Behavior of Angiostrongylus costaricensis in planorbids

Some terrestrial mollusks are natural hosts of Angiostrongylus costaricensis. In the laboratory, this nematode can be maintained in certain planorbids, which are aquatic mollusks and intermediate hosts of Schistosoma mansoni. Mollusks can be infected with Angiostrongylus costaricensis by ingestion o...

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Bibliographic Details
Published in:Brazilian journal of biology 2006-02, Vol.66 (1B), p.199-204
Main Authors: Banevicius, N M S, Zanotti-Magalhães, E M, Magalhães, L A, Linhares, A X
Format: Article
Language:English
Subjects:
Angiostrongylus
Angiostrongylus - physiology
Angiostrongylus costaricensis
Animals
Animals, Genetically Modified - parasitology
Behavior, Animal - physiology
BIOLOGY
Biomphalaria - genetics
Biomphalaria - parasitology
Biomphalaria glabrata
Biomphalaria tenagophila
Host-Parasite Interactions - genetics
Host-Parasite Interactions - physiology
Larva - physiology
Schistosoma mansoni
Time Factors
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Summary:Some terrestrial mollusks are natural hosts of Angiostrongylus costaricensis. In the laboratory, this nematode can be maintained in certain planorbids, which are aquatic mollusks and intermediate hosts of Schistosoma mansoni. Mollusks can be infected with Angiostrongylus costaricensis by ingestion of or active penetration by the first-stage larvae. In this work we assessed the ability of Biomphalaria glabrata to attract first-stage larvae of A. costaricensis. Movement of the nematode larvae towards the mollusks was observed after 15 min, 30 min and 1 h. B. glabrata did not attract the first-stage larvae of A. costaricensis in any of the three intervals. The susceptibility of two populations of Biomphalaria tenagophila to infection by A. costaricensis was also determined. One population was genetically selected for the susceptibility to S. mansoni while the other was not. Third-stage larvae were recovered from the snails 30 days after exposure of the two populations to 120 first-stage larvae. All the mollusks were infected. However, a significantly higher number of third-stage larvae were recovered in mollusks not genetically selected.
ISSN:1519-6984
1678-4375
1519-6984
DOI:10.1590/S1519-69842006000200003