TY - JOUR AU - Logvinova, Vita AU - Oliyar, Аlla PY - 2021/03/31 Y2 - 2024/03/29 TI - Histoarchitectonics of Lymphoid Formations of the Mucosa of the Small Intestine of Muscy Ducks JF - Bulletin of Sumy National Agrarian University. The series: Veterinary Medicine JA - vm VL - IS - 1 (52) SE - Veterinary medicine DO - 10.32845/bsnau.vet.2021.1.5 UR - https://snaubulletin.com.ua/index.php/vm/article/view/408 SP - 31-37 AB - Features of morphogenesis of intestinal lymphoid structures of poultry, especially in the period from birth to the onset of physiological maturity, when there is an intensive formation of the immune system, must be carefully considered in intensive poultry, which determines the widespread use of biological drugs with active antigenic action. From healthy unvaccinated ducks were selected duodenum and ileum, examined by general methods: macro-microanatomy and topography of lymphoid structures of the mucous membrane of the small intestine, performed by Hellman method, paraffin histological sections were stained Ehrlich hematoxylin and eosin, azure II-eosin and impregnated with silver by Foot. Age of experimental ducks: 1, 5, 10, 15, 20, 25, 30, 60, 90, 120, 150, 180, 210 and 240 days. It is established that morpho-functional differentiation and specialization of lymphoid formations of the small intestine has age and regional features, occurs in a certain sequence. In the mucous membrane of the duodenum and ileum of ducklings from 25 days of age in parallel with the diffuse lymphoid tissue is the formation of the reticular stroma of the lymph nodes. In the mature (reactive) nodule, the embryonic center and the peripheral part, the mantle, which consists mainly of small lymphocytes, is clearly distinguished. Characteristically, the number and size of nodules increases with age. The reticular network of lymph nodes, at the same time is thinned, to its partial thinning, and further and fragmentation. ER -