Figure 7. Propionate does not sensitize to mild infection by E. coli and S. pneumoniae.

BALB/c mice were treated with or without 200 mM propionate in drinking water (A,C) or 1 g/kg propionate given i.p. every other day (B) for 3 weeks and challenged with E. coli (4 × 10⁴ CFU i.p.; n = 10 per group; (A,B) or S. pneumoniae (10⁴ CFU i.p.; n = 9–10; C). (A) Bacterial counts in blood 24 h post-infection and survival of mice. P = 0.9 and 0.7. (B,C) Survival of mice. P = 0.6 and 0.4.