The examination of 59,371 pig carcases in slaughterhouses revealed tha
t 10% were classified as unfit because of the detection of Mycobacteri
a spp in mesenteric lymph nodes. The importance of this finding is dis
cussed. The results indicate that peat is a significant source of infe
ction, especially when peat is used as a supplement the treatment of d
iarrhoeal disease in pigs.