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Larval development of Dicrocoelium dendriticum in Cernuella (Xeromagna) cespitum arigonis under controlled laboratory conditions

Published online by Cambridge University Press:  05 June 2009

C. González-Lanza ,
M.Y. Manga-González ,
R. Campo  and
M.P. Del-Pozo
C. González-Lanza
Affiliation:
Departamento de Sistemas de Producción y Sanidad Animal, Estación Agrícola Experimental, Consejo Superior de Investigaciones Científicas (CSIC), Aptdo 788, 24080 León, Spain
M.Y. Manga-González
Affiliation:
Departamento de Sistemas de Producción y Sanidad Animal, Estación Agrícola Experimental, Consejo Superior de Investigaciones Científicas (CSIC), Aptdo 788, 24080 León, Spain
R. Campo
Affiliation:
Departamento de Sistemas de Producción y Sanidad Animal, Estación Agrícola Experimental, Consejo Superior de Investigaciones Científicas (CSIC), Aptdo 788, 24080 León, Spain
M.P. Del-Pozo
Affiliation:
Departamento de Sistemas de Producción y Sanidad Animal, Estación Agrícola Experimental, Consejo Superior de Investigaciones Científicas (CSIC), Aptdo 788, 24080 León, Spain
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Abstract

The larval development of Dicrocoelium dendriticum (Digenea: Dicrocoeliidae) in experimentally infected Cernuella (Xeromagna) cespitum arigonis (Schmidt, 1853), a species of mollusc important in the epidemiology of dicrocoeliosis in Spain, has been studied. A total of 948 specimens of this mollusc, distributed in five batches, were tested with individual doses of 50 to 150 parasite eggs, obtained from sheep, after 4 days without food. After infection these molluscs and control specimens were kept in an enviromental simulation chamber at 20°C, 50% relative humidity and 7h of light per day. To detect the parasite, a minimum of six molluscs were examined every 20 days from day 1 post-infection (p.i.). The eggs of D. dendriticum were eliminated in the molluscan faeces 48 h post infection. The percentages of molluscs harbouring the parasite ranged between 17.53% and 75%. Daughter sporocysts with undifferentiated germinal masses and occupying very reduced areas of the hepatopancreas were observed 50 days p.i. and in the period immediately following. After 110 days p.i. sporocysts with cercariae at different stages of development were found although slimeball emission was never observed.

Type
Research Papers
Information
Journal of Helminthology , Volume 71 , Issue 4 , December 1997 , pp. 311 - 318
Copyright
Copyright © Cambridge University Press 1997

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