The Study of Biological Properties of Streptococci Which are Etiologically Significant Concerning Infectious Diseases of Calves
The article presents the results of bacteriological studies of pathological material from calves with clinical features of respiratory and gastrointestinal diseases. It is shown that seven species of streptococci (Str. рneumoniae, Str. рyogenes, Str. аgalactiae, Str. bovis, Str. dysagalactiae, Str. mutans, Str. uberis) are involved in an infectious disease of young cattle. Found that Str. рneumoniae and Str. рyogenes had significant immunogenic and antigenic properties.