Lysogeny of Bacterium Anitratum.

of most of the Candida strains tested was noticed, whereas the rest of the surface was covered with a thin layer of bacterial growth. Table 1 shows the mean number and the percentage of strains of C. albicans, as well as Candida of other species which inhibit the growth of the tested bacteria. The standard deviations of these mean numbers, for the 84 strains of C. albicans, were quite low, but for the 10 strains of the other species of Candida, they were high. However, the x2 values of the differences of these mean numbers were very high. We may note the following: (a) The antibacterial action of C. albicans against the tested bacteria is considerably stronger than that of the other species of Candida. (b) The antibacterial action of each strain of C. albicans differs from that of other strains. Some strains inhibit every bacteria tested, others only few. (c) The gram-negative bacteria are more sensitive than staphylococci to the antibacterial action of the Candida and specially P. vulgaris and P. aeruginosa. The zone of inhibition with the lastnamed bacteria is larger than with E. coli (2 to 3 cm) and it is considerably smaller with S. aureus. (d) With some strains of C. parakrusei we noticed an enhancement of the growth of the tested bacteria accompanied with a depression of the growth of this Candida.