measurements of the effectiveness of antibody and leukocytes in prevention or resolution of infection indicated ( i ) that the presence of homologous antibody prior to infection prolonged the incubation period for development of the lesion , ( ii ) that the opsonic index was 1.2 to 1.4 , and ( iii ) that the organism was apparently resistant to destruction by in vitro phagocytosis and actually increased in number in the presence of phagocytes .
C0031308
phagocytosis
C0031307
phagocytes