1887

Abstract

Five obligately anaerobic, Gram-stain-negative, saccharolytic and proteolytic, non-spore-forming bacilli (strains CD3 : 27, CD3 : 28, CD3 : 33, CD3 : 32 and CD3 : 34) are described. All five strains were isolated from the small intestine of a female child with coeliac disease. Cells of the five strains were short rods or coccoid cells with longer filamentous forms seen sporadically. The organisms produced acetic acid and succinic acid as major metabolic end products. Phylogenetic analysis based on comparative 16S rRNA gene sequence analysis revealed close relationships between CD3 : 27, CD3 : 28 and CD3 : 33, between CD3 : 32 and CCUG 55407, and between CD3 : 34 and CCUG 4944B. Strains CD3 : 27, CD3 : 28 and CD3 : 33 were clearly different from all recognized species within the genus and related most closely to but distinct from . Based on 16S rRNA, RNA polymerase β-subunit () and 60 kDa chaperonin protein subunit () gene sequencing, and phenotypic, chemical and biochemical properties, strains CD3 : 27, CD3 : 28 and CD3 : 33 are considered to represent a novel species within the genus , for which the name sp. nov. is proposed. Strain CD3 : 28 ( = CCUG 60371 = DSM 26989) is the type strain of the proposed novel species. All five strains were able to form homologous aggregates, in which tube-like structures were connecting individual bacteria cells. The five strains were able to bind to human intestinal carcinoma cell lines at 37 °C.

Funding
This study was supported by the:
  • Swedish Research Council, Natural Sciences and Engineering Sciences (Award 222720-2 and 2010-5669)
  • Fund for Biotechnology-oriented Basic Science at Umeå University
  • County of Västerbotten
  • Medical faculty of Umeå University
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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2013-11-01
2024-03-28
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