Immunoglobulin A in some avian species other than the fowl.

In immunodiffusion tests rabbit and pheasant antisera monospecific for fowl IgA detected a cross-reacting homologous protein in sera and/or secretions (saliva and bile) of pheasant, Japanese quail, guinea fowl, turkey and pigeon. Negative findings with duck samples do not preclude the occurrence of a similar immunoglobulin class in that species.