no activity in Streptomyces coelicolor	standard reference actinomycete, sensitive to viomycin and capreomycin	
no activity in Streptomyces coelicolor A	standard reference actinomycete, sensitive to viomycin and capreomycin	
Saccharothrix mutabilis subsp. capreolus	NCIB 9801	
Streptomyces lividans	-	
Streptomyces vinaceus	NCIB 8852