The thermotolerant yeast strain S1 was tested for killing activity when
compared with a killer strain, S. cerevisiae K1-V1116. The thermotolerant yeast strain
S1 was not able to kill any of S. cerevisiae EC 1118, Escherichia coli ATCC 25922
and Bacillus subtilis ATCC 6633 target strains, but S. cerevisiae K1-V1116 was active
against the whole set of target strains. As shown in Table 2.6, killer activity has not
been reported from Issatchenkia sp.