Klebsiella oxytoca causes opportunistic human infections and post-antibiotic haemorrhagic diarrhea. This Enterobacteriaceae species is genetically heterogeneous and is currently subdivided into seven phylogroups (Ko1 to Ko4 and Ko6 to Ko8). Here we investigated the taxonomic status of phylogroups Ko3 and Ko4. Genomic sequence-based phylogenetic analyses demonstrate that Ko3 and Ko4 formed well-defined sequence clusters related to, but distinct from, Klebsiella michiganensis (Ko1), K. oxytoca (Ko2), K. huaxiensis (Ko8), and K. grimontii (Ko6). The average nucleotide identity (ANI) of Ko3 and Ko4 were 90.7% with K. huaxiensis and 95.5% with K. grimontii, respectively. In addition, three strains of K. huaxiensis, a species so far described based on a single strain from a urinary tract infection patient in China, were isolated from cattle and human feces. Biochemical and MALDI-ToF mass spectrometry analysis allowed differentiating Ko3, Ko4, and Ko8 from the other K. oxytoca species. Based on these results, we propose the names Klebsiella spallanzanii for the Ko3 phylogroup, with SPARK_775_C1T (CIP 111695T and DSM 109531T) as type strain, and Klebsiella pasteurii for Ko4, with SPARK_836_C1T (CIP 111696T and DSM 109530T) as type strain. Strains of K. spallanzanii were isolated from human urine, cow feces, and farm surfaces, while strains of K. pasteurii were found in fecal carriage from humans, cows, and turtles.
Description of Klebsiella spallanzanii sp. nov. and of Klebsiella pasteurii sp. nov / C. Merla, C. Rodrigues, V. Passet, M. Corbella, H.A. Thorpe, T.V.S. Kallonen, Z. Zong, P. Marone, C. Bandi, D. Sassera, J. Corander, E.J. Feil, S. Brisse. - In: FRONTIERS IN MICROBIOLOGY. - ISSN 1664-302X. - 10(2019 Oct 25).
|Titolo:||Description of Klebsiella spallanzanii sp. nov. and of Klebsiella pasteurii sp. nov|
|Parole Chiave:||Klebsiella oxytoca complex; MALDI-ToF mass spectrometry; blaOXY; genome sequencing; phylogeny; taxonomy|
|Settore Scientifico Disciplinare:||Settore BIO/19 - Microbiologia Generale|
Settore MED/07 - Microbiologia e Microbiologia Clinica
|Data di pubblicazione:||25-ott-2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3389/fmicb.2019.02360|
|Appare nelle tipologie:||01 - Articolo su periodico|