Studies on the Form Variation of Salmonella, Especially Serological Studies on the Form Variation of Salmonella pullorum

Abstract

The form variation of Salmonella, especially in S. pullorum, exhibit rather complexones, and it has been recognized that the factor 12₂ would play its main role.The author attempt to establish the diagnostic standpoint of pullorum disease byascertaining those response behavior of blood antibodies in fowls infected with “Variant” as well as “Standard” strain of S. pullorum against the respective factors.
As the results obtained, the majority of adult ones in infected bulk with variant and standard strains indicated the same reactive forms against and variant standard antigens.
Chickens manifested, however, notable tendencies of special response form against these two different antigenic formula respectively. Especially, in those infected with the variant strain., these were markedly distinct.
In chickens, such being the case discribed above, unlike the adult ones, it was pointed. out that antibodies produced by result of the infection of variant strain were occupied by those factors corresponding 12₂, and those of standard strain, by the fators corresponding 12₃.
It was ascertained, that there were few antibodies corresponding 9 and 12, ₁ factors which are common for every strains of S. pullorum.