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Veterinary Pathology, Vol 13, Issue 2 90-97, Copyright © 1976 by American College of Veterinary Pathologists

ARTICLES

The respiratory tract immune system in the pig. II. associated lymphoid tissues

P. A. Bradley, F. J. Bourne and P. J. Brown

The distribution of immunoglobulins A, G and M were assessed in the bronchial lymph node and palantine tonsil of pigs from birth to maturity, using the immunoperoxidase technique. Immunoglobulin-containing cells appeared earlier in the tonsil than in the lymph node; this probably reflects the exposure of the tonsil to environmental antigens. IgG-containing cells predominated after the first 3 weeks of life, but the IgA:IgG ratio was much higher in the tonsil than in the lymph node. Extracellular, reticular staining was visible in the central region of some follicles in addition to a few immunoglobulin-containing cells that resembled large lymphocytes or blast cells.




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Copyright © 1976 by the American College of Veterinary Pathologists.