Robert-von-Ostertag-Str. 7-13
14163 Berlin
+49 30 838 51843 / 66949
mikrobiologie@vetmed.fu-berlin.de
Klebsiellapneumoniae (Kp)-infections in humans and animalsare frequently associated with multi-drug resistant (MDR) phenotypes. In humanmedicine, the global spread of MDR Kpis linked to successful high-risk genetic lineages such as ST258 and the newly emerging ST307. Here, we report on multiple isolations of ST307 from a dog suffering from chronic urinary tract infection (UTI).All confirmed Kpisolates were whole-genome sequenced (WGS) using Illumina MiSeq. Genotypic characterization includedthe determination of sequence type (ST), transferable resistance genes and plasmids (https://cge.dtu.dk).Ten Kpisolates were identified, with five being in mixed culture withother bacterial species. All Kp belonged to ST307, six harbored an IncF-plasmid and were ESBL-positive (blaCTX-M-15). First phylogenetic analysis revealed a close relationship between the strains.Although genetic features that may provide an advantage in adaption to the human host have been reported for this lineage, blaCTX-M-15-MDR ST307 can cause UTI in companion animals.This is in accordance with a current study reporting ST307-blaCTX-M-15in canine and feline urine samples. As they can serve as source of infection for high-risk Kpclones, companion animals may pose a risk to their owners. Consequently, further investigation is needed to elucidate whether bacterial persistence may explain the detection of eight closely related isolates from a canine patient under antibiotic therapy in a one-year period.