| larval trematode infections in freshwater gastropods from the albufera natural park in spain. | malacological samplings were made from january 1994 to december 1996 in the albufera natural park (valencia, spain) to trace the dynamics of molluscan populations and the prevalence and intensity of infection by larval trematodes. a total of 10,533 freshwater gastropods belonging to seven species (lymnaea auricularia, l. truncatula, l. palustris, l. peregra, bithynia tentaculata, physa acuta and gyraulus chinensis) was examined, and 110 (1.04%) were found to harbour some of the nine distinguisha ... | 1998 | 9639906 |
| production and chronobiology of emergence of the cercariae of euparyphium albuferensis (trematoda: echinostomatidae). | the production and the chronobiology of emergence of the cercariae of euparyphium albuferensis from gyraulus chinensis experimentally infected with a single miracidium were established during 28 consecutive days from the first day of cercarial shedding. moreover, the effect of a sudden change in light-dark cycling was investigated. although the daily cercarial shedding rates show great variability, a progressive increase in cercarial production was observed in the first weeks of the cercarial sh ... | 1999 | 10219306 |
| survival and infectivity of hypoderaeum conoideum and euparyphium albuferensis cercariae under laboratory conditions. | the survival characteristics of the cercariae of hypoderaeum conoideum and euparyphium albuferensis (trematoda: echinostomatidae) at 20 degrees c and 30 degrees c are described, and the age dependency of their infectivity at 20 degrees c is studied to determine their respective transmission efficiencies. cercarial survival was found to be age-dependent and was higher at 20 degrees c. for both cercariae, the maximum life-span was 26 h at 20 degrees c and 16 h at 30 degrees c, and their respective ... | 1999 | 10431379 |
| interactions related to non-host snails in the host-finding process of euparyphium albuferensis and echinostoma friedi (trematoda: echinostomatidae) miracidia. | in order to determine whether the miracidia of euparyphium albuferensis and echinostoma friedi are sensitive to their host snail (hs) and capable of discriminating between hs and non-host snails (nhs), or whether these nhs can interfere and thus reduce the infection rates (decoy effect), a total of three experiments were conducted with hs, nhs and snail-conditioned water (scw). gyraulus chinensis is the hs for e. albuferensis miracidia, while physa acuta, radix peregra and lymnaea fuscus are con ... | 2003 | 13680373 |
| euparyphium albuferensis and echinostoma friedi (trematoda: echinostomatidae): experimental cercarial transmission success in sympatric snail communities. | euparyphium albuferensis and echinostoma friedi cercarial infectivity to four species of sympatric snails was examined under single- or multiple-choice laboratory conditions to show the level of parasite-snail host compatibility. radix peregra, lymnaeafuscus, physella acuta and gyraulus chinensis act as second intermediate hosts of both parasite species although different cercarial transmission success (cts) was observed. in single-host experiments, r. peregra and p. acuta showed a high degree o ... | 2008 | 18666415 |
| sympatric and allopatric experimental infections of the planorbid snail gyraulus chinensis with miracidia of euparyphium albuferensis (trematoda: echinostomatidae). | an experimental infection with echinostomatid miracidia in sympatric or 'local' vs. allopatric or 'away' snail combinations, as a model to examine parasite compatibility, was carried out. we employed euparyphium albuferensis miracidia to infect gyraulus chinensis snails, from three different natural parks: albufera (valencia, spain); the ebro delta (tarragona, spain) and coto de doñana (huelva, spain). insignificant differences between the three snail strains were noted for the infection rate an ... | 2010 | 20236558 |
| molecular analysis of echinostome metacercariae from their second intermediate host found in a localised geographic region reveals genetic heterogeneity and possible cryptic speciation. | echinostome metacercariae are the infective stage for humans and animals. the identification of echinostomes has been based until recently on morphology but molecular techniques using sequences of ribosomal rna and mitochondrial dna have indicated major clades within the group. in this study we have used the its2 region of ribosomal rna and the nd1 region of mitochondrial dna to identify metacercariae from snails collected from eight well-separated sites from an area of 4000 km2 in lamphun provi ... | 2014 | 24699358 |