[Isolation of group D streptococci in pyelitis cystica of swine].

A disease was noted among the replacement sows on a pig-breeding complex, exhibiting signs of pyelonephritis, cystitis, and metritis. Bacteriologic studies revealed the presence of streptococci. Streptococcus typing was carried out by means of biochemical, immunodiffusion, and immunoelectrophoretic investigations. The isolated strains were shown to belong to group D--Str. suis. The treatment of HCL-extracts to D-group streptococci with pepsin considerably raised the value of the respective immunoelectrophoretic method in the process of typing.