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An effort was made to evaluate objectively all findings on the variability of fluke of the family Paramphistomatidae and to give a clear survey on the species occurring in this country in order to be able to control it successfully in the case of widespread occurrence of paramphistomatosis or its intermediate hosts. The individual fluke species have specific intermediate hosts and a correct determination can make preventive measurements easier. Three species of rumen fluke live parasitically in the CSSR: Paramphistomum cervi, P. ichikawai and P. daubneyi. Findings indicated as P. scotiae (and/or Liorchis scotiae) from Slovakia should be evaluated as P. cervi. Also P. leydeni is identical with the species P. cervi. All three species live parasitically on game. Domestic ruminants are parasitized by P. cervi and P. ichikawai. P. cervi is the most widespread species in this territory and also in the whole Central Europe. P. daubney is very rare in this territory; it was found only in moufflon.
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