bergeyella bergeyella bergeyella is a rod-shaped, gram-negative, aerobic, non-spore-forming and non-motile genus from the family of weeksellaceae. bergeyella scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: weeksellaceae genus: bergeyellavandamme et al. 1994 type species bergeyella zoohelcum species b. cardium b. porcorum b. zoohelcum