; and 29 (4%) carried a combination of blaKPC, blaVIM or blaNDM. The incidence of CP-Kp bacteremias was 59 per 100,000 patient-days. The incidence of CP-Kp changed from a downward pre-CZA trend to an upward trend in the CZA period (p = 0.007). BSIs due to KPC-producing isolates showed a continuous downward trend in the pre-CZA and CZA periods (p = 0.067), while BSIs due to isolates carrying blaVIM or blaNDM changed from a downward trend in the pre-CZA to an upward trend in the CZA period (p < 0.001). Conclusions: An abrupt change in the epidemiology of CP-Kp was observed in 2018, due to the re-emergence of VIM-producing isolates after the suppression of KPC-producing ones via the use of CZA.
    Language English
    Publishing date 2022-10-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2681345-2
    ISSN 2079-6382
    ISSN 2079-6382
    DOI 10.3390/antibiotics11101414
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  4. Article ; Online: Increased incidence of candidemia in critically ill patients during the Coronavirus Disease 2019 (COVID-19) pandemic.

    Papadimitriou-Olivgeris, Matthaios / Kolonitsiou, Fevronia / Kefala, Sotiria / Spiliopoulou, Anastasia / Aretha, Diamanto / Bartzavali, Christina / Siapika, Argyro / Marangos, Markos / Fligou, Fotini

    The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases

    2022  Volume 26, Issue 2, Page(s) 102353

    Abstract: Background: Patients with severe Coronavirus Disease 2019 (COVID-19) are treated with corticosteroids.: Aim: We aimed to evaluate the role of corticosteroid treatment in candidemia development during the COVID-19 pandemic.: Methods: This ... ...

    Abstract Background: Patients with severe Coronavirus Disease 2019 (COVID-19) are treated with corticosteroids.
    Aim: We aimed to evaluate the role of corticosteroid treatment in candidemia development during the COVID-19 pandemic.
    Methods: This retrospective study was conducted in a Greek ICU, from 2010 to August 2021, encompassing a pre-pandemic and a pandemic period (pandemic period: April 2020 to August 2021). All adult patients with candidemia were included.
    Results: During the study period, 3,572 patients were admitted to the ICU, 339 patients during the pandemic period, of whom 196 were SARS-CoV-2-positive. In total, 281 candidemia episodes were observed in 239 patients, 114 in the pandemic period. The majority of candidemias in both periods were catheter-related (161; 50.4%). The incidence of candidemia in the pre-pandemic period was 5.2 episodes per 100 admissions, while in the pandemic period was 33.6 (p < 0.001). In the pandemic period, the incidence among COVID-19 patients was 38.8 episodes per 100 admissions, while in patients without COVID-19 incidence was 26.6 (p = 0.019). Corticosteroid administration in both periods was not associated with increased candidemia incidence.
    Conclusions: A significant increase of candidemia incidence was observed during the pandemic period in patients with and without COVID-19. This increase cannot be solely attributed to immunosuppression (corticosteroids, tocilizumab) of severe COVID-19 patients, but also to increased workload of medical and nursing staff.
    MeSH term(s) Adrenal Cortex Hormones/adverse effects ; Adult ; COVID-19 ; Candidemia/epidemiology ; Critical Illness/epidemiology ; Humans ; Incidence ; Intensive Care Units ; Pandemics ; Retrospective Studies ; SARS-CoV-2
    Chemical Substances Adrenal Cortex Hormones
    Language English
    Publishing date 2022-04-25
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 2041400-6
    ISSN 1678-4391 ; 1413-8670
    ISSN (online) 1678-4391
    ISSN 1413-8670
    DOI 10.1016/j.bjid.2022.102353
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  5. Article: Mortality of Pandrug-Resistant

    Papadimitriou-Olivgeris, Matthaios / Bartzavali, Christina / Georgakopoulou, Alexandra / Kolonitsiou, Fevronia / Papamichail, Chrisavgi / Spiliopoulou, Iris / Christofidou, Myrto / Fligou, Fotini / Marangos, Markos

    Antibiotics (Basel, Switzerland)

    2021  Volume 10, Issue 1

    Abstract: Background: The increased frequency of bacteraemias caused by pandrug-resistant : Methods: Patients with monomicrobial bacteraemia due to PDR-Kp were included. : Results: Among 115 PDR-Kp bacteraemias, the majority of infections were primary ... ...

    Abstract Background: The increased frequency of bacteraemias caused by pandrug-resistant
    Methods: Patients with monomicrobial bacteraemia due to PDR-Kp were included.
    Results: Among 115 PDR-Kp bacteraemias, the majority of infections were primary bacteraemias (53; 46.1%), followed by catheter-related (35; 30.4%). All isolates were resistant to tested antimicrobials.
    Conclusions: Mortality of PDR-Kp bloodstream infections was high. Administration of at least three antimicrobials might be beneficial for infections in critically ill patients caused by such pathogens.
    Language English
    Publishing date 2021-01-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2681345-2
    ISSN 2079-6382
    ISSN 2079-6382
    DOI 10.3390/antibiotics10010076
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  6. Article ; Online: External validation of INCREMENT-CPE score in a retrospective cohort of carbapenemase-producing Klebsiella pneumoniae bloodstream infections in critically ill patients.

    Papadimitriou-Olivgeris, Matthaios / Bartzavali, Christina / Georgakopoulou, Alexandra / Kolonitsiou, Fevronia / Mplani, Virginia / Spiliopoulou, Iris / Christofidou, Myrto / Fligou, Fotini / Marangos, Markos

    Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

    2021  Volume 27, Issue 6, Page(s) 915.e1–915.e3

    Abstract: Objectives: Our aim was to validate the INCREMENT-CPE score (ICS) in patients hospitalized in the intensive care unit (ICU) with bacteraemia due to carbapenemase-producing Klebsiella pneumoniae (CP-Kp).: Methods: The study was conducted in the ICU of ...

    Abstract Objectives: Our aim was to validate the INCREMENT-CPE score (ICS) in patients hospitalized in the intensive care unit (ICU) with bacteraemia due to carbapenemase-producing Klebsiella pneumoniae (CP-Kp).
    Methods: The study was conducted in the ICU of the University General Hospital of Patras, Greece, during a 10-year period (2010-2019). Patients with monomicrobial bacteraemia due to CP-Kp were included. Primary outcome was 14-day mortality. MICs of meropenem, tigecycline, fosfomycin and ceftazidime/avibactam were determined by Etest, whereas for colistin the broth microdilution method was applied. PCR for bla
    Results: Among 384 CP-Kp bacteraemias, most were primary (166, 43.2%) followed by catheter-related (143, 37.2%). Most isolates carried bla
    Conclusions: ICS showed predictive efficacy similar to that of the SAPS II, SOFA and Pitt bacteraemia scores.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Bacteremia/drug therapy ; Bacteremia/microbiology ; Bacterial Proteins/genetics ; Bacterial Proteins/metabolism ; Carbapenems/pharmacology ; Cohort Studies ; Critical Illness ; Drug Resistance, Multiple, Bacterial ; Humans ; Klebsiella Infections/microbiology ; Klebsiella Infections/pathology ; Klebsiella pneumoniae/drug effects ; Klebsiella pneumoniae/enzymology ; Microbial Sensitivity Tests ; Reproducibility of Results ; Retrospective Studies ; Sepsis/microbiology ; Sepsis/pathology ; beta-Lactamases/genetics ; beta-Lactamases/metabolism
    Chemical Substances Anti-Bacterial Agents ; Bacterial Proteins ; Carbapenems ; beta-Lactamases (EC 3.5.2.6) ; carbapenemase (EC 3.5.2.6)
    Language English
    Publishing date 2021-01-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 1328418-6
    ISSN 1469-0691 ; 1470-9465 ; 1198-743X
    ISSN (online) 1469-0691
    ISSN 1470-9465 ; 1198-743X
    DOI 10.1016/j.cmi.2021.01.001
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  7. Article: Impact of Tigecycline's MIC in the Outcome of Critically Ill Patients with Carbapenemase-Producing

    Papadimitriou-Olivgeris, Matthaios / Bartzavali, Christina / Nikolopoulou, Alexandra / Kolonitsiou, Fevronia / Mplani, Virginia / Spiliopoulou, Iris / Christofidou, Myrto / Fligou, Fotini / Marangos, Markos

    Antibiotics (Basel, Switzerland)

    2020  Volume 9, Issue 11

    Abstract: Background: Tigecycline is a therapeutic option for carbapenemase-producing : Methods: Patients with monomicrobial bacteraemia due to CP-Kp that received appropriate targeted monotherapy or no appropriate treatment were included. Primary outcome was ... ...

    Abstract Background: Tigecycline is a therapeutic option for carbapenemase-producing
    Methods: Patients with monomicrobial bacteraemia due to CP-Kp that received appropriate targeted monotherapy or no appropriate treatment were included. Primary outcome was 30-day mortality. MICs of meropenem, tigecycline, and ceftazidime/avibactam were determined by Etest, whereas for colistin, the broth microdilution method was applied. PCR for
    Results: Among 302 CP-Kp bacteraemias, 32 isolates (10.6%) showed MICs of tigecycline ≤ 0.5 mg/L, whereas 177 (58.6%) showed MICs that were 0.75-2 mg/L. Colistin and aminoglycoside susceptibility was observed in 43.0% and 23.8% of isolates, respectively. The majority of isolates carried
    Conclusion: Tigecycline monotherapy was as efficacious as other antimicrobials in the treatment of bloodstream infections due to CP-Kp isolates with a tigecycline's MIC ≤ 0.5 mg/L.
    Language English
    Publishing date 2020-11-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2681345-2
    ISSN 2079-6382
    ISSN 2079-6382
    DOI 10.3390/antibiotics9110828
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  8. Article ; Online: Evaluation of a commercial PCR test for the diagnosis of dermatophyte nail infections.

    Spiliopoulou, Anastasia / Bartzavali, Christina / Jelastopulu, Eleni / Anastassiou, Evangelos D / Christofidou, Myrto

    Journal of medical microbiology

    2014  Volume 64, Issue Pt 1, Page(s) 25–31

    Abstract: Tinea unguium, known as onychomycosis, is a dermatophyte infection of nails with worldwide distribution. Conventional methods for detecting fungi in nail specimens are either non-specific (microscopy) or insensitive (culture). PCR has been used to ... ...

    Abstract Tinea unguium, known as onychomycosis, is a dermatophyte infection of nails with worldwide distribution. Conventional methods for detecting fungi in nail specimens are either non-specific (microscopy) or insensitive (culture). PCR has been used to improve sensitivity in detecting the causative fungi in nail specimens from patients with suspected onychomycosis. Results of a commercial multiplex PCR for the detection of dermatophytes, especially Trichophyton rubrum (the main dermatophyte implicated), as compared to conventional methods are presented. A total of 418 nail scrapings obtained from dermatological outpatients were handled in the Laboratory of Microbiology between May 2010 and May 2013. Among them, multiplex PCR detected 126 (30.1 %) dermatophyte-positive samples, whereas culture revealed 44 (10.5 %). Direct microscopy revealed 63 (15.1 %) positive specimens. T. rubrum was identified in 116 out of 126 (92 %) positive PCR samples and 40 out of 44 (91 %) dermatophyte-positive cultures. Implementation of PCR increased species-specific detection of dermatophytes by 21.1 %, leading to a threefold increase as compared to culture alone. Multiplex PCR offers a time-saving diagnostic tool for tinea unguium and augments laboratory assistance to clinical evaluation for proper treatment.
    MeSH term(s) Aged ; Aged, 80 and over ; Arthrodermataceae/classification ; Arthrodermataceae/genetics ; Arthrodermataceae/isolation & purification ; Female ; Humans ; Male ; Microbiological Techniques/methods ; Middle Aged ; Molecular Diagnostic Techniques/methods ; Multiplex Polymerase Chain Reaction/methods ; Mycology/methods ; Onychomycosis/diagnosis ; Onychomycosis/microbiology ; Sensitivity and Specificity
    Language English
    Publishing date 2014-11-23
    Publishing country England
    Document type Comparative Study ; Evaluation Study ; Journal Article
    ZDB-ID 218356-0
    ISSN 1473-5644 ; 0022-2615
    ISSN (online) 1473-5644
    ISSN 0022-2615
    DOI 10.1099/jmm.0.079962-0
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  9. Article ; Online: Reversal of carbapenemase-producing Klebsiella pneumoniae epidemiology from blaKPC- to blaVIM-harbouring isolates in a Greek ICU after introduction of ceftazidime/avibactam.

    Papadimitriou-Olivgeris, Matthaios / Bartzavali, Christina / Lambropoulou, Anastasia / Solomou, Anastasia / Tsiata, Ekaterini / Anastassiou, Evangelos D / Fligou, Fotini / Marangos, Markos / Spiliopoulou, Iris / Christofidou, Myrto

    The Journal of antimicrobial chemotherapy

    2019  Volume 74, Issue 7, Page(s) 2051–2054

    Abstract: Objectives: Our aim was to determine the epidemiology of bloodstream infections (BSIs) by carbapenemase-producing Klebsiella pneumoniae (CP-Kp) after the introduction of ceftazidime/avibactam in January 2018 among ICU patients.: Patients and methods: ...

    Abstract Objectives: Our aim was to determine the epidemiology of bloodstream infections (BSIs) by carbapenemase-producing Klebsiella pneumoniae (CP-Kp) after the introduction of ceftazidime/avibactam in January 2018 among ICU patients.
    Patients and methods: All patients hospitalized at the ICU of the University General Hospital of Patras, Greece with CP-Kp BSI during 2015-18 were included. MICs of meropenem, fosfomycin, tigecycline and ceftazidime/avibactam (only for isolates from 2018) were determined by Etest, whereas for colistin, the broth microdilution method was applied. All isolates were tested by PCR for the presence of blaKPC, blaVIM, blaNDM and blaOXA-48 genes.
    Results: Among 170 BSIs due to CP-Kp (2015-18), 132 (78%) were caused by isolates carrying blaKPC (4 ceftazidime/avibactam-resistant), 17 blaVIM (10%), 16 blaNDM (9%) and 5 carrying both blaKPC and blaVIM (3%). From 2015 to 2017 (125 BSIs), KPC-producing strains (110; 88%) predominated, followed by NDM-producing strains (15; 12%), whereas no VIM-producing strain was isolated. Among the 45 BSIs in 2018, 22 (49%) were due to isolates carrying blaKPC (4 ceftazidime/avibactam resistant), followed by 17 (38%) carrying blaVIM, 5 (11%) carrying both blaKPC and blaVIM, and 1 isolate carrying blaNDM (2%). MBLs were more frequent in 2018 compared with 2015-17 (51% versus 12%; P < 0.001). Multivariate analysis found that prior administration of ceftazidime/avibactam (P = 0.014; OR 16.7, 95% CI 1.8-158.6) was independently associated with the development of BSI due to ceftazidime/avibactam-resistant isolates.
    Conclusions: Widespread ceftazidime/avibactam use may lead to a change in the palette of carbapenemases by replacing KPC with MBL-producing isolates.
    MeSH term(s) Adult ; Aged ; Azabicyclo Compounds/pharmacology ; Azabicyclo Compounds/therapeutic use ; Bacteremia ; Bacterial Proteins/biosynthesis ; Bacterial Proteins/genetics ; Carbapenem-Resistant Enterobacteriaceae ; Ceftazidime/pharmacology ; Ceftazidime/therapeutic use ; Cross Infection ; Disease Susceptibility ; Drug Combinations ; Female ; Greece/epidemiology ; Humans ; Intensive Care Units ; Klebsiella Infections/drug therapy ; Klebsiella Infections/epidemiology ; Klebsiella Infections/microbiology ; Klebsiella pneumoniae/drug effects ; Klebsiella pneumoniae/genetics ; Male ; Microbial Sensitivity Tests ; Middle Aged ; Public Health Surveillance ; beta-Lactam Resistance ; beta-Lactamases/biosynthesis ; beta-Lactamases/genetics
    Chemical Substances Azabicyclo Compounds ; Bacterial Proteins ; Drug Combinations ; avibactam, ceftazidime drug combination ; Ceftazidime (9M416Z9QNR) ; beta-Lactamases (EC 3.5.2.6) ; carbapenemase (EC 3.5.2.6)
    Language English
    Publishing date 2019-05-14
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 191709-2
    ISSN 1460-2091 ; 0305-7453
    ISSN (online) 1460-2091
    ISSN 0305-7453
    DOI 10.1093/jac/dkz125
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  10. Article ; Online: The first NDM metallo-β-lactamase producing Klebsiella pneumoniae isolate in a University Hospital of Southwestern Greece.

    Spyropoulou, Aikaterini / Bartzavali, Christina / Vamvakopoulou, Sophia / Marangos, Markos / Anastassiou, Evangelos D / Spiliopoulou, Iris / Christofidou, Myrto

    Journal of chemotherapy (Florence, Italy)

    2016  Volume 28, Issue 4, Page(s) 350–351

    MeSH term(s) Aged ; Bacteremia/diagnosis ; Bacteremia/microbiology ; Drug Resistance, Bacterial ; Greece ; Hospitals, Teaching ; Humans ; Klebsiella Infections/diagnosis ; Klebsiella Infections/microbiology ; Klebsiella pneumoniae/drug effects ; Klebsiella pneumoniae/enzymology ; Klebsiella pneumoniae/genetics ; Klebsiella pneumoniae/isolation & purification ; Male ; beta-Lactamases/genetics ; beta-Lactamases/metabolism
    Chemical Substances beta-Lactamases (EC 3.5.2.6)
    Language English
    Publishing date 2016-08
    Publishing country England
    Document type Case Reports ; Letter
    ZDB-ID 1036294-0
    ISSN 1973-9478 ; 1120-009X
    ISSN (online) 1973-9478
    ISSN 1120-009X
    DOI 10.1179/1973947815Y.0000000003
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