[Passive and active immunization against feline enteritis and rhinotracheitis in experimental cats (author's transl)].

The results of passive and active immunization against feline rhinotracheitis with regard to mortality and morbidity were studied in 335 cats. Passive immunization reduced mortality from pneumonia from 5 per cent to 1 per cent. Vaccination against rhinotracheitis also reduced mortality from pneumonia from 5.3 per cent to 0 per cent and markedly reduced morbidity of these conditions.