groups of germ-free mice kept in isolators and associated with faecal microflora from piglets were continuously given either water or a solution of one of the following : chlortetracycline ( 20 micrograms/ml ) , carbadox ( 50 micrograms/ml ) , olaquindox ( 50 micrograms/ml ) , bambermycin ( flavomycin ) ( 5 micrograms/ml ) or mixtures of these drugs .
C0004717
bambermycin
C0917887
flavomycin