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Gordonibacter pamelaeae gen. nov., sp. nov., a new member of the Coriobacteriaceae isolated from a patient with Crohn's disease, and reclassification of Eggerthella hongkongensis Lau et al. 2006 as Paraeggerthella hongkongensis gen. nov., comb. nov.

¹ Environmental Microbiology Laboratory, Helmholtz Centre for Infection Research, Inhoffenstr. 7, D-38124 Braunschweig, Germany
² DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstr. 7B, D-38124 Braunschweig, Germany
³ Department of Vaccinology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, D-38124 Braunschweig, Germany
⁴ Biodegradation Group, Helmholtz Centre for Infection Research, Inhoffenstr. 7, D-38124 Braunschweig, Germany
⁵ Institute for Clinical Molecular Biology, Christian-Albrechts-University Kiel, Schittenhelmstr. 12, D-24105 Kiel, Germany

Correspondence
Dieco Würdemann
dieco.wuerdemann{at}helmholtz-hzi.de

A strictly anaerobic, Gram-positive, short-rod/coccobacillus-shaped bacterial strain, designated 7-10-1-b^T, was isolated from the colon of a patient suffering from acute Crohn's disease. The isolate formed small, pale-white, semi-translucent colonies on solid cultivation media. The strain was catalase-positive and metabolized only a small number of carbon sources. Whole-cell fatty acids consisted predominantly of saturated fatty acids (89 %), of which 15 : 0 anteiso was the major component. The polar lipids phosphatidylglycerol and diphosphatidylglycerol as well as four glycolipids were identified. 16S rRNA gene sequence analysis revealed that the isolate represents a distinct lineage within the family Coriobacteriaceae and has 94.6 % identity to the type strain of [Eggerthella] hongkongensis, the phylogenetically closest bacterial species. On the basis of the analyses performed, the new genus and species Gordonibacter pamelaeae gen. nov., sp. nov. is described, with strain 7-10-1-b^T (=DSM 19378^T =CCUG 55131^T) as the type and only strain of Gordonibacter pamelaeae. Also, based on the chemotaxonomic data obtained for all type strains of the neighbouring genus Eggerthella, we propose that Eggerthella hongkongensis Lau et al. 2006 be transferred to a new genus as Paraeggerthella hongkongensis gen. nov., comb. nov.; the type strain of Paraeggerthella hongkongensis is HKU10^T (=DSM 16106^T =CCUG 49250^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain 7-10-1-b^T is AM886059.

A dendrogram derived from biochemical profiles, a maximum-likelihood tree based on 16S rRNA gene sequences, TLC of polar lipids of strain 7-10-1-b^T and comparisons of the fatty acid and menaquinone profiles of strain 7-10-1-b^T and related type strains are available as supplementary material with the online version of this paper.

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				P. C. Y. Woo, J. L. L. Teng, K. K. M. Lam, C. W. S. Tse, K.-W. Leung, A. W. S. Leung, S. K. P. Lau, and K.-Y. Yuen First Report of Gordonibacter pamelaeae Bacteremia J. Clin. Microbiol., January 1, 2010; 48(1): 319 - 322. [Abstract] [Full Text] [PDF]