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A study of subclinical worm infestation in sheep: I. The effect of level of infestation on the growth of the lamb

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 experiment described confirmed earlier findings that a folding management across wormfree pasture was capable of preventing infection of the lamb by all species except Strongyloides papillosus.

2. The growth and productivity of lambs infected at five different levels were compared with those of ‘worm-free’ controls grazing with them.

3. Live-weight gain of the total infected group was significantly depressed; within the infected group only level 5 differed significantly from the control group.

4. Loss of productivity was, in this experiment, associated with egg counts between 30 and 57 e.p.g.

5. The problem of definig a ‘tolerance’ level below which no appreciable damage occurs is discussed in relation to the results obtained.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 48 , Issue 3 , February 1957 , pp. 286 - 293
Copyright
Copyright © Cambridge University Press 1957

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References

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