Nadya Bozakova1, Lilyan Sotirov2, Miroslav Simeonov3, Veselin Ivanov4, Tsvetoslav Koynarski2 and Krum Nedelkov5
1 Trakia University, Department of Animal Husbandry, Faculty of Veterinary Medicine, 6000 Stara Zagora, Bulgaria
2 Trakia University, Department of Animal Husbandry, Faculty of Veterinary Medicine, 6000 Stara Zagora, Bulgaria
3 Agricultural Academy, Department on Breeding and Technologies in Cattle Breeding, Agricultural Institute, 6000 Stara Zagora, Bulgaria
4 Trakia University, Department of Social Medicine, Health Management and Disaster Medicine, Faculty of Medicine, Stara Zagora, Bulgaria
5 Trakia University, Department of Animal Husbandry, Faculty of Veterinary Medicine, 6000 Stara Zagora
Bozakova, N., Sotirov, L., Simeonov, M., Ivanov, V., Koynarski, Ts. & Nedelkov, K. (2025). Influence of Immunobeta® and Silymarin preparations on weight development and some indicators of oxidative stress in Lacaune lambs. Bulg. J. Agric. Sci., 31(4), 807–813
Since 2006, the European Community has banned the use of food antibiotics as growth promoters in animal husbandry. The use of modern systems to produce animal products with a high degree of concentration and automation, has led to a deterioration of the health status of sensitive breeds and hybrids. The weight development of lambs of the Lacaune breed was studied for seven months. The immunomodulator Immunobeta® and the hepatoprotector Silymarin were found to improve growth reliably, increase iron-reducing plasma capacity (FRAP), and reliably lower malondialdehyde MDA and oxidative stress index (OSI) concentrations in lambs, both through thermoneutral and during a hot summer period.