Abstract

A chemically defined medium for host-independent (H-I) derivatives of Bdellovibrio bacteriovorus strain 109 Davis has been developed. Carbon-source utilization studies indicated that H-I cells can assimilate a wider variety of compounds than host-dependent bdellovibrios. The defined medium did not support growth of freshly isolated H-I strains which required unidentified growth factors present in Escherichia coli cell-free extracts and in yeast extract.

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