Fig. 5. Effects of the neutral exopolysaccharide (NPS) and acidic exopolysaccharide
(APS) prepared from the culture supernatant of L. bulgaricus OLL1073R-1 on the survival
rate of influenza virus-infected mice. BALB/c mice were administered orally with
water, NPS (A) or APS (B) (20 μg/day) from 21 days before to 6 days p.i. Mice were
infected with A/PR8 virus as described in the legend of Fig. 1, and the survival rates
were observed for 14 days. Asterisk indicates a statistically significant difference
(*, pb0.05, Kaplan–Meier method logrank test) from the control (n=9).