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echinostome metacercariae cyst elimination in rana clamitans (green frog) tadpoles is age-dependent.host response to parasite exposure is an important determinant of the outcome of host-parasite interactions. factors such as host body condition and age can strongly influence host response to parasites and infection. this study followed echinostoma revolutum infection levels in larval green frogs (rana clamitans) exposed at 2 different ages. tadpoles at early developmental stages are more susceptible to the adverse effects of echinostomes. green frog tadpoles approximately 2 wk apart in age and ...200918850770
intermediate host availability masks the strength of experimentally-derived colonisation patterns in echinostome trematodes.a fundamental goal of parasite evolutionary ecology is to elucidate patterns of host use and determine the underlying mechanisms of parasite colonisation. in order to distinguish the relative contributions of host encounter rates and host compatibility to infection outcomes, we compared host use in both field and experimental laboratory settings. two years of bi-weekly snail sampling at a freshwater pond demonstrated fluctuating availability among three potential second intermediate snail host s ...200919026653
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 ...200919249307
genetic differentiation of echinostoma revolutum and hypodereaum conoideum from domestic ducks in thailand by multilocus enzyme electrophoresis.echinostomes are common intestinal parasites causing zoonotic disease, which are endemic worldwide. of the four species of medically important echinostomes reported in thailand, two species, echinostoma revolutum and hypodereaum conoideum, have been detected in poultry. these two parasites are morphologically similar and are sometimes difficult to distinguish. in the present study, multilocus enzyme electrophoresis was used to differentiate e. revolutum from h. conoideum collected from domestic ...201019712535
revealing the secret lives of cryptic species: examining the phylogenetic relationships of echinostome parasites in north america.the recognition of cryptic parasite species has implications for evolutionary and population-based studies of wildlife and human disease. echinostome trematodes are a widely distributed, species-rich group of internal parasites that infect a wide array of hosts and are agents of disease in amphibians, mammals, and birds. we utilize genetic markers to understand patterns of morphology, host use, and geographic distribution among several species groups. parasites from >150 infected host snails (ly ...201020064622
genetic characterization of echinostoma revolutum and echinoparyphium recurvatum (trematoda: echinostomatidae) in thailand and phylogenetic relationships with other isolates inferred by its1 sequence.echinostomatidae are common, widely distributed intestinal parasites causing significant disease in both animals and humans worldwide. in spite of their importance, the taxonomy of these echinostomes is still controversial. the taxonomic status of two species, echinostoma revolutum and echinoparyphium recurvatum, which commonly infect poultry and other birds, as well as human, is problematical. previous phylogenetic analyses of southeast asian strains indicate that these species cluster as siste ...201021120529
genetic variation and relationships of four species of medically important echinostomes (trematoda: echinostomatidae) in south-east asia.multilocus enzyme electrophoresis (mee) and dna sequencing of the mitochondrial cytochrome c oxidase subunit 1 (co1) gene were used to genetically compare four species of echinostomes of human health importance. fixed genetic differences among adults of echinostoma revolutum, echinostoma malayanum, echinoparyphium recurvatum and hypoderaeum conoideum were detected at 51-75% of the enzyme loci examined, while interspecific differences in co1 sequence were detected at 16-32 (8-16%) of the 205 alig ...201021129506
echinostoma revolutum infection in children, pursat province, cambodia.to determine the prevalence of helminthic infections in pursat province, cambodia, we tested fecal specimens from 471 children, 10-14 years of age, in june 2007. the prevalence of infection with echinostome flukes ranged from 7.5% to 22.4% in 4 schools surveyed. adult worms were identified as echinostoma revolutum.201121192870
allozyme analysis of the temporal populations of echinostoma revolutum collected from domestic ducks in khon kaen province, thailand.four temporal populations of echinostoma revolutum (er1, er2, er3, er4) were collected from domestic ducks in khon kaen province, thailand during february-october 2008. the er1, er2, er3 and er4 were collected in february, april, june and october, respectively. the 12 enzymes encoding 15 loci were examined. two loci were found in each of 3 enzymes, namely glucose-6-phosphate dehydrogenase (g6pd), malic enzyme (me) and peptidase valine-leucine (pepa). of these, three loci, namely, g6pd-1, me-1 an ...201121323163
spatial and temporal genetic variation of echinostoma revolutum (trematoda: echinostomatidae) from thailand and the lao pdr.a total of 314 individual echinostoma revolutum were collected at different locations and times from domestic ducks from khon kaen province, thailand and vientiane province, the lao people's democratic republic (pdr). genetic variation of these parasites was analyzed using multilocus enzyme electrophoresis at three polymorphic loci namely, glucose-6-phosphate dehydrogenase (g6pd), malic enzyme (me) and peptidase valine-leucine (pepa). high levels of genetic variability were found within and betw ...201121414285
echinostoma revolutum: metacercariae in filopaludina snails from nam dinh province, vietnam, and adults from experimental hamsters.we detected metacercariae of echinostoma revolutum in filopaludina sp. snails purchased from a local market in nam dinh province for the first time in vietnam. adult flukes were harvested from experimentally infected hamsters at days 14 and 17 post-infection. the metacercariae were round, 170-190 µm (n = 15) in diameter, with a cyst wall thickness of about 12 µm. a total of 37 collar spines were arranged around the head collar, and large excretory granules were seen in 2 canals of the excretory ...201122355218
occurrence and hat-rapd analysis of gastrointestinal helminths in domestic chickens (gallus gallus domesticus) in phayao province, northern thailand.the present study determined the prevalence and distribution of gastrointestinal helminths in domestic chickens (gallus gallus domesticus) between november 2012 and august 2013. one hundred and twenty domestic chickens were purchased from villages in four districts of phayao province; mae chai, dok khamtai, chun and chiang kham. morphological differences were used to identify the helminth species, and hat-rapd technique was used to differentiate among closely related species. the results reveale ...201728053568
prevalence of gastrointestinal helminths in banaraja fowls reared in semi-intensive system of management in mayurbhanj district of odisha.studies on the prevalence of gastrointestinal helminths infection in banaraja fowls of three blocks (chandua, shamakhunta and bangriposi) of mayurbhanj district in odisha with respect to semi-intensive system of rearing.201527065637
digenean communities in the tufted duck [aythya fuligula (l., 1758)] and greater scaup [a. marila (l., 1761)] wintering in the north-west of poland.a total of 124 specimens of the tufted duck, aythya fuligula, and 63 greater scaup, a. marila, were examined for digenean parasites. both duck species, which overwinter in a coastal lake connected with the southern baltic (north-west poland) were found to support amblosoma exile, cyathocotyle prussica, paracoenogonimus ovatus, australapatemon minor, cotylurus cornutus, echinoparyphium recurvatum, echinostoma revolutum and notocotylus attenuatus. in addition, the tufted duck hosted hypoderaeum co ...201322677200
larval trematode infections in lymnaea glabra populations living in the brenne regional natural park, central france.lymnaea glabra is known to be a natural intermediate host of two flukes, calicophoron daubneyi and fasciola hepatica, in central france. but it can also sustain larval development of other digeneans. adult snails were thus collected from 206 habitats in 2014 and 2015 to identify parasite species and determine the prevalence of each digenean infection in relation to the five types of snail habitats. seven digenean species were noted in 321 infected snails (out of 17,647 l. glabra). snails with f. ...201526692260
larval trematode infections in galba truncatula (gastropoda, lymnaeidae) from the brenne regional natural park, central france.adult galba truncatula ( ≥ 4 mm in shell height) were collected from 135 habitats for 3 years (2012-2014) to identify parasite species via the study of cercariae, and to determine the prevalence of each digenean infection in relation to the type of snail habitat (six types). a total of 323 infected snails and ten digenean species were noted in the bodies of 11,025 g. truncatula after their dissection. snails with calicophoron daubneyi and/or fasciola hepatica were found in 20.7% and 12.5% of the ...201625804319
the neuromuscular system in continuously swimming cercariae from belarus. ii echinostomata, gymnocephala and amphistomata.the neuromuscular system in cercariae of moliniella anceps, echinostoma revolutum, cathaemasia hians, psilochasmus oxyurus, sphaeridiotrema globulus, paramphistomum cervi and diplodiscus subclavatus was studied with immunocytochemical methods and confocal scanning laser microscopy. the patterns of f-actin in the musculature, 5-ht immunoreactive (ir), fmrfamide-ir neuronal elements and α-tubulin-ir sensory receptors were investigated. the general patterns of musculature, 5-ht- and fmrfamide-ir ne ...201222941527
trematodes recovered in the small intestine of stray cats in the republic of korea.in 2005, we reported the infection status of 438 stray cats with various species of intestinal helminths, including nematodes (4 species), trematodes (23 species), and cestodes (5 species) in the republic of korea. however, morphologic details of each helminth species have not been provided. in the present study, we intended to describe morphologic details of 13 trematode species which were either new fauna of cats (10 species) or new fauna of not only cats but also all animal hosts (3 species). ...201323467726
echinostome flukes receovered from humans in khammouane province, lao pdr.echinostome eggs were detected in 22 (1.1%) of 2,074 people residing in riparian villages along the mekong river in khammouane province, lao pdr. in order to recover the adult flukes, 9 persons were treated with praziquantel and purged with magnesium salts. a total of 55 echinostome specimens (4 species) were recovered from the 9 persons. echinostoma revolutum (8 specimens) was recovered from 3 persons, artyfechinostomum malayanum (8 specimens) was from 2 persons, echinochasmus japonicus (33 spe ...201222949759
zoonotic echinostome infections in free-grazing ducks in thailand.free-grazing ducks play a major role in the rural economy of eastern asia in the form of egg and meat production. in thailand, the geographical location, tropical climate conditions and wetland areas of the country are suitable for their husbandry. these environmental factors also favor growth, multiplication, development, survival, and spread of duck parasites. in this study, a total of 90 free-grazing ducks from northern, central, and northeastern regions of thailand were examined for intestin ...201324516271
host food resource supplementation increases echinostome infection in larval anurans.host-parasite interactions are often influenced by environmental factors through multiple mechanisms. for example, changes in host food resources may affect multiple host traits (e.g., body size, behavior, immunocompetence), which may increase or decrease infection levels and the impact of parasites on host fitness. we often lack an understanding of which traits are most important for parasite transmission and fitness effects, posing challenges to predicting consequences of changing environmenta ...201627581843
invasion of flukes of the echinostomatidae family in racing pigeon ( columba livia var. domestica) lofts.over 4 years, only two known cases of fluke invasions were diagnosed in racing pigeons ( columba livia ) originating from different regions of poland. in both cases, the invasion was characterized by a very high mortality (approximately 70%), and the source of the infestation was snails of the lymnaeidae family eaten by pigeons. fluke invasions in pigeons are extremely rare and to date have not been described in poland. therefore, the occurrence of the symptoms of hemorrhagic diarrhea and sudden ...201627309299
mitochondrial dna sequences of 37 collar-spined echinostomes (digenea: echinostomatidae) in thailand and lao pdr reveals presence of two species: echinostoma revolutum and e. miyagawai.the "37 collar-spined" or "revolutum" group of echinostomes is recognized as a species complex. the identification of members of this complex by morphological taxonomic characters is difficult and confusing, and hence, molecular analyses are a useful alternative method for molecular systematic studies. the current study examined the genetic diversity of those 37 collar-spined echinostomes which are recognized morphologically as echinostoma revolutum in thailand and lao pdr using the cytochrome c ...201526205690
mediterranean essential oils as effective weapons against the west nile vector culex pipiens and the echinostoma intermediate host physella acuta: what happens around? an acute toxicity survey on non-target mayflies.mosquitoes (diptera: culicidae) represent a threat for millions of people worldwide, since they act as vectors for important pathogens, including malaria, yellow fever, dengue and west nile. second to malaria as the world's most widespread parasitic disease, infection by trematodes is a devastating public health problem. in this study, we proposed two essential oils from plants cultivated in mediterranean regions as effective chemicals against mosquitoes and freshwater snails vectors of echinost ...201525563605
a re-assessment of species diversity within the 'revolutum' group of echinostoma rudolphi, 1809 (digenea: echinostomatidae) in europe.species of echinostoma rudolphi, 1809 (digenea: echinostomatidae) belonging to the 'revolutum' species complex were re-examined based on material gathered in an extensive sampling programme in eight countries in europe. the morphology of the life-cycle stages was studied in naturally and experimentally infected snail and bird hosts. a review, with an updated synonymy, is presented for six european species, including one new to science, i.e. echinostoma revolutum (frölich, 1802) (sensu stricto) ( ...201525557744
genetic characterization and phylogenetic analysis of echinostomes.we conducted this study to identify species and determine the phylogenetic relationships using ribosomal dna (rdna) sequences [partial sequences of 28s rdna and second internal transcribed spacer (it52)] of echinostomes collected from free-grazing ducks in phitsanulok province, thailand. four adult echinostomes were morphologically identified as echinostoma revolutum, 4 as hypoderaeulm conoideurn and 2 unidentified. sequences of other species/isolates of echinostomes retrieved from the genbank d ...201425417500
helminth parasites of the european starling (sturnus vulgaris) (aves, sturnidae), an invasive bird in argentina.the aim of this work is to contribute to the knowledge of gastrointestinal parasites of the european starling sturnus vulgaris, an invasive bird from argentina. seventy-six birds were collected during the spring of 2007 and were examined for helminths. six parasite species were found: one trematoda of the echinostoma revolutum "group," four nematodes (synhimantus nasuta, microtetrameres sp., pterothominx exilis, and ornithocapillaria ovopunctata), and one acanthocephalan (plagiorhynchus cylindra ...201424804922
echinostoma revolutum: freshwater snails as the second intermediate hosts in chiang mai, thailand.the occurrence of 37-collar spined echinostome metacercariae in freshwater snails was investigated in 6 districts of chiang mai province, thailand, from october 2011 to april 2012. a total of 2,914 snails that belong to 12 species were examined, and 7 snail species (clea helena, eyriesia eyriesi, bithynia funiculata, bithynia siamensis siamensis, filopaludina doliaris, filopaludina sumatrensis polygramma, and filopaludina martensi martensi) were found infected with echinostome metacercariae. the ...201323710085
parasite influences on host life history: echinostoma revolutum parasitism of lymnaea elodes snails.using field surveys and experimental infections, we investigated the influence of a trematode parasite on life history traits of adult lymnaea elodes snails. we found that parasitism significantly affected the growth, fecundity, and survival of host snails. within five of the six natural l. elodes populations we sampled, shell length of echinostome-infected hosts was significantly greater than for uninfected conspecifics. furthermore, we show that gigantism occurs among experimentally infected s ...199828308452
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