{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,31]],"date-time":"2026-10-31T04:16:05Z","timestamp":1793420165663,"version":"4.5.0"},"reference-count":32,"publisher":"Microbiology Society","issue":"Pt_9","funder":[{"name":"French Government\u2019s Investissement d\u2019Avenir program, Laboratoire d\u2019Excellence \u2018Integrative Biology of Emerging Infectious Diseases\u2019","award":["ANR-10-LABX-62-IBEID"],"award-info":[{"award-number":["ANR-10-LABX-62-IBEID"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2014,9,1]]},"abstract":"Strains previously classified as members ofKlebsiella pneumoniae<\/jats:italic><\/jats:ext-link><\/jats:named-content>phylogroups KpI, KpII-A, KpII-B and KpIII were characterized by 16S rRNA (rrs<\/jats:italic>) gene sequencing, multilocus sequence analysis based onrpoB<\/jats:italic>,fusA<\/jats:italic>,gapA<\/jats:italic>,gyrA<\/jats:italic>andleuS<\/jats:italic>genes, average nucleotide identity and biochemical characteristics. Phylogenetic analysis demonstrated that KpI and KpIII corresponded toK. pneumoniae<\/jats:italic><\/jats:ext-link><\/jats:named-content>andKlebsiella variicola<\/jats:italic><\/jats:ext-link><\/jats:named-content>, respectively, whereas KpII-A and KpII-B formed two well-demarcated sequence clusters distinct from other members of the genusKlebsiella<\/jats:italic><\/jats:ext-link><\/jats:named-content>. Average nucleotide identity between KpII-A and KpII-B was 96.4\u200a%, whereas values lower than 94\u200a% were obtained for both groups when compared withK. pneumoniae<\/jats:italic><\/jats:ext-link><\/jats:named-content>andK. variicola<\/jats:italic><\/jats:ext-link><\/jats:named-content>. Biochemical properties differentiated KpII-A, KpII-B,K. pneumoniae<\/jats:italic><\/jats:ext-link><\/jats:named-content>andK. variicola<\/jats:italic><\/jats:ext-link><\/jats:named-content>, with acid production from adonitol andl<\/jats:sc>-sorbose and ability to use 3-phenylproprionate, 5-keto-d<\/jats:sc>-gluconate and tricarballylic acid as sole carbon sources being particularly useful. Based on their genetic and phenotypic characteristics, we propose the namesKlebsiella quasipneumoniae<\/jats:italic>subsp.quasipneumoniae<\/jats:italic>subsp. nov. andK. quasipneumoniae<\/jats:italic>subsp.similipneumoniae<\/jats:italic>subsp. nov. for strains of KpII-A and KpII-B, respectively. The type strain ofK. quasipneumoniae<\/jats:italic>sp. nov. and ofK. quasipneumoniae<\/jats:italic>subsp.quasipneumoniae<\/jats:italic>subsp. nov. is 01A030T<\/jats:sup>(\u200a=\u200aSB11T<\/jats:sup>\u200a=\u200aCIP 110771T<\/jats:sup>\u200a=\u200aDSM 28211T<\/jats:sup>). The type strain ofK. quasipneumoniae<\/jats:italic>subsp.similipneumoniae<\/jats:italic>subsp. nov. is 07A044T<\/jats:sup>(\u200a=\u200aSB30T<\/jats:sup>\u200a=\u200aCIP 110770T<\/jats:sup>\u200a=\u200aDSM 28212T<\/jats:sup>). Both strains were isolated from human blood cultures. This work also showed thatKlebsiella singaporensis<\/jats:italic><\/jats:ext-link><\/jats:named-content>is a junior heterotypic synonym ofK. variicola<\/jats:italic><\/jats:ext-link><\/jats:named-content>.<\/jats:p>","DOI":"10.1099\/ijs.0.062737-0","type":"journal-article","created":{"date-parts":[[2014,6,24]],"date-time":"2014-06-24T06:28:57Z","timestamp":1403591337000},"page":"3146-3152","source":"Crossref","is-referenced-by-count":214,"title":["Description of Klebsiella quasipneumoniae sp. nov., isolated from human infections, with two subspecies, Klebsiella quasipneumoniae subsp. quasipneumoniae subsp. nov. and Klebsiella quasipneumoniae subsp. similipneumoniae subsp. nov., and demonstration that Klebsiella singaporensis is a junior heterotypic synonym of Klebsiella variicola"],"prefix":"10.1099","volume":"64","author":[{"given":"Sylvain","family":"Brisse","sequence":"first","affiliation":[{"name":"CNRS, UMR 3525, Paris, France"},{"name":"Institut Pasteur, Microbial Evolutionary Genomics Unit, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Virginie","family":"Passet","sequence":"additional","affiliation":[{"name":"CNRS, UMR 3525, Paris, France"},{"name":"Institut Pasteur, Microbial Evolutionary Genomics Unit, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick A. 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