Bursa of Fabricius

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bursa of Fabricius

[′bər·sə əv fə′brēsh·əs]
(vertebrate zoology)
A thymus-like organ in the form of a diverticulum at the lower end of the alimentary canal in birds.

Bursa of Fabricius


(named after G. Fabricius), a pouchlike thick-walled formation in birds, situated on the dorsal surface of the rear section of the cloaca. The bursa of Fabricius is well developed in all young birds until they reach sexual maturity, at about eight or nine months, when it becomes reduced. Rheas are the only birds in which it does not become reduced. The function of the bursa of Fabricius has not been clearly established; lymphatic cells and oxyphile leucocytes are formed inside it.

References in periodicals archive ?
2013a) reported that probiotic, mainly composed of Bacillus subtilis endospores and Clostridium butyricum, increased relative weight of spleen and bursa of Fabricius of broilers fed either low or high nutrient density diet.
1998) reported significance of early nutrition on development of primary immune organs like bursa of fabricius.
The indices of thymus, spleen and bursa of fabricius of the experimental chickens, as well as spleen lymphocyte proliferation assay, were investigated to explore the effects of squid ink on immune functions of growing Arbor Acres broilers.
The bursa of fabricius has been suggested to be the primary site of immunoglobulin synthesis (Glick, 1977).
Key words: endoscopy, biopsy, lymphoid tissue, spleen, bursa of Fabricius, avian, pigeon, Columba livia
However, milk thistle supplemented feed restored the normal weight of bursa of fabricius (group AfT).
Seven euthanized birds per group were dissected to collect the spleen, bursa of Fabricius and thymus, which were then weighed immediately.
We collected tissue samples (lungs, trachea, heart, brain, liver, kidneys, spleen, crop, proventriculus, gizzard, small and large intestine, pancreas, thymus, bursa of Fabricius, adrenal glands, and gonads) from each bird, fixed the samples in neutral-buffered 10% formalin solution, and processed them by standard methods for histopathologic examination.
The Bursa of fabricius was collected from poultry flocks of Punjab Pakistan for isolation of IBD virus by inoculating in embryonated chicken eggs through chorioallantoic membrane.

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