A taxonomic <xref>genus</xref> within the <xref>family</xref> <xref>Brucellaceae</xref> — several <xref>gram-negative</xref> <xref>bacteria</xref> that are <xref>pathogenic</xref> to humans and animals.
User Defined Definitions
"an aerobic Gram-negative coccobacillus that causes brucellosis; can be used as a bioweapon"