experimental infection of physa heterostropha, helisoma trivolvis, and biomphalaria glabrata (gastropoda) with echinostoma revolutum (trematoda) cercariae.gross and histologic studies were done on laboratory-raised physa heterostropha, helisoma trivolvis, and biomphalaria glabrata snails exposed individually to 100 cercariae of echinostoma revolutum. cercariae showed a predisposition for the kidneys of snails. they entered the nephridiopore, migrated up the tubular kidney, and encysted in the saccular kidney within 2 hr. considerably more cysts were in the kidney of b. glabrata at 24 hr than in h. trivolvis or p. heterostropha kidneys. encysted me ...19873572665
infectivity and growth of echinostoma revolutum (froelich, 1802) in the domestic chick.infectivity and growth studies in domestic chicks were carried out on a strain of echinostoma revolutum isolated from lymnaea elodes snails in indiana, u.s.a. of 21 chicks, each fed 40 +/- 10 cysts of echinostoma revolutum, 16 (64%) were infected with a total of 269 (32%) worms from approximately 840 cysts. worms were found only in the ceca and rectum at 2-14 days p.i. in vivo excysted metacercariae were obtained in the lower ileum and ceca at 4 h p.i. excysted metacercariae averaged 0.2 mm in l ...19979076539
zoonotic echinostome infections in free-grazing ducks in 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
infectivity, growth and development of echinostoma revolutum (trematoda) in the domestic chick.infectivity, growth and development were studied in 23 one-day-old domestic chicks each fed 25 pre-selected metacercarial cysts of echinostoma revolutum. all chicks were infected at necropsy one to 44 days post-exposure with one to 18 flukes/chick. from the 575 cysts fed to chicks, 145 (25%) flukes were recovered from the ileum, caeca, rectum-cloaca and bursa of fabricius. length measurements on 113 uncurled flukes fixed in hot alcohol-formalin-acetic acid showed that worms grew slowly to 1.0 mm ...19846501857
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
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
do larvae of trichobilharzia szidati and echinostoma revolutum generate behavioral fever in lymnaea stagnalis individuals?the objective of this study was to determine whether individuals of lymnaea stagnalis naturally parasitized with trichobilharzia szidati and echinostoma revolutum can generate the behavioral fever against larvae of those parasites. thermal preferences of each snail were examined in an oblong thermal gradient during 48 h observation. uninfected animals under study chose higher temperatures than those releasing cercariae of parasites. infected snails kept in constant temperature lived shorter than ...200515952039
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
thymus-independent crypt hyperplasia and villous atrophy in the small intestine of mice infected with the trematode echinostoma revolutum.conventional mice and congenitally athymic, nude mice were infected with 20 metacercariae of the intestinal trematode echinostoma revolutum. the sequential events in the pathological changes in the intestine were studied at different intervals post-infection. by day 11 onwards the conventional mice displayed dilatation of the region of the intestine which harboured the parasites. the mucosa in the dilated region showed marked crypt hyperplasia, villous atrophy and subepithelial fibrosis as the m ...19846739130
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
localization, length and reproduction in single- and multiple-worm infections of echinostoma revolutum (trematoda) in the chick.mono-metacercarial infections of echinostoma revolutum in the domestic chick yielded 14- or 15-day-old worms that produced viable eggs, indicating that this species can self-fertilize under conditions which preclude cross-fertilization. in multiple infection studies, chicks were fed either 5 or 10 cysts and each infected chick contained 2-7 worms at necropsy 14 or 15 days later. worms from multiple infections were mainly paired or clustered and they tended to locate more posteriorly in the intes ...19817208104
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 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
mitochondrial nd1 gene sequences used to identify echinostome isolates from australia and new zealand.echinostomes were collected in australia and new zealand as cercariae, metacercariae or adults. using dna sequences from the mitochondrial nd1 gene echinostoma revolutum and echinostoma paraensei were discovered in australia. the presence of a further five, as yet unidentified, echinostome species was inferred in northern australia and a further isolate, closely allied to e. revolutum, occurs in new zealand. nd1 sequences of species within the genus diverge from each other by 9.6-30.8%. sequence ...19989559367
chemo-orientation of echinostome cercariae towards their snail hosts: amino acids signal a low host-specificity.the cercariae of pseudechinoparyphium echinatum and echinostoma revolutum approach their intermediate host snails by turning back when swimming in decreasing concentration gradients of snail conditioned water. host stimuli are small molecular amino compounds, probably amino acids. this response was inhibited reversibly when the cercariae were treated with 0.45 microm-silver nitrate. as silver nitrate binds to the ciliated papillae of the cercarial surface, papillar chemoreceptors may be involved ...19989559369
trematodes recovered in the small intestine of stray cats in the republic of 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
host food resource supplementation increases echinostome infection in larval 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
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
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
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
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
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