#Klebsiella pneumoniae causing #UTIs in companion #animals and #humans: population structure, antimicrobial resistance and virulence genes (J Antimicrob Chemother., abstract)

[Source: Journal of Antimicrobial Chemotherapy, full page: (LINK). Abstract, edited.]

Klebsiella pneumoniae causing urinary tract infections in companion animals and humans: population structure, antimicrobial resistance and virulence genes

Cátia Marques, Juliana Menezes, Adriana Belas, Catarina Aboim, Patrícia Cavaco-Silva, Graça Trigueiro, Luís Telo Gama, Constança Pomba

Journal of Antimicrobial Chemotherapy, dky499, https://doi.org/10.1093/jac/dky499

Published: 10 December 2018




To characterize the population structure, antimicrobial resistance and virulence genes of Klebsiella spp. isolated from dogs, cats and humans with urinary tract infections (UTIs).


Klebsiella spp. from companion animals (n = 27) and humans (n = 77) with UTI were tested by the disc diffusion method against 29 antimicrobials. Resistant/intermediate isolates were tested by PCR for 16 resistance genes. Seven virulence genes were screened for by PCR. All Klebsiella pneumoniae from companion animals and third-generation cephalosporin (3GC)-resistant isolates from humans were typed by MLST. All Klebsiella spp. were compared after PFGE XbaI macro-restriction using Dice/UPGMA with 1.5% tolerance.


blaCTX-M-15 was detected in >80% of 3GC-resistant strains. K. pneumoniaehigh-risk clonal lineage ST15 predominated in companion animal isolates (60%, n = 15/25). Most companion animal ST15 K. pneumoniae belonged to two PFGE clusters (C4, C5) that also included human strains. Companion animal and human ST15-CTX-M-15 K. pneumoniae shared a fimH-1/mrkD/entB/ycfM/kfu virulence profile, with a few (n = 4) also harbouring the yersiniabactin siderophore-encoding genes. The hospital-adapted ST11 K. pneumoniae clonal lineage was detected in a cat (n = 1) and a human (n = 1); both were MDR, had 81.1% Dice/UPGMA similarity and shared several virulence and resistance genes. Two 3GC-resistant ST348 strains with 86.7% Dice/UPGMA similarity were isolated from a cat and a human.


Companion animals with UTI become infected with high-risk K. pneumoniaeclonal lineages harbouring resistance and virulence genes similar to those detected in strains from humans. The ST15-CTX-M-15 K. pneumoniae clonal lineage was disseminated in companion animals with UTI. Caution must be applied by companion animal caretakers to avoid the spread of K. pneumoniaehigh-risk clonal lineages.


© The Author(s) 2018. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For permissions, please email: journals.permissions@oup.com.

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Keywords: Antibiotics; Drugs Resistance; Cephalosporins; Klebsiella pneumoniae; Cats; Human.


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Giuseppe Michieli

I am an Italian blogger, active since 2005 with main focus on emerging infectious diseases such as avian influenza, SARS, antibiotics resistance, and many other global Health issues. Other fields of interest are: climate change, global warming, geological and biological sciences. My activity consists mainly in collection and analysis of news, public services updates, confronting sources and making decision about what are the 'signals' of an impending crisis (an outbreak, for example). When a signal is detected, I follow traces during the entire course of an event. I started in 2005 my blog ''A TIME'S MEMORY'', now with more than 40,000 posts and 3 millions of web interactions. Subsequently I added an Italian Language blog, then discontinued because of very low traffic and interest. I contributed for seven years to a public forum (FluTrackers.com) in the midst of the Ebola epidemic in West Africa in 2014, I left the site to continue alone my data tracking job.