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New histochemical and ultrastructural observations on normal bovine tonsils
  1. M. Velinova, MD, PhD1,
  2. C. Thielen, MSc1,
  3. F. Mklot, MSc1,
  4. S. Eicher, MSc1,
  5. E. Heinen, PhD1,
  6. N. Antoine, PhD1 and
  7. J. Donga2
  1. 1 Institute of Human Histology, University of Liege, Rue de Pitteurs 20, BAT L3, B-4020 Liege, Belgium
  2. 2 University and University Hospital of Groningen, Groningen, The Netherlands


Samples of normal bovine palatine tonsils were examined by light and electron microscopy. Like human tonsils, they were composed of crypts, subepithelial areas, follicles, and T-dependent zones, but their welldeveloped capsule subdivided the lymphoid tissue by connective septa. B cells formed the major lymphoid component. The follicles and T-dependent zones had morphological and histochemical features typical of peripheral lymph organs. Follicular dendritic cells were isolated and shown to be similar to human follicular dendritic cells.

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