IMMUNOPOTENTIATING AGENT, IMMUNOPOTENTIATING COMPOSITION CONTAINING SAME, AND IMMUNOPOTENTIATING METHOD

摘要

The purpose of the invention is to provide an immunopotentiating agent, an immunopotentiating composition, a feed composition, and an immunopotentiating method, each of which has an excellent ability to potentiate the immunocompetence of a living body. The immunopotentiating agent according to the invention comprises a lactic acid bacterium derived from Lactobacillus sakei HS-1 (FERM BP-11312) strain or a processed substance thereof. The number of the lactic acid bacterial cells is preferably from 106 to 1012 cells/g. Further, the immunopotentiating composition according to the invention is characterized by containing the immunopotentiating agent so that the number of lactic acid bacterial cells derived from Lactobacillus sakei HS-1 (FERM BP-11312) strain is from 103 to 106 cells/g.