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A study of subclinical worm infestation in sheep: Part II. The ‘tolerance’ level of infestation

Published online by Cambridge University Press:  27 March 2009

C. R. W. Spedding  and
T. H. Brown
C. R. W. Spedding
Affiliation:
The Grassland Research Institute, Hurley, Berks.
T. H. Brown
Affiliation:
The Grassland Research Institute, Hurley, Berks.
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Extract

1. The live-weight gain of lambs initially infected at five different levels was compared with that of similar but worm-free animals, under conditions of set-stocking at a high rate per acre.

2. Over a period of 9 months the worm-free controls gained 67·7% more weight than the total infected group, but the live-weight gains of the five levels did not appear to be related to their original infection or to their egg counts.

3. Although a few nematode eggs were detected in the faeces of some control lambs, reinfection was negligible under the conditions of this experiment.

4. It was concluded that a marked depression of productivity may be associated with an egg count as low as 114 e.p.g. in sheep 4–7 months of age.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 49 , Issue 2 , August 1957 , pp. 223 - 228
Copyright
Copyright © Cambridge University Press 1957

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References

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