TY JOUR TI INTESTINAL AND IMMUNE EFFECTS OF BIOACTIVE COLOSTRUM FACTORS IN NEWBORN CALVES UNDER PRODUCTION CONDITIONS KW colostrum KW intestinal microflora KW probiotics KW lactobacilli KW bifidobacteria KW calves KW biomaterial KW microbiocenosis KW phagocytosis KW neutrophils KW resistance KW ontogenesis JO Bulletin of KSAU AU Zhivoderova, A.I. AU Ozheredova, N.A. AU P'yanov, B.V. AU Samoylenko, V.S. PY 2024 IS 0 PB Krasnoyarsk State Agrarian University