New vaccine strains having two or three different attenuation active metabolic drift mutations, which result in smaller colonies with corresponding longer generation time and correlated attenuation degree

摘要

Vaccine strains having two or three different attenuation active metabolic drift mutations, which result in smaller colonies with correspondingly longer generation times and correlated attenuation degree, with respect to reduced growth intensity, against the respective wild strains, are new. An independent claim is included for the preparation of the vaccine strains. ACTIVITY : Antibacterial; Fungicide; Antidiarrheic. MECHANISM OF ACTION : Vaccine.