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Specified Risk Material and Topographical Distribution of Lymphoreticular Tissue of the Bovine Tongue

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Abstract:

The elimination of specified risk material from food is crucial to restricting the risk to public health arising from bovine spongiform encephalopathy. The distribution of lymphoreticular tissue as potential specified risk material of the bovine lingual tonsil is described in relation to topographical anatomical landmarks. The definition of a proper landmark is a prerequisite for establishing adequate legal regulations concerning the removal of the lingual tonsil after slaughter. The main parameter to identify the lymphoreticular tissue in this study was the immunohistochemical identification of the follicular dendritic cells in the lingual tonsil. Lymph nodules were detected in areas up to 30 mm rostral of a given macroscopic landmark, i.e., the most caudal of the papillae vallatae. This area must therefore be adequately removed from the bovine tongue in the slaughterhouse. The current method for the removal of the lingual tonsil tissue according to Regulation (EC) 999/2001 at the slaughterhouse and alternatives to this method are discussed.

Document Type: Research Article

Affiliations: 1: Institute of Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany 2: Lower Saxony Federal State Office for Consumer Protection and Food Safety, Oldenburg, Germany 3: Institute for Food Quality and Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany. guenter.klein@tiho-hannover.de

Publication date: 2010-05-01

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