Tkachyk L. Quality and safety of pig meat with the use of natural feed additives containing Omega-3 fatty acids and selenium

The dissertation for the first time addressed the topical issue of meat quality and safety for the use of feed additives LG-MAX and Sel-Plex, which contain natural components. For the first time, a scheme of scientific and economic experiment on the use of these feed additives in the feeding of fattening pigs has been developed. A control group of pigs and three experimental groups were created for the experiment: group D1 (2.0 g/day of LG-MAX supplement was fed to the main diet), group D2 (4.0 g/day of LG-MAX supplement was fed to the main diet), group D3 (LG-MAX and Sel-Plex supplements were fed to the main diet 2.0 g/day, according to the registration certificate). During the feeding of these feed additives, it was found that the morphological and biochemical parameters of pig serum were within physiological limits, according to the age of the experimental animals. According to the conducted microbiological researches the conformity of pork of experimental and control groups to requirements of the current regulatory documents is established. At the same time, the rate of the number of mesophilic aerobic and facultatively anaerobic microorganisms in pork (for feeding pigs 2.0 g/day of LG-MAX supplement) was lower by 73.1 % (p<0.001) and by 71.6 % (p<0.001) (for feeding pigs 2.0 g/day of LG-MAX supplement together with Sel-Plex). The use of these feed additives in pig feeding led to the death of Tetrashymena pуriformis ciliates from 0.22 % to 0.38 %, their dense growth from 99.50 % to 99.78 %, which indicates the absence of toxic effects of the drug on pig meat. Histological examination of the microstructure of the liver of pigs fed 2.0 g/day of LG-MAX feed additive revealed the presence of minor dystrophic processes in hepatocytes. In contrast, granular and fatty infiltrative dystrophy and intra-lobe vascular hyperemia were detected in porcine liver hepatocytes fed 4.0 g/day of LG-MAX feed additive and lymphohistiocytic infiltration of the stroma in pig liver fed 2.0 g/day of feed. LG-MAX supplements together with Sel-Plex.