EPS produced by L. bulgaricus OLL1073R-1 has been reported to be
composed of NPS and APS [11]. In the present study, oral administration
of APS produced by L. bulgaricus OLL1073R-1 recovered the survival
rate of influenza virus-infected mice, but NPS did not recover
the rate. APS has been reported to be composed of pentasaccharide
repeating units containing galactose and glucose in the molar ratio