Abstract
Bergey's Manual of Systematic Bacteriology is one of the most comprehensive and authoritative works in the field of bacterial taxonomy. However, rapid advances in molecular sequencing of highly conserved regions of the prokaryotic genome, most notably genes coding for the RNA of the small ribosomal subunit, have resulted in numerous taxonomic rearrangements and changes in nomenclature since the first edition of the Manual was published in 1984. This paper summarizes the present state of taxonomy of anaerobic Gram-negative bacteria described in the first edition of the Manual.
