| [effect of different concentrations of heavy metal ions on the normal physical and chemical characteristics of the hemolymph of palanorbarius purpura (mollusca: bulinidae) in the norm and during a trematode infection]. | short-term simultaneous effect of high concentrations (lc25, lc50, lc75) of heavy metal ions. (cu2+, zn2+, cd2+ and pb2+) and infection with trematode partenites echinoparyphium aconiatum onto haemolymph of mollusk has been investigated. it was noted that low doses of toxicant (2.5 and 10 maximum admitted concentrations) have variable effect. in infected molluscs the concentration of haemoglobin decreases, while in intact ones it increases. in relation to this index, it was found, that the ion c ... | 2002 | 12070959 |
| phylogenetic relationships of echinostoma rudolphi, 1809 (digenea: echinostomatidae) and related genera re-assessed via dna and morphological analyses. | in order to investigate the relationships within the echinostomatidae two data sets of gene sequences were analysed. the first consisted of all previously published nd1 sequences (20) together with 17 new sequences. the latter represented six species from the cosmopolitan genera echinostoma, echinoparyphium, hypoderaeum and isthmiophora. the second data-set of its sequences again included all previously published sequences (12) and three new sequences from species of echinostoma, echinoparyphium ... | 2003 | 12652069 |
| differences in shell shape of naturally infected lymnaea stagnalis (l.) individuals as the effect of the activity of digenetic trematode larvae. | the shells of lymnaea stagnalis show great morphological variability. this phenomenon has been described as the result of an environmental influence. the main object of the present study was to compare some biometric data from shells of naturally infected and uninfected snails from 25 different lakes in the central part of poland. the height of the shell, the height of the spiral, and the width of the shell were measured. some inter- and intrapopulation differences among individuals were found. ... | 2005 | 16419747 |
| the spatial relationship between the musculature and the nadph-diaphorase activity, 5-ht and fmrfamide immunoreactivities in redia, cercaria and adult echinoparyphium aconiatum (digenea). | the spatial relationship between the musculature and the nadph-diaphorase (nadph-d) activity, 5-ht and fmrfamide immunoreactivities in redia, cercaria and adult echinoparyphium aconiatum was studied using scanning electron microscopy (sem), nadph-d histochemistry, immunocytochemistry, and confocal scanning laser microscopy (cslm). tritc-conjugated phalloidin was used to stain the musculature. staining for nadph-d was observed in the central (cns) and peripheral nervous system (pns) of all three ... | 2006 | 16494908 |
| larval trematodes in freshwater molluscs from the elbe to danube rivers (southeast germany): before and today. | studies on life cycles of trematodes have a long tradition in germany; (odening 1978) listed a total of 177 trematodes, which can potentially complete their life cycles in german inland waters. however, almost no recent data on the occurrence of larval stages in molluscs are available. therefore, a survey of trematodes in southeast germany was carried out in 2004. a total of 31 species of ten families (29 species of cercariae, seven species of metacercariae, and five species found of both) were ... | 2006 | 16670883 |
| temporal variation in prevalence and abundance of metacercariae in the pulmonate snail lymnaea stagnalis in chany lake, west siberia, russia: long-term patterns and environmental covariates. | infrapopulations of trematode metacercariae were monitored in the snail lymnaea stagnalis over 17 yr (1982-1999) at chany lake, novosibirskaya oblast', russia. eighteen trematode species were recorded. patterns of occurrence varied from 4 species (echinoparyphium aconiatum, echinoparyphium recurvatum, moliniella anceps, and cotylurus cornutus) that persisted at relatively high prevalence (> 60% of samples) across sites, seasons, and years, to species that were very rare and sporadic in occurrenc ... | 2006 | 16729680 |
| larval trematodes (digenea) of the great pond snail, lymnaea stagnalis (l.), (gastropoda, pulmonata) in central europe: a survey of species and key to their identification. | a survey of cercariae and metacercariae (trematoda, digenea) from the great pond snail (lymnaea stagnalis) in central europe (austria, czech republic, south-east germany, poland and slovak republic) is presented, based on a study of 3,628 snails examined from 1998 to 2005. a total of 953 (26.3%) l. stagnalis were infected with 24 trematode species comprising 19 species of cercariae and 11 species of metacercariae (six species occurred both as cercarie and metacercarie) of eight families. the dom ... | 2007 | 17432056 |
| larval trematodes (digenea) of planorbid snails (gastropoda: pulmonata) in central europe: a survey of species and key to their identification. | a survey of the larval stages (cercariae and metacercariae) of trematodes (digenea) found in planorbid snails in central europe (austria, czech republic, south-east germany, hungary, poland and the slovak republic) is presented based on a study of 7,628 snails of 12 species examined between 1998-2006. a total of 34 trematode larval stages, comprising cercariae of 28 species and metacercariae of seven species (one species occurred both as cercaria and metacercaria) of nine families were found in ... | 2008 | 18210216 |
| digenea species in chosen populations of freshwater snails in northern and central part of poland. | background: the aim of this work was to determine the biodiversity of digenean larvae in the snail populations from various water bodies. material and methods: snails under study were collected from 29 reservoirs situated in northern and central part of poland. during the period 1999-2005 10.581 snails from 6 species (among which two species dominated: lymnaea stagnalis--9.469, and planorbarius corneus--737 specimens) were examined for shedding cercariae. the total number of 4.404 molluscs was p ... | 2007 | 18441876 |
| the pattern of serotonin and fmrfamide in cercaria from different taxonomic groups--a preliminary study. | serotoninergic and fmrfamidergic components of the nervous system were examined in cercaria from different types using immunocytochemical techniques interfaced with confocal scanning laser microscopy. cercariae from 9 families were studied - opisthorchis felineus, parafasciolopsis fasciolaemorpha, echinochasmus coaxatus, echinoparyphium aconiatum, notocotylus attenuatus, psilotrema tuberculata, plagiorchis sp., cyathocotyle bithyniae, diplostomum chromatophorum. the results show that 5-ht-ir and ... | 2008 | 18652395 |
| [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)]. | 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 ... | 2008 | 19198174 |
| invaders of an invader--trematodes in potamopyrgus antipodarum in poland. | the subject of the following study was the natural and experimental invasion of trematode larvae in potamopyrgus antipodarum from bory tucholskie national park (poland). only one out of the 14,908 dissected specimens had oval sporocysts and mature cercariae of fish fluke, which belongs to the sanguinicolidae family. it is the first recorded case in the european population of p. antipodarum living in inland water. the experimental study showed the possibility of native metacercariae (echinostoma ... | 2009 | 19249307 |
| [activity of detoxifying and antioxidant enzymes in the pond snail lymnaea stagnalis (gastropoda: pulmonata) during invasion by trematode cercariae]. | a comparative analysis of changes of activities of detoxifying and antioxidant enzymes was carried out in the body homogenate of the pond snail lymnaea stagnalis. juvenile snails with the shell size of 4-6 mm were infested with cercariae of one (echinoparyphium aconiatum or e. recurvatum or moliniella anceps) or two (e. aconiatum +m. anceps or e. aconiatum + e. recurvatum or e. recurvatum + m. anceps) trematode species. it has been revealed that activities of detoxifying and antioxidant enzymes ... | 2010 | 20297666 |
| [influence of trematode invasion and zinc ions on the histometric peculiarities of haemocytes and some hematological indices of planorbarius purpura (gastropoda: pulmonata: bulinidae)]. | cellular components of the planorbarius purpura hemolymph are represented by three phyla of haemocytes (prohemocytes, eosinophilis microgranulocytes, and basophilis granulocytes) and vesicular cells. as a result of the invasions of p. purpura with the trematode echinoparyphium aconiatum, changes of the linear dimensions of granular hemocytes and their nuclei took place. moreover, an increase of the hemocytes' number per l mm3 of hemolymph and change of the percentages of different hemocyte types ... | 2010 | 20349633 |
| in vivo efficacy of praziquantel against echinoparyphium aconiatum (trematoda: echinostomatidae) parasitizing the great pond snails lymnaea stagnalis (gastropoda: lymnaeidae). | the present study had a practical goal. i aimed to determine whether praziquantel could reduce the production of echinoparyphium aconiatum (trematoda: echinostomatidae) cercariae in infected snails lymnaea stagnalis (gastropoda: lymnaeidae) without killing the hosts. praziquantel is a broad-spectrum antihelminth agent. it caused a total cessation of cercaria shedding when the praziquantel concentration in the treatment bath was 10mg/l and the treatment time was 30h or longer. a next research ste ... | 2011 | 21756908 |
| digenean larvae--the cause and beneficiaries of the changes in host snails' thermal behavior. | parasite-induced changes in host's thermal preferences not only can be interpreted as a physiological defense response of the host but also can represent a pathological manifestation of the parasite. both may become established in host-parasite relationships if they are beneficial for at least one of the counterparts. this study investigates parasite-induced changes in the thermoregulatory behavior of first intermediate hosts of digenea (i.e. lymnaea stagnalis and planorbarius corneus), infected ... | 2015 | 25563607 |
| infection success of echinoparyphium aconiatum (trematoda) in its snail host under high temperature: role of host resistance. | extreme weather events such as summer heat waves become more frequent owing to global climate change and are predicted to alter disease dynamics. this is because high temperatures can reduce host immune function. predicting the impact of climate change on host-parasite interactions is, however, difficult as temperature may also affect parasite infective stages and other host characteristics determining the outcome of interaction. | 2014 | 24754889 |