Abstract
A polyphasic taxonomic study using morphological, biochemical, chemotaxonomic and molecular genetic methods was performed on six strains of an unknown Gram-positive, nonspore-forming, facultative anaerobic coccus-shaped bacterium isolated from a swine-manure storage pit. On the basis of 16S rRNA, RNA polymerase-subunit (rpoA), and the 60-kilodalton chaperonin (cpn60) gene sequence analyses, it was shown that all the isolates were enterococci but formed two separate lines of descent. Pairwise 16S rRNA sequence comparisons demonstrated that the two novel organisms were most closely related to each other (97.9%) and to Enterococcus aquimarinus (97.8%). Both organisms contained major amounts of C16:0, C16:1 ω7c, and C18:1 ω7c/12t/9t as the major cellular fatty acids. Based on biochemical, chemotaxonomic, and phylogenetic evidence, the names Enterococcus lemanii sp. nov. (type strain PC32(T)=CCUG 61260(T)=NRRL B-59661(T)) and Enterococcus eurekensis sp. nov. (type strain PC4B(T)=CCUG 61259(T)=NRRL B-59662(T)) are proposed for the hitherto undescribed species.
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