Title
Locations of gut-associated lymphoid tissue in the 3-month-old chicken : a review Locations of gut-associated lymphoid tissue in the 3-month-old chicken : a review
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Veterinary Sciences
Publication type
article
Publication
Houghton ,
Subject
Veterinary medicine
Source (journal)
Avian pathology. - Houghton
Volume/pages
39(2010) :3 , p. 143-150
ISSN
0307-9457
ISI
000278665700001
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The lymphoid tissue that is associated with the intestinal tract, the so-called gut-associated lymphoid tissue (GALT), is well developed in the chicken. Depending on the location, it is present as aggregations of lymphoid cells, or organized in lymphoid follicles and tonsils. From proximal to distal, the intestinal tract contains a pharyngeal tonsil, diffuse lymphoid tissue and lymphoid follicles in the cervical and thoracic parts of the oesophagus, an oesophageal tonsil, diffuse lymphoid tissue in the proventriculus, a pyloric tonsil, Peyer's patches, Meckel's diverticulum, two caecal tonsils, diffuse lymphoid tissue in the rectum, the bursa of Fabricius, and diffuse lymphoid tissue in the wall of the proctodeum. The lymphoid tissues are frequently covered by a lympho-epithelium that is infiltrated by lymphoid cells. Such an epithelium often contains M or microfold cells, which are specialized in antigen sampling and transport antigens to the underlying lymphoid tissue. A solid knowledge of the avian GALT could contribute to the development of vaccines to be administered orally. Additionally, immune stimulation via pre- and probiotics is based on the presence of a well-developed intestinal immune system.
E-info
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