Department of Pathology UCD-School of Medicine



Self Assessment Exercises VIII

Return to Microbiology



The latest update in the taxonomy of the Pasturellaceae was presented at the Feb. 28, 2007 CACMLE Microbiology and Infectious Diseases Teleconference presented by William M. Janda, Ph. D., the Director of the Microbiology Laboratory at the University of Illinois Hospital in Chicago. The creation of new Families and Genera, with the addition to and shifts in the designations of time-honored species has resulted in a new and often confusing nomenclature. The taxonomic outline here is condensed to include what I feel are the necessary bacterial species within each Genus for clinical pathology residents to know. Each genus contains up to a dozen additional species, most of which are animal in origin and uncommonly encountered in human infections.


Family Pasturellaceae

              Genus Haemophilus

                            Haemophilus influenzae

                            Haemophilus parainfluenzae

                            Haemophilus hemolyticus

                            Haemophilus aegypticus

              Genus Pastuerella

                            Pastuerella multocida

              Genus Aggregatibacter

                            Aggregatibacter actinomycemcomitans (formerly in the genus Actinobacillus)

                            Aggretatibacter aphrophilus (formerly in the genus Haemophilus)

              Genus Actinobacillus (all are animal species except A. hominis and A. ureae which are
              uncommonly recovered in cases of human infections)



Haemophilus aphophilus (moved to the new genus Aggregatibacter)

Actinobacillus actinomycetemcomitans (moved to the new genus Aggregatibacter)

Cardiobacterium hominus

Eikenella corrodens

Kingella kingae


Capnocytophaga species.




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