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Two isolates of a nocardioform bacterium capable of producing an extracellular hydrolase for high molecular weight dextran were isolated from soil by selection of active colonies on a blue dextran agar medium. Comparison with the type strains of Oerskovia turbata and O. xanthineolytica showed that these fresh isolates were closely similar to the latter species. Extracellular dextranase activity was not detected in the type strains of Oerskovia spp. or in 78 other Gram positive bacteria representing 58 species and 14 genera.
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Hayward et al. (1976) studied this question.
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