FIELD: veterinary science. SUBSTANCE: the method deals with preparing a test microbe, obtaining a blood serum, introducing a test microbe into a blood serum, incubation in a thermostat at 37 C. Before and after incubation one should determine blood serum pH with a test microbe and according to its alterations a bactericidal activity is estimated. EFFECT: higher accuracy of estimation. 2 ex, 2 tbl
