Morphological characteristics of Fabricius bursa of Co Lung duck from 3 to 9 weeks old

Abstract

The objective of this study aimed at identifying the changes of weight, gross and histological
features of the Fabricius bursa of the Co Lung ducks from 3 to 9 weeks old. The studied result
showed that the Fabricius bursa shape of the Co Lung ducks was cylindrical folds, located on the
end segment of rectum. The Fabricius bursa weight of ducks at 6 weeks old was heavier than that
of ducks at 3 and 9 weeks old. There was no different in the length of the Fabricius bursa of ducks at
6 and 9 weeks old. The Fabricius bursa consisted of a fibrous capsule with 3 folds that divided into
the lobes, each contained numerous lymphoid follicles. The thickness of fibrous capsules, length
and width of lymphoid follicles, length and width of germinal centers were highest in the ducks at
9 weeks old. However, area and perimeter of lymphoid follicles of Fabricius bursa of the ducks at
6 weeks old were highest. The studied results suggested that the Fabricius bursa of the Co Lung
duck breed could be degraded after 6 weeks old and before 9 weeks old. The result of this study
may be considered as a basis for further studies on immune response and disease prevention for
this duck breed.