Results of experimental studies of mice and pigs infected with foot-and-mouth disease virus, minks infected with Aujeszky's disease virus, and dogs infected with canine distemper virus are described. In animals with foot-and-mouth disease and Aujeszky's disease, combined treatment with killed vaccine and immunomodulator Ridostin by the scheme of urgent prophylaxis (3 days before infection) caused 75% (foot-and-mouth disease) and 100% (Aujeszky's disease) prevention of animal death and development of generalized infection. The use of Ridostin by the scheme of urgent prophylaxis in a canine distemper infection focus arrested clinical symptoms of the disease in 50% of animals received immunomodulator. Clinical symptoms of canine distemper in the other dogs treated with immunomodulator were manifested in a mild form, and their appearance was delayed to 23-25 days after contact with infected animal.
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