 Following the characterization of CfxA beta- lactamase in "B. vulgatus" and CfxA2 beta-lactamase in "P. intermedia" (nucleotide Genbank under accession number AF118110), a new group 2e of Bush classification named CfxA3 (nucleotide GenBank under accession number AF472622) has been characterized in "C. ochracea" E201 (Jolivet-Gougeon et al.2004).The cfxA3 gene has 99% identity with cfxA of "B. vulgatus" and cfxA2 of "P. intermedia".