| Article title |
Fasciola hepatica and Paramphistomum daubneyi: changes in prevalences of natural infections in cattle and in Lymnaea truncatula from central France over the past 12 years |
| Journal |
Veterinary Research 33(5);2002 |
| Year |
2002 |
| Pages |
439 - 447 |
| Language |
en |
| Copyright |
INRA,EDP Sciences |
| PDF document |
 Vet.Res._0928-4249_2002_33_5/Vet.Res._0928-4249_2002_33_5_ART0001.pdf |
| Abstract |
A retrospective study was carried out over a 10- to 12-year period to analysethe changes in prevalences of natural fasciolosis and paramphistomosis amongcattle and snails in central France, and to determine the causes which had inducedthese changes. The prevalences of natural fasciolosis in cattle increased from1990 to 1993 (13.6% to 25.2%) and diminished afterwards up to 1999 (at 12.6%).Those of natural paramphistomosis showed a progressive increase between 1990and 1999 (from 5.2 to 44.7%). The prevalences of natural infections and thenumbers of free rediae counted in the snails () infectedwith did not show any significant variations over time.By contrast, the prevalences of natural paramphistomosis in snailssignificantly increased from 1989 to 1996 and remained afterwards inthe same range of values (3.7-5.3%), while the number of free rediaesignificantly increased up to 2000 (from a mean of 6.5 to 13.8 rediaeper infected snail, respectively). Three hypotheses may explain the increaseof paramphistomosis in cattle and snails: a better quality of diagnosis forthe detection of eggs in veterinary analysis laboratories,the use of specific molecules in the treatment of cattle fasciolosis since 1993,and the lack of an effective treatment up to now against cattle paramphistomosis.Since the objective of most farmers in central France is to obtain thehighest antiparasitic efficiency with a single treatment of cattle per year,it is reasonable to assume that the prevalence of bovine paramphistomosiswill continue to increase in the future. |
| Keywords |
cattle,fasciolosis,Limousin region,paramphistomosis |