Abstract
Several anaerobic, thermophilic, Gram-positive bacteria were isolated from dairy products and canned meats. While some isolates were identified as Thermoanaerobacter thermohydrosulfuricus, comparisons of 16S rDNA genes indicated that others were phylogenetically closely related to Thermoanaerobacter mathranii, and more distantly related to Thermoanaerobacter thermocopriae and Thermoanaerobacter italicus. Biochemical characteristics, phylogenetic analysis, G+C content, and DNA–DNA hybridization experiments demonstrated that the strains AIP 504.99, AIP 505.99 T and AIP 431.03, notwithstanding their high sequence similarities differ from T. mathranii and represent a novel T. mathranii subspecies for which the name T. mathranii subsp. alimentarius is proposed. The type strain is strain AIP 505.99 T=CIP 108280 T=CCUG 49566 T. Emendation of the species description for T. mathranii is proposed to include this subspecies.
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