Lamb dysentery : an account of some experimental field work in 1925 and 1926 / by T. Dalling.

  • Dalling, Thomas.
Date:
[1926?]
Catalogue details

Licence: In copyright

Credit: Lamb dysentery : an account of some experimental field work in 1925 and 1926 / by T. Dalling. Source: Wellcome Collection.

    15/24 page 157
    Chart 2 summarises the results on all farms on which the ewes received one inoculation between two and four weeks before lambing. Amongst 8497 lambs born of 7223 inoculated mothers, 456, i.e,, 5 *34 per cent., died of dysentery; amongst 5131 control lambs from 4633 uninoculated mothers 605 died, f.^., 11*59 per cent. In Table VII. are shown the results obtained on farms under close supervision. On twenty-two farms where our supervision was less close and where the majority of, but not all, the dead lambs were examined post¬ mortem, the mortality amongst 5887 lambs born of 4927 inoculated mothers was 4*19 per cent., while amongst 3262 lambs from 2950 uninoculated mothers the mortality was 9*66 per cent. On three distant farms which were not under our constant supervision and on which we rejected the controls, the mortality amongst 501 lambs was 8'gS per cent.
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