FIELD: biotechnology. SUBSTANCE: method involves preparing the tableted biopreparation by trituration method. Active substance is prepared by culturing microorganisms in nutrient medium and auxiliary substances, polyglucin and sodium alginate are added. Obtained mixture is placed in matrix and subjected for sublimating drying at temperature from -10 to -50 C and pressure 4-12 Pa for at least 48 h. The obtained preparation has living microorganisms (bacteria or viruses). The end product has the following composition, wt. -%: polyglucin, 2-3; sodium alginate, 5-6; auxiliary substances, 2-5; microorganisms-containing nutrient medium, the balance. Invention can be used in food industry, medicine, veterinary science and adjacent branches. EFFECT: high activity and stability of preparation in storage. 8 cl, 1 tbl, 5 ex
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