| morphological and molecular characterization of renal ciliates infecting farmed snails in spain. | renal infections by parasitic ciliates were studied in adult snails of helix aspersa aspersa and helix aspersa maxima collected from 2 mixed rearing system-based heliciculture farms located in galicia (nw spain). the occurrence of ciliates was also examined in slugs (deroceras reticulatum) invading the greenhouses where first growing and fattening of snails is carried out. histological examinations revealed a severe destruction of the renal epithelium in heavily infected hosts. three ciliate iso ... | 2009 | 19402940 |
| parasitic infections in mixed system-based heliciculture farms: dynamics and key epidemiological factors. | heliciculture is an excellent alternative to obtain edible snails but its viability is seriously threatened by pathogens. a parasitological survey was conducted in 3 mixed system-based heliciculture farms in galicia (nw spain), with the species tetrahymena rostrata, tetrahymena limacis, tetratrichomonas limacis, cryptobia helicogenae, brachylaima aspersae (metacercariae and sporocysts), alloionema appendiculatum, nemhelix bakeri, and riccardoella limacum being commonly found infecting helix aspe ... | 2013 | 23279777 |
| encystment/excystment response and serotypic variation in the gastropod parasite tetrahymena rostrata (ciliophora, tetrahymenidae). | tetrahymena rostrata, which is characterized by a particular encystment-excystment cycle involving autogamy, has been recently found infecting the kidney of edible helix aspersa snails under farming conditions. in this work, the effects of several factors on its encystment/excystment behaviour and the occurrence of different serotypes were investigated. the encystment/excystment response under starvation conditions was seriously affected by temperature. while a peak of encystment at 48 h followe ... | 2016 | 26499199 |