Fachbereich Veterinärmedizin



    Emergence of human pandemic O25:H4-ST131 CTX-M-15 extended-spectrum-beta-lactamase-producing Escherichia coli among companion animals (2010)

    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Ewers, Christa
    Grobbel, Mirjam
    Stamm, Ivonne
    Kopp, Peter A
    Diehl, Ines
    Semmler, Torsten
    Fruth, Angelika
    Beutlich, Janine
    Guerra, Beatriz
    Wieler, Lothar H
    Guenther, Sebastian
    The Journal of antimicrobial chemotherapy; 65(4) — S. 651–660
    ISSN: 0305-7453
    DOI: 10.1093/jac/dkq004
    Pubmed: 20118165
    Institut für Mikrobiologie und Tierseuchen

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    14163 Berlin
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    Abstract / Zusammenfassung

    In view of the intercontinental emergence of Escherichia coli clone O25:H4-ST131 producing CTX-M-15 extended-spectrum beta-lactamase (ESBL) in human clinical settings it would be of great interest to explore its existence in animals to unravel a possible reservoir function and the origin and transmission of this group of multiresistant strains.

    A total of 177 clinical phenotypically ESBL-producing E. coli isolates, mainly obtained from companion animals with urinary tract infections, wound infections and diarrhoea, were collected in a veterinary diagnostic laboratory covering a European-wide service area. They were screened for molecular subtype O25b and multilocus sequence type 131. O25b-ST131 isolates were subsequently tested for ESBL types, and phenotypic and genotypic resistance determinants. Further characterization of the strains was performed by PFGE and virulence gene typing.

    Ten (5.6%) of 177 phenotypically ESBL-producing E. coli isolates, nine strains from dogs and one strain from a horse, were allocated to the B2-O25b-ST131 lineage. Nine of these isolates harboured a CTX-M-15-type beta-lactamase enzyme while one strain possessed an SHV-12-type ESBL. Macrorestriction analysis revealed a cluster formation of six of the animal CTX-M-15-type ESBL-producing strains from five different European countries together with a human control strain constituting a group of clonally related strains at a similarity value of 87.0%.

    Our findings demonstrate that the group of clonally related human B2-O25:H4-ST131 CTX-M-15-type ESBL-producing E. coli strains is present in companion animals from various European countries. This highlights the possibility of inter-species transmission of these multiresistant strains from human to animal and vice versa.