| [isolation of the cercaria diplostomum phoxini (faust, 1918) arvy et buttner, 1954 (diplostomatidae) from fresh water mollusks of the crimea]. | data on the biology and morphology of cercariae of diplostomum phoxini (faust, 1918) arvy et buttner, 1954 are given. the cercariae were found in radix auricularia from the middle part of the burulcha river (ukranian ssr, crimea). in november, 1974 the invasion extensity of mollusks was 16.3%. no cercariae were found in spring and summer samples. | 1976 | 66655 |
| malacological survey in the bhumibol reservoir, the first dam constructed in thailand. | twenty-five species of molluscs were found in a malacological survey in the bhumibol reservoir and in the ping river in front of the bhumibol dam and its tributaries in april and august 1985. among these species, tricula aperta or neotricula aperta, intermediate host of human schistosomes and bithynia (digoniostoma) siamensis goniomphalos and b. (d.) funiculata, the first intermediate host of human liver flukes, were not found. although some of the intermediate hosts of mammalian schistosomes, i ... | 1992 | 1523461 |
| [studies on echinostoma spp. in the chungju reservoir and upper streams of the namhan river]. | the present study was performed to know the epidemiological status of echinostomiasis in the chungju reservoir and upper streams of namhan river, together with an experimental study on the life history of echinostoma hortense. the stool specimens of 169 inhabitants and 473 junior high school students from 5 different villages revealed 3 (0.5%) echinostomatid egg positive cases. e. hortense adult worms were recovered from one patient after a treatment and purgation. for the other two patients, it ... | 1990 | 2099176 |
| prevalence of larval helminths in freshwater snails of the kinmen islands. | a survey of larval helminths in freshwater snails of kinmen was conducted from 1986 to 1987. parasitological examinations of a total of 726 live snails collected from 25 loci revealed that 20 of 80 bithynia fuchsiana were infected with metacercariae of echinostoma gotoi and 36 with metacercariae of other echinostomes. among 57 radix auricularia swinhoei snails, 27 were infected with echinostomes and eight with metacercariae of other flukes. of 20 cipangopaludina chinensis, 18 were found with lar ... | 1993 | 8132969 |
| [trichobilharzia franki n. sp.--the cause of swimmer's dermatitis in southwest german dredged lakes]. | ocellate furcocercariae from the lymnaeid snail radix auricularia have been identified as causative agents of swimmer's itch, which has become increasingly common in the 'tunisee' near freiburg. on an average 11.0%, maximally 25.0%, of the snails were parasitized with these trematode larvae. the trichobilharzia parasitizing rate in the intermediate hosts found here was thus approximately 10-100 times higher than the trichobilharzia prevalence described so far. dwarf mallards (anas platyrhynchos, ... | 1994 | 8173581 |
| radix auricularia coreana: natural snail host of clinostomum complanatum in korea. | an epidemiological survey was carried out to determine the first intermediate host of clinostomum complanatum among freshwater snails in korea. two species of snails belonging to the family lymnaeidae were collected in kaum-ji (pond), uisong-gun, kyongsangbuk-do. twelve (0.9%) out of 1,273 radix auricularia coreana examined were found to liberate cercariae of c. complanatum, which were identified by morphological characteristics and experimental infections in freshwater fish. pseudorasbora parva ... | 1998 | 9529857 |
| life history of echinoparyphium recurvatum (trematoda: echinostomatidae) in korea. | the present study was performed to observe characteristics of the life history of echinoparyphium recurvatum under both natural and laboratory conditions in korea. a batch of radix auricularia coreana was collected from sunamchon, one of the stream of west naktonggang (river), in kangso-gu, pusan during august and september 1992. out of 106 snails examined by crushing, 52 (49.0%) were infected with larval e. recurvatum, i.e. rediae, cercariae and metacercariae. cercariae naturally shed from snai ... | 1998 | 9637826 |
| natural infection of trematodes in lymnaea (radix) auricularia rubiginosa in water reservoirs in amphoe muang, khon kaen province. | lymnaea (radix) auricularia rubiginosa (michelin, 1831) was surveyed in 54 reservoirs of 18 districts in amphoe muang, khon kaen province during february to may 1994. lymnaeid snails were found in the water of 20 reservoirs, of which 16 reservoirs contained clear water and 4 turbid water. two of the four turbid water reservoirs received drainage water from khon kaen town. two thousand four hundred and eight l. auricularia rubiginosa were collected and examined by shedding and crushing. trematode ... | 1997 | 9656379 |
| austropeplea ollula (pulmonata: lymnaeidae): a new molluscan intermediate host of a human intestinal fluke, echinostoma cinetorchis (trematoda: echinostomatidae) in korea. | three freshwater snail species of the family lymnaeidae have been reported from korea, radix auricularia coreana, austropeplea ollula and fossaria truncatula. out of 3 lymnaeid snail species, a. ollula was naturally infected with the echinostoma cinetorchis cercariae (infection rate = 0.7%). in the experiments with the laboratory-bred snails, f. truncatula as well as a. ollula was also susceptible to the e. cinetorchis miracidia with infection rates of 25% and 40%, respectively. all of three lym ... | 2001 | 11590915 |
| tegumental ultrastructures of echinoparyphium recurvatum according to developmental stages. | the present study was performed to observe tegumental ultrastructure of echinoparyphium recurvatum according to developmental stages. worms (1, 3, 5 and 15-day old) were recovered from chicks experimentally infected with metacercariae from radix auricularia coreana. one-day old worms were elongated and ventrally concave, and covered with peg-like tegumental spines except the adjacent areas of the head crown and excretory pore. type i sensory papillae were distributed on the lip of the oral sucke ... | 2002 | 12073731 |
| [an epidemiological survey of schistosome cercarial dermatitis among the residents living along the banks of the huaihe river system]. | to make an epidemiological survey of schistosome cercarial dermatitis among the residents living along the banks of the huaihe river. | 1998 | 12078280 |
| host specificity of austropeplea ollula (gastropoda: lymnaeidae) to miracidial infection with a human intestinal fluke neodiplostomum seoulense (trematoda: diplostomatidae) in korea. | three species of freshwater pulmonate snails of lymnaeidae have been reported from korea, radix auricularia coreana, austropeplea ollula, and fossaria truncatula. of these 3 species, only a. ollula was naturally infected with neodiplostomum seoulense cercariae (prevalence, 0.3%). in experiments with the laboratory-reared snails, a. ollula was found to be susceptible to the n. seoulense miracidia (prevalence, 10%). this is the first report of a. ollula as the first molluscan intermediate host for ... | 2002 | 12099442 |
| [visceral lesions in mammals and birds exposed to agents of human cercarial dermatitis]. | over the past few years, the cercarial dermatitis has become a new problem of public health, obviously linked to the prolonged stay of migrant birds on our territory. this is a skin affection characterized by pruriginous and papulous eruptions caused by penetration of avian bilharzian larvae under the skin. these larvae are emitted by molluscs, mostly limneids. in aquatic birds, especially in migrating anatidae, these larvae reach the visceral vessels, become adults in a few weeks, lay eggs, the ... | 2002 | 12596366 |
| identification of trematode cercariae carrying neorickettsia risticii in freshwater stream snails. | we provide evidence of neorickettsia (ehrlichia) risticii holland, the agent of potomac horse fever, in trematode larval stages found in aquatic snails and insects collected from a stream in korea, using nested polymerase chain reaction (pcr) and sequence analysis of the 16s rrna gene fragment amplified from several cercaria species. it was observed that of 423 (13.1%) of 3,219 snails infected with cercariae, 77 (20.8% of the 371) were infected with n. risticii. five families of trematode cercar ... | 2003 | 12860634 |
| prevalence and sequence analyses of neorickettsia risticii. | the presence of neorickettsia (ehrlichia) risticii dna was confirmed by pcr amplification and sequence analysis from cercaria in snails collected from stream water in chungcheong and jeonra provinces. a total of 3,219 snails were tested for trematode cercariae and n. risticii infection. n. risticii 16s rrna gene fragment was amplified in cercariae from semisulcospira libertina and radix auricularia coreana snails by nested pcr. more than four genus cercariae (schistosomatidae, microphallidae, fu ... | 2003 | 12860635 |
| [experimental and epidemiological studies on the life cycle of echinostoma hortense asada, 1926 (trematoda: echinostomatidae)] | recently there have been some reports on human infections of echinostoma hortense in korea. it was found that a few species of freshwater fishes were playing the role of the second intermediate host of e. hortense. however, molluscan intermediate host has not been identified yet in korea. the present study aimed to establish the life cycle of e. hortense in laboratory. experimental studies such as egg production from the rat, development of the eggs in vitro, exposure of miracidia to freshwater ... | 1986 | 12886089 |
| [distribution of medically important freshwater snails and larval trematodes from parafossarulus manchouricus and semisulcospira libertina around the jinyang lake in kyongsang-nam-do, korea] | the jinyang lake is dammed up nam river, and surrounded by jinju city and four counties; jinyang, sanchong, hadong, and sachon in kyongsang-nam-do, korea. the area around this man-made lake have been known as an endemic focus of clonorchiasis in korea. the present study was first aimed to know the distribution of freshwater mollusks including medically important snails, and larval trematodes shed from parafossarulus manchouricus and semisulcospira libertina. in addtion to above studies, water an ... | 1983 | 12902649 |
| infection of snails with bird schistosomes and the threat of swimmer's itch in selected polish lakes. | studies of selected species of lymnaeidae and planorbidae showed that infection with bird schistosomes occurred in 14 of the 26 polish lakes studied. in planorbarius corneus larvae of bilharziella polonica were found, and in lymnaea stagnalis and radix auricularia larvae of trichobilharzia ocellata. in spite of their comparatively low prevalence, cercariae, potentially pathogenic to humans, may have caused dermatitis in patients registered in one of the regions under study. the low prevalence of ... | 2004 | 14598171 |
| presence of trichobilharzia szidati in lymnaea stagnalis and t. franki in radix auricularia in northeastern france: molecular evidence. | a molecular approach was used to analyse a focus of cercarial dermatitis in northeastern france (lake der-chantecoq), including both cercariae and snails,by sequencing the internal transcribed spacers (its1 for ocellate furcocercariae and its2 for snails). lymnaea stagnalis were found infected with the furcocercariae of trichobilharzia szidati, and t. franki furcocercariae were found in radix auricularia. the record of these two visceral parasites of birds in northern france confirms strong host ... | 2004 | 15609060 |
| [survey on natural nidus of trichobilharzia in huainan area]. | the life cycle of trichobilharzia sp. can be completed in radix auricularia and domestic or wild ducks, and people can contract cercarial dermatitis through water contact. natural nidus of trichobilharzia exists in huainan area. | 2007 | 17639704 |
| schistosomes in the north: a unique finding from a prosobranch snail using molecular tools. | samples of schistosome cercariae from three different snail species (lymnaea stagnalis, radix auricularia and valvata (tropidina) macrostoma) collected from lakes in central finland were analyzed using molecular techniques. based on sequences of its region of rdna, the parasite isolates from l. stagnalis and r. auricularia belong to trichobilharzia szidati and t. franki, respectively. this confirms a wide distribution of these two species in europe. on the other hand, the isolates from v. macros ... | 2009 | 19345742 |
| evidence of fasciola hepatica infection in radix peregra and a mollusc of the family succineidae in ireland. | worldwide molluscs of the genera lymnaea, pseudosuccinea, galba and stagnicola act as intermediate hosts of the common liver fluke, fasciola hepatica. galba truncatula is the only recorded intermediate host of f. hepatica within ireland and is the principle intermediate host within europe. to investigate the transmission of liver fluke on the teagasc hill sheep farm, co. mayo, ireland, snail species other than g. truncatula, were collected from the lowland pasture (snail sp. 'a') in may (n=23) a ... | 2009 | 19446399 |
| a natural focus of the blood fluke orientobilharzia turkestanica (skrjabin, 1913) (trematoda: schistosomatidae) in red deer (cervus elaphus) in hungary. | the large american liver fluke, fascioloides magna - introduced to europe before 1875 - was the first non-indigenous trematode to be detected in hungarian cervids in 1995. as the most precious deer population became infected in the gemenc game reserve a study has been launched to assess the extent and the effect of f. magna infections and to examine the options for the treatment of infected deer populations. livers of red deer shot during regular hunting were submitted for the survey and were in ... | 2010 | 20347227 |
| larval trematode communities in radix auricularia and lymnaea stagnalis in a reservoir system of the ruhr river. | abstract: | 2010 | 20576146 |
| detection of european trichobilharzia schistosomes ( t. franki , t. szidati , and t. regenti ) based on novel genome sequences. | the most frequent causative agents of cercarial dermatitis in europe are the avian schistosomes of the genus trichobilharzia . they preferably parasitize birds of the anatidae. trichobilharzia spp. schistosomes are also able to penetrate mammalian skin, posing a health risk to mammals, including humans. currently several loci from nuclear and mitochondrial genomes are determined for european species of trichobilharzia . among them there is 1 genome sequence, tosau3a, which is suitable for detect ... | 2010 | 20677938 |
| molecular diversity of trichobilharzia franki in two intermediate hosts (radix auricularia and radix peregra): a complex of species. | recently, the systematic use of the molecular approach as a complement to the other approaches (morphology, biology, life cycle) has brought help for the identification of species considered as different in the past to be regrouped and synonymised, and distinctions to be drawn between species similar at the morphological level. among these species, we tried to clarify the situation of trichobilharzia frankimüller and kimmig, 1994, species that today include more than 50 haplotypes notably coming ... | 2010 | 20708105 |
| parasitological and molecular study of the furcocercariae from melanoides tuberculata as a probable agent of cercarial dermatitis. | cercarial dermatitis is caused by animal schistosomes in many parts of the world including iran. various stages of the parasites have been studied in intermediate and definitive hosts in northern and southwestern iran; however, no molecular investigation for species identification and classification of these agents has been carried out, so far. in the present study, more than 3,800 aquatic snails were collected from water sources of khuzestan, southwest iran. the snails were identified as lymnae ... | 2010 | 21046153 |
| geographical distribution of cercarial dermatitis in norway. | bird schistosomes can cause a disease called cercarial dermatitis, or swimmer's itch, in humans. the disease occurs when people have direct contact with fresh water or sea water containing the free-swimming cercariae of the flukes. the symptoms are well known, and include intense itching, maculae, papulae, urticariae and, in some cases, local oedema with enlarged lymph nodes and fever. in this study, we present the geographical distribution of freshwater cercarial dermatitis in norway. the study ... | 2010 | 21070686 |
| molecular evidence of trichobilharzia franki müller and kimmig, 1994 (digenea: schistosomatidae) in radix auricularia from central italy. | the molecular approach was used to identify the first focus of human cercarial dermatitis occurring during the spring-summer season in vico lake, a natural reserve area in central italy. sequences of 586 bp length of the partial region of 18s and its-1 ribosomal dna from cercariae were obtained. they were compared with extant genbank sequences of trichobilharzia. accordingly, the ocellate furcocercariae were identified as belonging to the species trichobilharzia franki müller and kimmig, 1994. s ... | 2011 | 21360093 |
| integrative taxonomic approach to the cryptic diversity of diplostomum spp. in lymnaeid snails from europe with a focus on the 'diplostomum mergi' species complex. | recent molecular studies have discovered substantial unrecognised diversity within the genus diplostomum in fish populations in europe and north america including three species complexes. however, data from the first intermediate host populations are virtually lacking. this study addresses the application of an integrative taxonomic approach to the cryptic species diversity of diplostomum spp. in natural lymnaeid snail populations in europe with a focus on the 'd. mergi' species complex. | 2015 | 26036245 |
| current status of fasciolosis in vietnam: an update and perspectives. | vietnam is recognized to be endemic for fasciolosis. however, most of the available publications have not been published in international journals. this review is based on national and international vietnamese publications and highlights the current status of fasciolosis in vietnam. it also provides some information available for neighbouring countries. updated data on responsible species, distribution, transmission and control aspects are summarized. the central region of vietnam is reported as ... | 2016 | 26564097 |
| fasciola gigantica transmission in the zoonotic fascioliasis endemic lowlands of guilan, iran: experimental assessment. | the lowland flatlands around the city of bandar-anzali, at the caspian sea shore, guilan province, are an endemic area where fasciola gigantica appears to be the fasciolid species involved and past outbreaks affecting around 15,000 people and the highest human infection rates in iran have been reported. fascioliasis transmission in that area has been experimentally analysed for the first time, by means of assays of monomiracidial (group a: 120 snails) and pentamiracidial (group b: 96 snails) inf ... | 2014 | 25095734 |
| morphological and molecular characterization of lymnaeid snails and their potential role in transmission of fasciola spp. in vietnam. | freshwater snails of the family lymnaeidae play an important role in the transmission of fascioliasis worldwide. in vietnam, 2 common lymnaeid species, lymnaea swinhoei and lymnaea viridis, can be recognized on the basis of morphology, and a third species, lymnaea sp., is known to exist. recent studies have raised controversy about their role in transmission of fasciola spp. because of confusion in identification of the snail hosts. the aim of this study is, therefore, to clarify the identities ... | 2013 | 24516270 |
| swimmer's itch in belgium: first recorded outbreaks, molecular identification of the parasite species and intermediate hosts. | cercarial dermatitis or swimmer's itch is a skin condition in humans due to the larval forms of bird schistosomes of some species of the genus trichobilharzia. the life cycle of these schistosomes requires freshwater snails (intermediate host) and waterfowl (definitive host). repeated exposures to cercariae can lead to skin sensitization with the induction of pruritic skin lesions. | 2017 | 28112601 |
| molecular diversity of avian schistosomes in danish freshwater snails. | avian schistosomes are widespread parasites of snails and waterfowl and may cause cercarial dermatitis (swimmer's itch) in humans, a disease that is frequently reported in european countries. these parasites are known to occur in denmark, but here, we applied a new approach using molecular tools to identify the parasites at species level. in order to do that, 499 pulmonate freshwater snails (radix sp., lymnaea stagnalis, stagnicola sp. and planorbarius corneus) were sampled from 12 lakes, ponds, ... | 2016 | 26573519 |
| identification of a major causative agent of human cercarial dermatitis, trichobilharzia franki (müller and kimmig 1994), in southern england and its evolutionary relationships with other european populations. | trichobilharzia is the most species rich and widely distributed genus of schistosomes and is known throughout europe and north america as an agent of human cercarial dermatitis. the disease is caused by an acute allergic reaction in the skin that develops as a consequence of repeated contact with water containing schistosomatid cercariae. however, despite historical outbreaks of the disease, there are no published records of accurately identified trichobilharzia species from the uk. | 2014 | 24946974 |
| new cryptic species of the 'revolutum' group of echinostoma (digenea: echinostomatidae) revealed by molecular and morphological data. | the digenean species of echinostoma (echinostomatidae) with 37 collar spines that comprise the so-called 'revolutum' species complex, qualify as cryptic due to the interspecific homogeneity of characters used to differentiate species. only five species were considered valid in the most recent revision of the group but recent molecular studies have demonstrated a higher diversity within the group. in a study of the digeneans parasitising molluscs in central and northern europe we found that radix ... | 2013 | 23497579 |