1. A bacterial generic name placed on the list of rejected names by the Judicial Commission and the International Committee on Systematic Bacteriology of the International Association of Microbiological Societies. As a consequence, Bacterium is no longer used in bacteriology. Identifiable organisms formerly placed in the genus Bacterium have all been transferred to other genera. Specifically, Bacterium anitratum is now known as Acinetobacter calcoaceticus; Bacterium coli is now called Escherichia coli.
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