Document Detail

Effects of host habitat quality on the viability of Cryptocotyle lingua (Trematoda: Digenea) cercariae.
MedLine Citation:
PMID:  15727069     Owner:  NLM     Status:  MEDLINE    
In an earlier study it was shown that Cryptocotyle lingua cercariae, matured in Littorina littorea from a polluted marine lagoon, displayed slower horizontal swimming rates, and reduced longevity compared to cercariae released by periwinkles from a cleaner environment. This work investigated whether the pollution-induced reduction in swimming rates was due to an inefficient swimming action or the adoption of a less direct swimming path. In addition, cercariae from L. littorea that had been transferred from an 'unpolluted' to a 'polluted' site for 1 month provided information on the speed with which pollutants affect cercariae through their intermediate hosts. Results indicated that, in general, horizontal swimming rates were reduced due to slower swimming rather than disorientation and longer swimming pathways. Effects of host transplantation to a polluted site were clearly evident after 1 month. Evidence suggested that the pollutants accumulated by the cercariae via their first intermediate host affected the neuromusculature associated with swimming performance rather than sensory structures. Bearing in mind the reduced viability of C. lingua cercariae in polluted sites it is assumed that high prevalence of this digenean in gastropods (at such sites) must be due to their continual introduction by infected birds attracted to these habitats from other areas.
M A Cross; S W B Irwin; S M Fitzpatrick
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Parasitology     Volume:  130     ISSN:  0031-1820     ISO Abbreviation:  Parasitology     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-02-24     Completed Date:  2005-04-05     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0401121     Medline TA:  Parasitology     Country:  England    
Other Details:
Languages:  eng     Pagination:  195-201     Citation Subset:  IM    
School of Biological Sciences, The University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB.
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MeSH Terms
Host-Parasite Interactions
Mollusca / parasitology*
Proportional Hazards Models
Swimming / physiology
Trematoda / drug effects,  growth & development,  physiology*
Trematode Infections / parasitology*
Water Pollutants, Chemical / poisoning*
Reg. No./Substance:
0/Water Pollutants, Chemical

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