A
Ana R. Freitas
Researcher at University of Porto
Publications - 65
Citations - 1802
Ana R. Freitas is an academic researcher from University of Porto. The author has contributed to research in topics: Enterococcus faecium & Enterococcus faecalis. The author has an hindex of 20, co-authored 57 publications receiving 1382 citations.
Papers
More filters
Journal ArticleDOI
Update on prevalence and mechanisms of resistance to linezolid, tigecycline and daptomycin in enterococci in Europe Towards a common nomenclature
Jennifer K. Bender,Vincent Cattoir,Kristin Hegstad,Ewa Sadowy,Teresa M. Coque,Henrik Westh,Anette M. Hammerum,Kirsten Schaffer,K. Burns,Stephen Murchan,Carla Novais,Ana R. Freitas,Luísa Peixe,Maria Del Grosso,Annalisa Pantosti,Guido Werner +15 more
TL;DR: This review briefly recapitulate the current knowledge on the mode of action as well as the known and novel mechanisms of resistance and describes surveillance data on resistance to linezolid, tigecycline and daptomycin in enterococci.
Journal ArticleDOI
Human and Swine Hosts Share Vancomycin-Resistant Enterococcus faecium CC17 and CC5 and Enterococcus faecalis CC2 Clonal Clusters Harboring Tn1546 on Indistinguishable Plasmids
Ana R. Freitas,Teresa M. Coque,Carla Novais,Carla Novais,Anette M. Hammerum,Camilla M. Lester,Marcus J. Zervos,Marcus J. Zervos,Susan M. Donabedian,Lars Bogø Jensen,Maria Victoria Francia,Fernando Baquero,Luísa Peixe +12 more
TL;DR: The results indicate a current intra- and international spread of E. faecium and E. Faecalis clones and their plasmids among swine and humans.
Journal ArticleDOI
Multilevel population genetic analysis of vanA and vanB Enterococcus faecium causing nosocomial outbreaks in 27 countries (1986–2012)
Ana R. Freitas,Ana P. Tedim,Maria Victoria Francia,Lars Bogø Jensen,Carla Novais,Luísa Peixe,Antonio Sánchez-Valenzuela,Arnfinn Sundsfjord,Kristin Hegstad,Guido Werner,Ewa Sadowy,Anette M. Hammerum,Lourdes Garcia-Migura,Rob J. L. Willems,Fernando Baquero,Teresa M. Coque +15 more
TL;DR: Both strains and plasmids contributed to the spread and persistence of vancomycin resistance among E. faecium.
Journal ArticleDOI
Clonal expansion within clonal complex 2 and spread of vancomycin-resistant plasmids among different genetic lineages of Enterococcus faecalis from Portugal
TL;DR: Both clonal expansion and dissemination of epidemic conjugative VanA plasmids seem to join forces in the establishment of pathogenic E. faecalis strains.
Journal ArticleDOI
A multiresistance megaplasmid pLG1 bearing a hylEfm genomic island in hospital Enterococcus faecium isolates.
Jenny A. Laverde Gomez,Willem van Schaik,Ana R. Freitas,Teresa M. Coque,Keith E. Weaver,Maria Victoria Francia,Wolfgang Witte,Guido Werner +7 more
TL;DR: In this paper, the putative virulence factor hylEfm, encoding a putative hyaluronidase, is enriched among the hospital-associated polyclonal subpopulation of E. faecium.