Table 2

Effect of infant bifidobacterium strains on the viability of Gram positive and Gram negative pathogens

Viable bacteria (log cfu/ml)
1 hour of contact3 hours of contact
Strain2-1CA1F9CA1F9
E coli 7.1 (0.2)6.8 (0.2)2.1 (0.2)2-160 2.3 (0.3)2-160
S flexneri 6.9 (0.2)7.1 (0.2)6.7 (0.5)6.3 (0.5)
K pneumoniae 5.1 (0.2)2-160 6.5 (0.2)2.0 (0.2)2-160 2.0 (0.2)2-160
P aeruginosa 2.1 (0.2)2-160 2.1 (0.2)2-160 2.0 (0.3)2-160 2.0 (0.3)2-160
L monocytogenes 6.9 (0.2)7.0 (0.2)5.2 (0.4)2-160 5.0 (0.4)2-160
Y pseudotuberculosis 7.0 (0.2)7.0 (0.2)2.4 (0.2)2-160 2.7 (0.2)2-160
S aureus 5.1 (0.2)2-160 5.1 (0.2)2-160 2.6 (0.2)2-160 2.5 (0.2)2-160
Streptococcus D 7.1 (0.2)7.1 (0.2)7.2 (0.2)7.2 (0.4)
C difficile 7.4 (0.2)7.4 (0.2)7.4 (0.2)7.5 (0.3)

  • ↵2-1 Control for each pathogen: 108 cfu/ml. Experimental conditions are described in materials and methods.

  • Results are presented as mean (SEM) obtained from 3–4 experiments, each in triplicate.

  • Statistical analysis using a Student's ttest,

  • ↵2-160 p<0.01 compared with control.