Abstract
The genus Elizabethkingia is genetically heterogeneous, and the phenotypic similarities between recognized species pose challenges in correct identification of clinically derived isolates. In addition to the type species Elizabethkingia meningoseptica, and more recently proposed Elizabethkingia miricola, Elizabethkingia anophelis and Elizabethkingia endophytica, four genomospecies have long been recognized. By comparing historic DNA-DNA hybridization results with whole genome sequences, optical maps, and MALDI-TOF mass spectra on a large and diverse set of strains, we propose a comprehensive taxonomic revision of this genus. Genomospecies 1 and 2 contain the type strains E. anophelis and E. miricola, respectively. Genomospecies 3 and 4 are herein proposed as novel species named as Elizabethkingia bruuniana sp. nov. (type strain, G0146T=DSM2975T=CCUG69503T=CIP 111191T) and Elizabethkingia ursingii sp. nov. (type strain, G4122T=DSM2974T=CCUG69496T=CIP111192T), respectively. Finally, the new species Elizabethkingia occulta sp. nov. (type strain G4070T=DSM2976T=CCUG69505T=CIP111193T), is proposed.
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