Schistosomes in the North: A unique finding from a prosobranch snail using molecular tools

Aldhoun, Jitka A.; Faltýnková, Anna; Karvonen, Anssi; Horák, Petr

doi:10.1016/j.parint.2009.03.007

Cited by 22 publications

(19 citation statements)

References 17 publications

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“…At the base of clade D is an unresolved group of avian schistosomes, most of which have been implicated in dermatitis outbreaks and comprise the most diverse range of both bird and snail (9 families) host use (13,40,(56)(57)(58)(59)(60)(61)(62)(63)(64)(65)(66). Current results based on all of the available sequence data in GenBank for the internal transcribed spacer (ITS) region indicate that there are about nine distinct lineages, only two of which are described: Gigantobilharzia and Dendritobilharzia (40,(64)(65)(66)(67)(68)(69).…”

Section: Diversity Of Schistosomes Causing Dermatitismentioning

confidence: 99%

“…For example, in the San Francisco Bay area (California), one beach in particular has annual cases of dermatitis (64). The prevalence of dermatitis caused by schistosomes from Valvata or Melanoides snails (63,65,66) depends on how often people use areas where these snails release cercariae.…”

Section: Diversity Of Schistosomes Causing Dermatitismentioning

confidence: 99%

“…Experimental infections with cercariae from snails to obtain adult worms for morphological assessment are ideal, but these are time-consuming and often yield low prevalences of infection. Because of the reported species, morphological, and pathogenic diversity of avian schistosomes (12,13), from an epidemiological perspective on dermatitis, there is a need for species delineation and host use, and molecular techniques have proven a necessary and excellent tool for more rapid identifications (63,70,135). Such techniques have allowed us to genetically connect larval stages from snails to adult stages from birds, greatly advancing the epizootology and epidemiology of avian schistosomes in particular (10,40,123).…”

Section: Detection and Identification Of Avian Schistosomesmentioning

confidence: 99%

“…Most of the effort has been conducted using three gene regions. To date, the nuclear ribosomal DNA D1-D2 regions of 28S, the internal transcribed spacer (ITS) region, and the mitochondrial cox1 gene have been tested as molecular markers for systematics (40,63,67,69,70,105,123,248,249,251), epidemiology (252), and diagnostics (121,253). Sequencing of gene regions such as the nuclear ITS region and the mitochondrial cox1 gene not only has linked life cycle stages but also has suggested that our recognition of the diversity of avian schistosomes continues to grow (10, 12, 40, 65-67, 69, 70, 105, 129, 133, 135).…”

Section: Detection and Identification Of Avian Schistosomesmentioning

confidence: 99%

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Avian Schistosomes and Outbreaks of Cercarial Dermatitis

et al. 2015

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SUMMARY Cercarial dermatitis (swimmer's itch) is a condition caused by infective larvae (cercariae) of a species-rich group of mammalian and avian schistosomes. Over the last decade, it has been reported in areas that previously had few or no cases of dermatitis and is thus considered an emerging disease. It is obvious that avian schistosomes are responsible for the majority of reported dermatitis outbreaks around the world, and thus they are the primary focus of this review. Although they infect humans, they do not mature and usually die in the skin. Experimental infections of avian schistosomes in mice show that in previously exposed hosts, there is a strong skin immune reaction that kills the schistosome. However, penetration of larvae into naive mice can result in temporary migration from the skin. This is of particular interest because the worms are able to migrate to different organs, for example, the lungs in the case of visceral schistosomes and the central nervous system in the case of nasal schistosomes. The risk of such migration and accompanying disorders needs to be clarified for humans and animals of interest (e.g., dogs). Herein we compiled the most comprehensive review of the diversity, immunology, and epidemiology of avian schistosomes causing cercarial dermatitis.

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Section: Diversity Of Schistosomes Causing Dermatitismentioning

confidence: 99%

Section: Diversity Of Schistosomes Causing Dermatitismentioning

confidence: 99%

Section: Detection and Identification Of Avian Schistosomesmentioning

confidence: 99%

Section: Detection and Identification Of Avian Schistosomesmentioning

confidence: 99%

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Avian Schistosomes and Outbreaks of Cercarial Dermatitis

et al. 2015

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“…The phylogenetic analyses rendered to identifi cation of parasites, evolution, diversifi cation and host-parasite relationships. Aldhoun et al (2009) described morphological and molecular characterization of cercariae from snails (Lymnaea stagnalis, Radix auricularia, Valvata macrostoma) from Finland using ITS rDNA sequences. Cercariae from L. stagnalis and R. auricularia belong to Trichobilharzia szidati and T. franki, respectively, affi rmed the diversity of two species in Europe and other isolates from V. macrostoma corresponded to unknown schistosome.…”

Section: Schistosomatidae (Stiles and Hassall 1898)mentioning

confidence: 99%

A review on the molecular characterization of digenean parasites using molecular markers with special reference to ITS region

et al. 2015

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SummaryThe rDNA region of eukaryotes has the immense potential to resolve the evolutionary and phylogeny problems using molecular markers. As evident from the present review, ITS region data is considered for interpretation of inter and intra-specifi c variations of 136 studies of 33 families including 78 genus and 114 species affecting individuals worldwide. Along with ITS-1 and ITS-2 region in 29 studies 18S region, in 38 studies 28S region and in 43 studies mitochondrial genes (COI and NDI) were also analyzed. Three new genera (Allobilharzia gen. nov., Caulanus gen. nov., and Latuterus gen. nov.) and 49 new species were discovered. Only 47 studies expressed variations at intra-specifi c and inter-specifi c level in complete ITS region, ITS-1 and ITS-2 rDNA sequences due to differences in nucleotide positions. According to the fi ndings ITS region is more reliable and precise marker for demarcation and identifi cation of species in combination of other DNA markers. Major studies were involved around the parasites of families Fasciolidae, Schistosomatidae, Opisthorchidae, Paragonimidae and Paramphistomidae, Clinostomidae, Diplostomidae, Haploporidae, among others infecting humans, farm animals, birds, fi shes, reptiles and amphibians on the clinical basis. In future, molecular and bioinformatics aspects based on genetic variations will lead to explore the untouched areas of trematodes.

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Parasitological and molecular study of the furcocercariae from Melanoides tuberculata as a probable agent of cercarial dermatitis

et al. 2010

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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 Lymnaea gedrosiana, Radix auricularia, Melanoides tuberculata, Melanopsis sp. and Physa acuta. They were examined for schistosome cercariae. Two specimens of M. tuberculata were infected with ocellate furcocercariae belonging to the family Schistosomatidae. Molecular studies were carried on these schistosomatid samples. Both samples belong to an unknown schistosome species and genus in sister position to Gigantobilharzia-Dendritobilharzia clade. They differ from other species in their ITS sequence region as well as in their intermediate host specificity--This is one of the first reports on schistosome cercariae from M. tuberculata and the first including molecular data. Due to adaptability and invasiveness of this snail species, this new schistosome species, as a potential causative agent of cercarial dermatitis in humans, needs to be studied further.

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Schistosomes in the North: A unique finding from a prosobranch snail using molecular tools

Cited by 22 publications

References 17 publications

Avian Schistosomes and Outbreaks of Cercarial Dermatitis

Avian Schistosomes and Outbreaks of Cercarial Dermatitis

A review on the molecular characterization of digenean parasites using molecular markers with special reference to ITS region

Parasitological and molecular study of the furcocercariae from Melanoides tuberculata as a probable agent of cercarial dermatitis

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