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Int J Syst Evol Microbiol 54 (2004), 2197-2201; DOI  10.1099/ijs.0.63231-0
© 2004 International Union of Microbiological Societies

Geobacillus debilis sp. nov., a novel obligately thermophilic bacterium isolated from a cool soil environment, and reassignment of Bacillus pallidus to Geobacillus pallidus comb. nov.

Ibrahim M. Banat, Roger Marchant and Thahira J. Rahman

School of Biomedical Sciences, University of Ulster, Coleraine, County Londonderry BT52 1SA, Northern Ireland, UK

Correspondence
Ibrahim Banat
IM.Banat{at}ulster.ac.uk

Several aerobic, motile, rod-shaped, thermophilic, spore-forming Geobacillus bacteria predominantly giving a Gram-positive staining reaction were isolated from a cool soil environment in Northern Ireland and taxonomically investigated. Two isolates, F10 and TfT, showed low 16S rRNA gene sequence similarity to recognized members of the genus Geobacillus. Phylogenetic tree investigation using neighbour-joining, maximum-likelihood and parsimony methods indicated that strains F10 and TfT represent a single novel species, for which the name Geobacillus debilis sp. nov. is proposed, with type strain TfT (=DSM 16016T=NCIMB 13995T) and which belongs to a subgroup of the genus Geobacillus comprising Geobacillus toebii and Geobacillus caldoxylosilyticus. However, G. debilis showed closest affinities to Bacillus pallidus, which we propose should become Geobacillus pallidus comb. nov.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of F10 and TfT are AJ564608 and AJ564616, respectively.




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D. R. Zeigler
Application of a recN sequence similarity analysis to the identification of species within the bacterial genus Geobacillus
Int J Syst Evol Microbiol, May 1, 2005; 55(3): 1171 - 1179.
[Abstract] [Full Text] [PDF]


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