| Autor: |
Lie, Kian Joe, Basch, Paul F., Heyneman, D. |
| Zdroj: |
Parasitology Research; June 1968, Vol. 31 Issue: 2 p101-107, 7p |
| Abstrakt: |
Antagonism between the Brazilian parasites Paryphostomum segregatumDietz and Echinostoma paraenseiLie and Basch was studied in the snail Biomphalaria glabrata (Say). Snails harbouring E. paraensei were easily super-infected with P. segregatum. Developing P. segregatum rediae killed and ate E. paraensei larvae, eventually clearing the snails of the second parasite except for metacercariae formed in the viscera. The indirect antagonism exerted by E. paraensei upon the invading P. segregatum larvae delayed their development. Double infections were readily obtained by simultaneous exposure of the snails to both parasites, but E. paraensei larvae developed in the ventricle for a limited period only. When E. paraensei were superimposed upon P. segregatum, double infections developed only in snails whose second exposure was within 8 days and E. paraensei larvae then developed in the heart for a limited period only. |
| Databáze: |
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| Externí odkaz: |
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