classification at the species-level. Because of this phenotypic overlap between species, previous nomenclature of Bcc species involved genomovar terms, with Burkholderia cenocepacia categorized as genomovar III of the Bcc. Within the categorization as genomovar III, there are 4 phylogenetic lineage groups: IIIA, IIIB, IIIC, and IIID. No IIIC isolates have been found in studies on the natural environment, whereas all IIID isolates studied have been in clinical isolates of B. cenocepacia.

Microbiology