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The spleen, lymph nodes, thymus, Peyer patches, and tonsils, where more than 98% of T lymphocytes are found.See: T cell
See also: organ
resembling or pertaining to lymph or to tissue of the lymphatic system.
bronchus-associated lymphoid tissue (BALT)
aggregations of B and T lymphocytes in the lower respiratory tract.
lymphocytes and plasma cells.
small foci of lymphoid tissue which occur in almost all parenchymatous organs in birds. The foci are not encapsulated and blend with the surrounding tissue.
see lymph nodule.
one of the lesions in chronic follicular pharyngitis in the horse and a cause of persistent cough, difficulty in swallowing and a stertorous respiration.
gut-associated lymphoid tissue (GALT)
aggregations of mucosal-associated lymphoid tissue in the gastrointestinal tract, including adenoids, tonsils, Peyer's patches and lamina propria of the intestine; responsible for a local immune response to antigens.
see lymphatic leukemia.
a very rare primary tumor in mammals characterized by high blood lymphocyte counts. It is the most common form of the avian leukosis complex of diseases caused by avian retroviruses. Birds are affected between the ages of 14 to 30 weeks and show nonspecific signs of emaciation, inappetence and weakness, but many also have enlarged abdomens and a palpably enlarged liver. The primary lesion is the transformation of B lymphocytes in the lymphoid follicles of the bursa of Fabricius, but multiple metastatic lesions occur in the liver, spleen, etc.
mucosal-associated lymphoid tissue (MALT)
aggregations and organized lymphoid cells tissue found immediately beneath mucous membranes lining the respiratory, gastrointestinal and urogenital system.
primary lymphoid organs include the thymus and the bursa of Fabricius and its mammalian equivalent; secondary lymphoid organs include lymph nodes, spleen, Peyer's patches, etc.
skin-associated lymphoid tissues
include a group of non-activated T lymphocytes and Langerhans cells derived from lymphatic or hematopoietic tissues which have antigen-presenting properties; enable the skin to maintain a functional immunological relationship with the immune system. Called also SALT.
the lymphoid tissue of the body, collectively; it consists of the bone marrow, thymus, lymph nodes, spleen, and gut-associated lymphoid tissue (tonsils, Peyer's patches).
a lattice work of reticular tissue, the interspaces of which contain lymphocytes.