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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 100, No. 7, 2005, pp. 725-727
Bioline Code: oc05152
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 100, No. 7, 2005, pp. 725-727

 en SHORT COMMUNICATION- Variation of snail's abundance in two water bodies harboring strains of Pseudosuccinea columella check for this species in other resources resistant and susceptible to Fasciola hepatica check for this species in other resources miracidial infection, in Pinar del Río Province, Cuba
Alfredo Gutiérrez; Dagmar F Hernandez & Jorge Sánchez

Abstract

The abundance of freshwater snails in two rural sites of Pinar del Río, Cuba, which harbor Pseudosuccinea columella check for this species in other resources susceptible and resistant to miracidia of Fasciola hepatica check for this species in other resources was followed for one year. Susceptible snails were found in the most anthropic site (IPA) whereas the resistant population inhabited the most preserved one (El Azufre). Only two snail species coexisted with P. columella at IPA site ( Physa cubensis check for this species in other resources and Tarebia granifera check for this species in other resources ) while five species were found at El Azufre, including an endemic from that province ( Hemisinus cubanianus check for this species in other resources ). Populations of both resistant and susceptible snails showed stable densities throughout the year, although the susceptible strain attained higher abundance. The highest densities were observed in April-May 2004 for the susceptible population whereas the resistant strain attained its highest abundance in January 2004. No record of Fossaria cubensis was made and the thiarid T. granifera occurred only at low densities. One of the sampled sites (IPA) meets all the conditions for the first report of P. columella naturally infected with larvae of F. hepatica

Keywords
Pseudosuccinea columella - Lymnaeidae - freshwater snails - Fasciola hepatica - abundance - diversity - resistance - susceptibility - Cuba

 
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