"Bacterium purifaciens" Christiansen 1917 Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Gammaproteobacteria order Pasteurellales family Pasteurellaceae genus Actinobacillus species Actinobacillus lignieresii Name Homonyms Bacterium purifaciens "Bacterium purifaciens" Christiansen 1917