- Brucella abortus (Schmidt, 1901) Meyer & Shaw, 1920
- Brucella canis Carmichael & Bruner, 1968
- Brucella ceti
- Brucella inopinata
- Brucella microti
- Brucella neotomae Stoenner & Lackman, 1957
- Brucella ovis Buddle, 1956
- Brucella suis Huddleson, 1929
- Brucella vulpis