Serratia fonticola, a New Species from Water

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Abstract
Twenty strains of Enterobacteriaceae isolated from water are assigned to a new species in the genus Serratia on the basis of phenetic (numerical analysis) and genetic (DNA-DNA hybridization) evidence. They are closely related to each other (75-91% DNA-DNA relatedness) and show 50% DNA relatedness with Serratia spp. but only 20-30% relatedness with other members of the family Enterobacteriaceae. The strains are acetoin, gelatinase and DNase negative, but lysine, ornithine decarboxylase and Tween-esterase positive. They are metabolically very active, fermenting all the sugars and alcohols tested except melezitose, inulin and sorbose. The name S. fonticola is proposed for these strains. Strain 11 (= ATCC 29844) is the type strain of the species.