[Contribution to the study of the haemolytic streptococci isolated from dogs (author's transl)].

The authors studied bacteriologically 740 specimens from dogs maintained at the central kennel of the Faculdade de Ciências Médicas e Biológicas de Botucatu, being the main subject the isolation of streptococci strains from the tonsilar, vaginal conjuctival and preputial secretions. Strains with the same serological properties showed a different biochemical properties, which allowed us to appoint different biochemical types inside a same serological group. On the other hand, it was also possible to detect through the precipitation capillary tube technique, the serological groups G, C, A, D and B, being the G group (73%) the most frequent one. Biochemical properties of the human G group streptococci compared with the canine G group streptococci showed a statistically significant difference in the reactions of fibrinolysis of human plasma, glicerol, sorbitol, esculin, mannitol, inulin, raffinose, salicin, trehalos, hydrolysis of the sodium hypurate, growth on 20% bile broth, and growth at 45 degrees C. The authors stress the utility of the fibrinolysis of human plasma test for the characterization of canine origin streptococci.