| [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 |
| the karyotype of trichobilharzia franki müller et kimmig, 1994 (digenea:schistosomatidae), a new european schistosome agent of swimmers' itch. | chromosome characteristics of trichobilharzia franki müller et kimming, 1994, causing swimmer's itch in the western germany, were described and compared with the karyotype of the sympatric species trichobilharzia szidali neuhaus, 1952. karyotypes of both species are very similar: diploid sets consist of seven pairs of autosome chromosomes and one pair of sex chromosomes (2n = 16, n = 5m + 2sm + zsm/wst), the sex determining mechanism is zz in males and zw in females and gross morphology of autos ... | 1997 | 9208032 |
| detection of bird schistosomes in lakes by pcr and filter-hybridization. | many lakes around the world are contaminated with bird schistosome cercariae, which penetrate into human skin, causing an itching dermatitis called "swimmers' itch." bathers could be forewarned from exposure to the larvae and ecological examinations could be performed, when a sensitive method to detect the parasites in aquatic systems, where lots of organisms hinder microscopic examinations, would be available. for this purpose we cloned, sequenced, and analyzed a 396 bp tandem repeated dna sequ ... | 2002 | 12243738 |
| [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 |
| trichobilharzia spp. in natural conditions in annecy lake, france. | annecy lake is a well-known focus of human cercarial dermatitis in france. identification of the parasites, however, was not performed in the past. previous studies suspected two species, trichobilharzia franki and trichobilharzia regenti, based on the presence of parasites in mallards and/or morphological identification of snails emitting ocellate furcocercariae. following a standardized molecular approach, we studied snails and furcocercariae and compared their haplotypes with those deposited ... | 2008 | 18320223 |
| bird schistosome diversity in iceland: molecular evidence. | during the years 2002-2007, icelandic freshwater snails and birds from different orders were examined for bird schistosomes. only the snail radix peregra and anatid birds proved to be infected. in total, 32 samples of bird schistosome cercariae from seven localities and four samples of adults of anas platyrhynchos and mergus serrator from two localities were used for sequencing of the internal transcibed spacer (its) region of rdna. based on the sequence and position in the phylogenetic tree, fi ... | 2009 | 19296877 |
| avian schistosomes in french aquatic birds: a molecular approach. | the prevalence of human cercarial dermatitis (hcd) caused by bird schistosomes appears to be increasing in france, in light of the impact of tourism combined with high densities of wild aquatic hosts in freshwater areas. the present work expands our knowledge of schistosome systematics by including samples of bird schistosomes collected from their natural hosts in france. heads (318) and viscera (81) of aquatic birds belonging to 16 species from five orders, collecting during the hunting seasons ... | 2009 | 19356266 |
| molecular systematics of the avian schistosome genus trichobilharzia (trematoda: schistosomatidae) in north america. | trichobilharzia is a genus of threadlike schistosomes with a cosmopolitan distribution in birds. species of trichobilharzia achieve notoriety as major etiological agents of cercarial dermatitis, or swimmer's itch. there are 40 species described in the literature, for which the majority lacks molecular sequence information. to better understand the phylogenetic relationships, diversity, species boundaries, host use, and geographic distribution of this genus better, we surveyed 378 birds and over ... | 2009 | 20049999 |
| 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 |
| 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 |
| the neuro-muscular system in fresh-water furcocercaria from belarus. i schistosomatidae. | the neuro-muscular system (nms) in cercariae of the family schistosomatidae from belarus was studied with immunocytochemical methods and confocal scanning laser microscopy. the specimens of bilharziella polonica were compared with trichobilharzia szidati and trichobilharzia franki. the patterns of f-actin in the musculature, 5-ht-immunoreactive (ir), fmrfamide-ir neuronal elements and α-tubulin-ir in sensory receptors and nerves were investigated. no indications of structural differences in the ... | 2011 | 21614541 |
| the neuromuscular system in freshwater furcocercaria from belarus. ii diplostomidae, strigeidae, and cyathocotylidae. | the neuromuscular system (nms) in cercariae of diplostomum pseudospathaceum, cotylurus szidati, australapatemon burti, holostephanus volgensis, and paracoenogonimus ovatus was studied with immunocytochemical methods and confocal scanning laser microscopy. the patterns of f-actin in the musculature, 5-ht immunoreactive (-ir), fmrf-amide-ir neuronal elements, and a-tubulin-ir in sensory receptors were investigated. the nms in the five species studied were compared with each other and with three sp ... | 2011 | 21748349 |
| 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 |