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  • Title: Yersinia kristensenii subsp. rochesterensis subsp. nov., isolated from human feces.
    Author: Cunningham SA, Jeraldo P, Patel R.
    Journal: Int J Syst Evol Microbiol; 2019 Aug; 69(8):2292-2298. PubMed ID: 31135335.
    Abstract:
    A single bacterial isolate, EPLC-04T, was isolated from human feces and identified as representing a member of the genus Yersinia on the basis of phenotypic characteristics, matrix assisted laser desorption ionization time-of-flight mass spectrometry and partial 16S rRNA gene sequencing. The isolate's phenotypic profile differed from that described for the most closely related species, Yersinia kristensenii, by exhibiting lipase production and lacking pyrazinamidase activity. Multiple genetic targets, including the complete (1465 bp) 16S rRNA gene sequence and partial sequences of groEL (539 bp), gyrB (935 bp), glnA (525 bp) and recA (535 bp) indicated that the isolate exhibited 98.91, 92.16, 90.81, 92.78 and 89.01 % identity with Yersinia aldovae, 98.98, 91.99, 90.17, 89.77 and 89.55 % identity with Yersinia intermedia, and 99.66, 98.11, 98.50, 98.49 and 98.51 % identity with Y. kristensenii, respectively. Phylogenetic reconstructions based on the combination of the four housekeeping genes indicated that the isolate formed a unique branch, supported by a bootstrap value of 100 %. Digital DNA-DNA homology and 16S rRNA gene sequencing identified EPLC-04T as representing Y. kristensenii. However, the unique phenotypic traits and results of phylogenetic analysis indicate that it represents a novel subspecies of Y. kristensenii. The name Yersinia kristenseniisubsp. rochesterensis subsp. nov. is proposed for this novel taxon (type strain EPLC-04T=ATCC BAA-2637T, DSMZ 28595T).
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