Abstract
Daughter strains with increasing galactose resistance were isolated from the M-type variant of Salm. eteritidis (strain 396) by daughter colony producing method through the cultivation on galactose-Endo plates. They were named as mtl, mt2, mt3, mt4 and the details of which were already reported in the previous paper. Each of the mt strains was. subjected to the dilution culture in galactose broth.
As the result of the present investigation, galactose weakly fermenting WRT of Yamamoto, were isolated from the cultures of MT-like colonies. Exceptionally, RT of Fukutome et al. was also isolated on some occasions.
Mucoid variant mtl was newly isolated from one of the mt1 strains and the WRT which was derived from the mucoid variant was not seemd mucoid.
Distinguished difference were observed between mt and WRT group in the oxgen. consumption which was measured by warburg's apparatus.
Strain mt's showed the similar biological characters to the original. Most of mt1 strains, like the variant of M-type, were highly susceptible to galactose and lactose. WRT was different from mt's on the point that it ferments galactose.
