Shortening of the bovine tongue according to regulation (EC) 999/2001 is not complying with the current legal definition of specified risk material - a macroscopical and histological preliminary study.
The full elimination of all specified risk material (SRM) in food of animal origin is crucial for consumer protection and is of high priority in inner EU trade. Among other tissues, the tonsils of cattle are considered as SRM. The aim of this study was to evaluate whether the 'cut at the back of the tongue just before the tongue bones' required by EC regulation is sufficient to remove tonsils and lymphatic tissue completely. Eight skulls from cattle were collected for the simulation of a vertical cut according to the EC regulation and the detection of the target at the back of the tongue. Further, specimens of the lingual mucosa were cut out from two tongues and examined microscopically. The most caudal of these specimens was from the macroscopically visible part of the lingual tonsil. The most rostral specimen contained the most caudal Papilla vallata. Simulation of the obligatory ventro-dorsal cut yielded hits at varying locations on the dorsal surface of the tongue, sometimes including tissue of the lingual tonsil. Histological examination of the lingual mucosa gave clear evidence that lymphatic tissue resembling the tissue of a tonsil in terms of its histological organization and infiltration of the mucosal epithelium could even be found in areas with no macroscopically visible lingual tonsils.
Kühne
M
M
Institute for Food Quality and Safety, Institute for Anatomy, University of Veterinary Medicine, Bischofsholer Damm 15, D-30173 Hannover, Germany. michael.kuehne@tiho-hannover.de
Klein
G
G
Gasse
H
H
D000003:Abattoirs; D000818:Animals; D002417:Cattle / Q000601:surgery*; D003257:Consumer Product Safety; D005062:European Union; D006801:Humans; D014066:Palatine Tonsil / Q000473:pathology / Q000601:surgery*; D014059:Tongue / Q000033:anatomy & histology / Q000601:surgery*; D014068:Tonsillectomy / Q000592:standards / Q000662:veterinary*