Table 4.

Enumeration of bacteria with the three morphologies present in the commercial yogurts

YogurtAvg log CFU/ml (SD) for colonial type:
LaSbBc
LS-CennanBFMLS-CennanBFMLS-CennanBFM
A6.42 (0.06)NGd 9.02 (0.08)NG6.75 (0.21)6.30 (0.06)
B6.29 (0.02)NG8.91 (0.03)NG7.88 (0.05)6.17 (0)
C7.14 (0.09)NG7.82 (0.06)NG7.06 (0.03)6.29 (0.02)
  • a Colonies showing the usual colonial morphology for Lactobacillus on LS-Cennan medium, having gram-positive rods and being fructose-6-phosphate phosphoketolase negative.

  • b Colonies showing the usual colonial morphology for Streptococcus on LS-Cennan medium, having gram-positive cocci and being fructose-6-phosphate phosphoketolase negative.

  • c Colonies showing colonial morphology forBifidobacterium on BFM and other than the usual colonial morphology for Lactobacillus or Streptococcus on LS-Cennan medium, having gram-positive irregular rods and being fructose-6-phosphate phosphoketolase positive.

  • d NG, no growth.