304                      Pasteurellosis in White Mice

From the above table it is evident that the organism bears some serolo-
gical relationship with Past. cuniculicida but there was no reaction with strains
of Past, pseudotuberculosis rodentium.

                                    TABLE III

                                    Cross-test

                                    TABLE IV

                        Agglutination absorption test

Cross agglutination test (Table III) with eight antisera for Pasteurella
pseudotuberculosis rodentium against the mouse organism suggested that two
of our stock strains, viz., C. 19 and C. 21 showed group identity. To obviate the
possibility of intercurrent acquired immune agglutinins in the sera of the rab-
bits used for the two strains cited above, agglutinin absorption tests (Table
IV) eliminated in toto the possibility of existence of antibodies other than those
of the organism under reference.

Schutze [1928] discovered agglutination affinity between a strain of
Past. pseudotuberculosis rodentium and certain members of the Salmonella
group (S. aertrycke, S. abortus equi, etc.) the relationship being confined to the
" O " antigen. Significant as this finding appears to be, since it reveals close
relationship between two different genera, the tests as shown in Table V were
carried out to see whether such affinity exists.