Incidence of bovine spongiform encephalopathy is higher in cows born after feed ban

doi:10.1136/bmj.312.7034.843b

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M Bennett

Lecturer Environmental Technology Centre, Department of Chemical Engineering, UMIST, PO Box 88, Manchester M60 1QD

EDITOR,—R W Lacey could have made more of the data on the ages of cattle with bovine spongiform encephalopathy that he discusses.1 The ban on the inclusion of recycled animal remains in agricultural feeds came into force in July 1988. Many calves born before this date might be expected eventually to develop the disease; those born later should have a greatly reduced, and diminishing, incidence of the disease. In his table …