 respons subtili atcc 558 streptomycin observ detail influenc streptomycin growth sm depend type author chose subtili atcc 558 experi respons streptomycin special refer relat sm concentr spore format sm depend type germin outgrowth spore form 1 18x10 cell wild type subtili atcc 558 3 200 cell sm resist cell sm depend mutant 2 substili atcc 558 normal growth sm concentr 10 growth declin rapidli sm 10 ml-20 growth stop entir sm concentr 20 3 sm resist type grow well sm 0 1 ml-sm 2 000 growth declin rapidli sm 10 000 4 sm depend type normal growth sm 10 000 ml-20 growth worth sm 10 cell shape elong time sm 1 cell filament form ten time length normal cell cell stop divid low sm concentr 6 germin outgrowth spore sm depend type slow declin sm concentr germin spore grow normal form sm concentr reach 7 8 germin slower cell grow filament form irregular form extrem low sm concentr germin outgrowth 