Abstract
The immunity of bull semen was examined. Rabbits were immunized with bull semen or bull seminal plasma with Freund's complete adjuvant to take the anti-bull-semen serum or the anti-bull-seminal plasma serum.
The precipitation reactions wih these two sera resulted in that "the forms of the plates of precipitations" showed both a rectangel shape. In double diffusion method in agar plate (Ouchterlony method), the anti-bull-semen serum was recognized to have more than two antigens and the anti-bull-seminal plasma serum to have mere than four against both semen and seminal plasma. No difference was found among semens taken from three different bulls and anti-bull-semen serum concerned with the appearance of the precipitation lines in Ouchterlony method. No line was detected between anti-bull-seminal-plasma serum and swine seminal plasma.
