Abstract
Extract Recent surveys carried out by the Veterinary Investigation Service in Britain ( 1959 Veterinary Investigation Service. 1959. Vet. Rec, 71: 777–777. [Google Scholar] , 1960 Veterinary Investigation Service. 1960. Vet. Rec., 72: 1240–1240. [Google Scholar] ) into the causes of mortality in pigs confirmed the general impression that, in spite of advances in therapy and prophylaxis during the last 20 years, the mortality rate in piglets below 8 weeks of age is still in the region of 25 per cent of live births, a figure depressingly similar to, and indeed somewhat above, that obtained by Menzies-Kitchin ( 1937 Menzies-Kitchin, A.W. 1937. J. agric Sci., 27: 611–611. [Google Scholar] , 1938 Menzies-Kitchin, A.W. 1938. Pig Breeders' Annual, 18: 35–35. [Google Scholar] ) before the war. The surveys also analysed all deaths by age groups, organs affected and aetiological agent, in an attempt to define as precisely as possible the disease problems in British pigs.

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