Abstract:
By using well-defined techniques under optimum conditions it is possible adequately to define the biochemical
characteristics of typical A. seminis strains. A. seminis can be distinguished from Histophilus avis on
the latter's distinctive colony morphology, but it cannot be distinguished from Actinobacillus actinomycetemcomitans.
These organisms, however, can be differentiated from Pasteurella haemolytica on serological grounds
and the latter's greater pathogenicity for mice. It is appreciated, however, that intermediate forms occur which
cannot as yet be satisfactorily allocated to any of the above-mentioned genera.
