Abstract
MAY I be allowed to add a few words to the discussion on Limnæa peregra and the liver rot of sheep, etc. First with regard to outbreaks of the disease following the application of lime. During a considerable experience of Mid and North Wales I have had a number of such cases brought to my notice by farmers (in one case basic slag had been used). In all cases the dressings had been applied to rough wet pastures of the “sour” type, which are not grazed closely by stock. In parts of these fields L. truncatula was present, but, owing to light grazing of the abundant herbage, the encysted cercariæ had presumably not been ingested. Following an application of lime, a “sweetening” or improvement of the pasturage leads to closer grazing and a more or less intense infection of the stock. This, at any rate, is my opinion following the investigation of actual cases.
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WALTON, C. Soil Reaction, Water Snails, and Liver Flukes. Nature 111, 117 (1923). https://doi.org/10.1038/111117a0
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DOI: https://doi.org/10.1038/111117a0
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