PURPOSE: To provide an immune effect enhancer for vaccine which has very low toxicity and can be applied as a food or feed. ;CONSTITUTION: The immune effect enhancer for viruses and bacteria comprises an effective amount of a glucan having β-1,3-glycoside linkages as a major chain such as schizophyllan, lentinan or scleroglucan. The dose of the glucan is orally 1 to 1,000mg/kg, preferably 10 to 200mg/kg, and 0.1 to 100mg/kg, preferably 1 to 50mg/kg in injection. When it is applied as a food or feed, it is in no need of exact purification, may be a crude product or the dried culture mixture as such for polysaccharide production.;COPYRIGHT: (C)1994,JPO&Japio
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