The epidemiology of parasitic gastritis in sheep. Observations on the relative importance of the various factors concerned in the development of the disease

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Abstract
The most obvious lines of investigation for the discovery of some method of controlling parasitic gastritis in lambs are those which endeavour to find a means either of killing the parasitic worms in the stomach and intestine, or of destroying the free-living larval stages which are present in the soil. Both of these lines have been diligently followed by research workers in different countries throughout the world, numerous drugs have been tried for the cure of affected sheep and many substances tried for ridding the land of infective larvae; but apart from treatment with copper sulphate or carbon tetrachloride, to which only Haemonchus contortus responds, none has given promise of success.