THE STRUCTURE AND TOPOGRAPHY OF LYMPHOID TISSUE IN IMMUNE FORMATIONS OF INTESTINES IN DUCKS



Т. A. Mazurkevych, V. T. Khomych

Анотація


The aim of the study was to determine the structure and topography
of lymphoid tissue in immune formations of the intestines (Peyer’s patches, Meckel’s
diverticulum, apical diverticula) in the postnatal period of ducks’ ontogenesis.
Established that lymphoid tissue in these organs located in the tunica mucosa and
tunica muscularis of the intestines’ wall. From the one-day age of duck, the lymphoid
tissue is found in the tunica mucosa of all studied structures and in the tunica
muscularis of the apical diverticula, and in the tunica muscularis from 10–20-days of
age in the location of Peyer’s patches and the Meckel’s diverticulum. Lymphoid tissue
has three levels of structural organization. These are diffuse lymphoid tissue, primary
lymphoid nodules and secondary lymphoid nodules. The presence of all levels of the
structural organization of lymphoid tissue indicates its complete morphofunctional
maturity. The complete morphofunctional maturity of the mucosal lymphoid tissue of
Peyer's patches is reached on the 15 day of ducks’ age, the mucosal lymphoid tissue of
the Meckel diverticulum on the 20-day of age, and in the apical diverticula on the 10-
day of age. The complete morphofunctional maturity of the muscular lymphoid tissue
of Peyer's patches is reached on the 15–25 days of ducks’ age, the muscular lymphoid
tissue of the Meckel diverticulum on the 25-day of age, and in the apical diverticula
on the 10-day of age. The present article provides the first time data summarizing
the structure and topography of lymphoid tissue in the immune formations of the
intestines, such as Peyer’s patches, Meckel’s diverticulum and apical diverticula of the
Blahovarsky cross broiler ducks.
Keywords: ducks, intestine, Peyer’s patches, Meckel’s diverticulum, apical
diverticula, lymphoid tissue.


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