| finding and recognition of the snail intermediate hosts by 3 species of echinostome cercariae. | finding and recognition of snail second intermediate hosts was studied in cercariae of 3 echinostome species. the cercariae of the 3 species accumulated in snail-conditioned water (scw) with 2 types of orientation mechanisms and responded to different small molecular weight ( < 500 da) components of scw. pseudechinoparyphium echinatum and echinostoma revolutum cercariae returned by swimming an arc, when swimming in decreasing concentration gradients of scw (turn-back swimming). the stimulating c ... | 1995 | 7885732 |
| 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 ... | 2014 | 25417500 |
| 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 ... | 2014 | 24804922 |
| the occurrence and identification of echinostoma revolutum from north american lymnaea elodes snails. | lymnaea elodes snails collected in northern indiana, u.s.a., were infected with larval stages of an echinostome bearing 37 collar spines and resembling members of the echinostoma group. the taxonomic status of this digenean was determined through experimental infections of various definitive and first-intermediate hosts. in addition, characteristics of the penetration and paraesophageal glands in cercariae from this echinostomatid were compared with those from e. revolutum and e. trivolvis. resu ... | 1997 | 9057720 |
| 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 ... | 1997 | 9076539 |
| in vivo and ectopic encystment of echinostoma revolutum and chemical excystation of the metacercariae. | in vivo and ectopic encystment of the cercariae of echinostoma revolutum from lymnaea elodes snails in indiana and chemical excystation of the metacercariae were studied. in vivo encystment occurred in adults of biomphalaria glabrata and helisoma trivolvis (colorado strain) snails and in neonatal and juvenile l. elodes snails. these results were expected because 37-collar-spined echinostoma species show broad specificity in their second intermediate gastropod hosts. encysted metacercariae of e. ... | 1997 | 9105306 |
| 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 ... | 2005 | 15952039 |
| infection status with helminthes in feral cats purchased from a market in busan, republic of korea. | the present study was performed to investigate the infection status with helminth in a group of feral cats in korea. more than 29 helminth species including adults or eggs were detected in visceral and fecal samples of the examined cats. among these were a host of nematodes, including toxocarids, ancylostoma sp. and the larva of anisakis simplex; trematodes, including clonorchis sinensis, paragonimus westermani, eurytrema pancreaticum, pharyngostomum cordatum, metagonimus spp., heterophyes nocen ... | 2005 | 16192750 |
| storage and incubation of echinostoma revolutum eggs recovered from wild branta canadensis, and their infectivity to lymnaea tomentosa snails. | echinostoma revolutum eggs recovered from naturally infected wild canada geese (branta canadensis) were cold stored (4-6 degrees c) for up to 72 weeks. successful hatching followed incubation for from 6 to 8 days at an optimum temperature of between 25 and 30 degrees c. a partial life cycle from adult worm to metacercarial encystment in lymnaea tomentosa snails was completed in the laboratory. snails were infected both by free miracidia and by ingestment of unhatched embryonated eggs. infection ... | 2005 | 16336715 |
| 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 |
| a survey of waterfowl for echinostomes and schistosomes from lake wanaka and the waitaki river watershed, new zealand. | waterfowl from lake wanaka and the waitaki lakes watershed of new zealand's south island were surveyed to find natural hosts with adult echinostomes and schistosomes to provide sufficient numbers of eggs for laboratory studies. the canada goose (branta canadensis) was found to host an echinostome determined to be a new zealand strain of echinostoma revolutum. the new zealand scaup (aythya novaeseelandia) concurrently hosts three species of echinostomes (e. revolutum, echinoparyphium cinctum and ... | 2006 | 16469170 |
| cross-sectional survey on helminth infections of chickens in the samsun region, turkey. | a cross-sectional survey was performed to determine the prevalence and intensity of helminth infections in 185 chickens from nine districts in the samsun region, northern turkey between july 1999 and june 2000. in total, 88% of 83 scavenging chickens and 4% of 52 layers from laying batteries were infected, but none of the 50 broilers harboured helminths in the alimentary tract or trachea. the difference in prevalence was statistically significant among broilers, layers from laying batteries and ... | 2008 | 18605376 |
| 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 ... | 2009 | 19026653 |
| effects of diet and echinostoma revolutum infection on energy allocation patterns in juvenile lymnaea elodes snails. | resource allocation strategies may be influenced by both biotic and abiotic factors. the purpose of this study was to investigate the effects of both parasitism and diet quality on the growth, reproduction, and survival of the pond snail, lymnaea elodes. in addition, we assessed parasite growth and reproduction. high-protein (high diet) or low-protein diets (low diet) were fed to juvenile l. elodes snails that were either exposed or sham-exposed to the castrating trematode, echinostoma revolutum ... | 2003 | 12647119 |
| 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 |
| 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 |
| 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 ... | 2010 | 20064622 |
| 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 ... | 2010 | 21120529 |
| 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 ... | 2010 | 21129506 |
| 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 ... | 2017 | 28053568 |
| 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. | 2015 | 27065637 |
| 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 ... | 2013 | 22677200 |
| 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. ... | 2015 | 26692260 |
| 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 ... | 2012 | 22941527 |
| 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). ... | 2013 | 23467726 |
| 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 ... | 2012 | 22949759 |
| 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) ( ... | 2015 | 25557744 |
| 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 ... | 2013 | 23710085 |
| 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 ... | 1998 | 28308452 |