The review article analyzes the existing world experience in the use of interferons IFN-α and -γ as well as drugs based on them in clinical veterinary practice in cattle and pigs. The selection of literary sources was carried out on the basis of their relevance and the depth of the research (search retrospectiveness is 30 years). It has been established that IFNs are widely used in the prevention and treatment of both infectious and non-infectious diseases, which can be divided into 3 groups: viral infections, oncological diseases, bacterial and aseptic diseases. The use of IFNs is due to their antiviral activity and immunoregulatory effect. Thus, IFN-α exhibits antiviral activity and is the first line of nonspecific immune defense, an inducer of IFN-γ synthesis and the main coordinator of the body's successful response to a viral infection. At the same time, IFN-γ provides immunoregulatory, anti-inflammatory and mediated antibacterial action by stimulating the production of macrophages and participating in the differentiation of lymphocytes. Clinical efficacy is expressed in a decrease or cessation of the infectious process, a decrease in leukocytosis and neutrophilia, relief of acidotic syndrome, an increase in the body weight of animals and an improvement in the general clinical condition. Currently, IFN therapy is one of the most promising and constantly expanding areas of immunopharmacology and treatment of common respiratory, gastrointestinal, obstetric-gynecological diseases in farm animals.

The experiment involved 10 rabbits with a live weight of 2.7-3.0 kg, divided into 2 groups. Group 1 (n=5) was the control one, with no administration of the drug to the animals. The animals of group 2 (n=5) were injected submastin in-tramuscularly at a dose of 0.1 ml/kg once daily within 3 days. A day after the last injection of the drug, diagnostic killing was performed. It has been found that after the course of therapy with the drug submastin, the animal meat does not change its chemical composition and retains its good quality as a result of the organoleptic and physicochemical assessment, and also possesses no adverse impact on the meat safety after animal slaughter.

The article presents data on the study of the effect of gentabiferon-B on the functional status of kidneys in white rat males with prolonged administration of the drug for 21 days. It was found that the administration of gentabiferon-B at doses of 1/50 and 1/20 LD50 did not have a significant effect on renal function in terms of spontaneous and induced diuresis, urea and creatinine concentrations, and no significant changes were revealed by pathomorphological examination. In rats, after a course of gentabiferon-B administration at a dose of 1/10 LD50, according to the above mentioned indicators, there were registered significant changes relative to the control group. However, all of them were reversible, which was confirmed by the results of studies 10 days after the drug withdrawal.