Agrobacterium tumefaciens
The "Brucella" species belongs to the Rhizobiales group, in the Alphaproteobacteria class. They are growing by unipolar growth, like "Agrobacterium tumefaciens", "Sinorhizobium meliloti", and "Ochrobactrum anthropi". They usually have two chromosomes and their replication and segregation are temporally organized.