title: [An activity of nonspecific esterases in homogenates of Lymnaea stagnalis and Lymnaea tumida snails (Gastropoda: Pulmonata) infected by trematode cercariae Echinoparyphium aconiatum and Moliniella anceps (Echinostomatidae)].
abstract: The comparative analysis of esterase changes in homogenates of the snails Lymnaea stagnalis and L. tumida bodies was carried out. Juvenile snails with shell size 2 mm, 3-4 mm, 5-6 mm and 7-8 mm were exposed to cercariae of the trematodes Echinoparyphium aconiatum and/or Moliniella anceps. The esterase activity was detected spectrofotometrically. The highest level of esterase activity in noninfected L. stagnalis was registered in snails with shell size 3-4 mm. The invasion of snails by trematode cercariae results in a change of esterase activity in the tissues of infected snails. The activity of easterases was increased in the infected L. stagnalis snails with shell size 5-8 mm at 2 days post invasion in comparison with control. The decrease of esterase activity in tissues of infected snails L. stagnalis (3-4 mm) and L. tumida (4 mm) was observed at 26 days post invasion by E. aconiatum only. The host size and parasite species was influenced on esterase activity in the snails.
authors.forename: Ia L
authors.initials: IaL
authors.lastname: Vorontsova
authors.forename: N I
authors.initials: NI
authors.lastname: Iurlova
authors.forename: S N
authors.initials: SN
authors.lastname: Vodianitskaia
authors.forename: V V
authors.initials: VV
authors.lastname: Glupov
mesh_terms: D000818:Animals; D004450:Echinostomatidae; D004950:Esterases / Q000378:metabolism*; D049851:Gastropoda / Q000033:anatomy & histology / Q000201:enzymology* / Q000469:parasitology*; D006790:Host-Parasite Interactions; D013997:Time Factors
chemical_list: D004950:Esterases