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Int J Syst Evol Microbiol 56 (2006), 793-795; DOI  10.1099/ijs.0.63992-0
© 2006 International Union of Microbiological Societies

Reclassification of Lactobacillus thermotolerans Niamsup et al. 2003 as a later synonym of Lactobacillus ingluviei Baele et al. 2003

G. E. Felis1,2, M. Vancanneyt3, C. Snauwaert3, J. Swings3,4, S. Torriani1, A. Castioni1 and F. Dellaglio1

1 Dipartimento Scientifico e Tecnologico, Università degli Studi di Verona, Strada le Grazie, 15, I-37134 Verona, Italy
2 Dipartimento di Scienze Biomediche, Sezione di Microbiologia Sperimentale e Clinica, Viale San Pietro 43b, I-07100 Sassari, Italy
3 BCCM/LMG Bacteria Collection, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
4 Laboratory of Microbiology, Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium

Correspondence
F. Dellaglio
franco.dellaglio{at}univr.it

The relatedness of the species Lactobacillus ingluviei and Lactobacillus thermotolerans was investigated by comparing partial sequences of the 16S rRNA gene (99·9 % similarity over 1504 bp), the hsp60 gene (98·8 % similarity over 954 bp) and the recA gene (98·5 % similarity over 452 bp) and by determining DNA–DNA binding levels (79±3 %) and genomic DNA G+C contents (50 and 49 mol%, respectively). These data, in addition to their similar biochemical characteristics, suggest that the two taxa constitute a single species. According to Rules 38 and 42 of the Bacteriological Code, they should be united under the name Lactobacillus ingluviei, with the name Lactobacillus thermotolerans as a later heterotypic synonym.

The GenBank/EMBL/DDBJ accession numbers for the partial hsp60 gene sequences of L. ingluviei LMG 20380T and L. thermotolerans DSM 14792T are respectively AJ621722 and AJ621723 and the accession numbers for the partial recA gene sequences of L. ingluviei LMG 20380T and L. thermotolerans DSM 14792T are respectively AJ972423 and AJ621677.




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