Bird schistosomes have been in focus as causative agents of cercarial dermatitis of humans in the last years; however, our knowledge of their species spectrum and intermediate host specificity is still insufficient. Our study focused on bird schistosomes developing in planorbid snails that have been less studied so far. From 2001 to 2010, cercariae of bird schistosomes were found in four snail species (Gyraulus albus, Segmentina nitida, Anisus vortex and Planorbis planorbis) from seven localities in the Czech Republic. Based on morphology and results of molecular analysis, the isolates found belong to at least six species. Five of them are probably undescribed species, and one species appears to be identical with Gigantobilharzia vittensis Reimer, 1963 (syn. G. suebica Dönges, 1964). The finding from S. nitida represents the first report of a bird schistosome from this snail.

• MeSH
• cerkárie MeSH
• dermatitida parazitologie   MeSH
• DNA helmintů chemie   genetika   MeSH
• fylogeneze MeSH
• hlemýždi parazitologie   MeSH
• hostitelská specificita MeSH
• infestace ektoparazity parazitologie   přenos   veterinární   MeSH
• kachny MeSH
• kur domácí MeSH
• lidé MeSH
• molekulární sekvence - údaje MeSH
• myši inbrední BALB C MeSH
• myši MeSH
• nemoci ptáků parazitologie   přenos   MeSH
• pěnkavovití MeSH
• ribozomální DNA chemie   genetika   MeSH
• Schistosoma anatomie a histologie   klasifikace   genetika   izolace a purifikace   MeSH
• schistosomóza parazitologie   přenos   veterinární   MeSH
• sekvence nukleotidů MeSH
• sekvenční analýza DNA MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• myši MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Česká republika MeSH

• MeSH
• centrální nervový systém * parazitologie   MeSH
• cerkárie MeSH
• interakce hostitele a parazita MeSH
• játra * parazitologie   MeSH
• lidé MeSH
• nemoci ptáků MeSH
• parazitologie MeSH
• ptáci MeSH
• Schistosoma * fyziologie   klasifikace   patogenita   MeSH
• skot MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• skot MeSH
• zvířata MeSH

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, five species/genotypes of bird schistosomes were identified. Three of them correspond to the sequences in GenBank for Trichobilharzia franki, Trichobilharzia sp. JR-2007 from Anas penelope (isolates Pl7 and Pl10) and schistosomatid sp. JR-2004 from Physa fontinalis. The other two species/genotypes belong to the genus Trichobilharzia, but their further determination was not possible due to lack of data. All of these species/genotypes develop in R. peregra, probably the only suitable intermediate host species in Iceland. As T. franki and schistosomatid sp. JR-2004 were previously reported from other snail species, the findings from Iceland proved that, under some circumstances, bird schistosomes are able to adapt to a different snail species; some of them can even adapt to a snail belonging to a different gastropod family. High diversity of bird schistosomes in Iceland is probably linked with migratory flyways of birds, as several bird species from Iceland overwinter in western Europe as well as in North America.

• MeSH
• DNA helmintů genetika   MeSH
• hlemýždi parazitologie   MeSH
• mezerníky ribozomální DNA genetika   MeSH
• nemoci ptáků epidemiologie   parazitologie   MeSH
• ptáci parazitologie   MeSH
• Schistosoma klasifikace   genetika   izolace a purifikace   MeSH
• schistosomóza epidemiologie   parazitologie   veterinární   MeSH
• sekvenční analýza DNA MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Island MeSH

In Iceland, the examination of whooper swans (Cygnus cygnus L.) viscera resulted in the detection of adult digenean flukes of the family Schistosomatidae. The mature worms occurring in the blood vessels of the large intestine and mesenterium caused vascular lesions, around the eggs deposited in the intestinal mucosa and liver granulomatous reactions developed. The morphology of the isolated schistosomes shows certain similarity with the flukes of the genus Trichobilharzia; in males reduced gynecophoral canal, and on both sexes both suckers and spatulate ends are present. However, the Icelandic flukes possess other morphological features which are distinct from the genus: the point of caecal reunion in males takes place posterior to gynecophoral canal and the genital pore is behind acetabulum and anterior to caecal reunion. In order to evaluate the identity of Icelandic schistosomes, sequencing of ITS region of DNA was performed, and the obtained sequence was deposited in GenBank under the accession no. DQ067561. Following phylogenetic analysis of relationship between the sequence of Icelandic flukes and database sequences of other bird schistosome genera (Trichobilharzia, Gigantobilharzia and Dendritobilharzia) showed different position of Icelandic worms in the phylogenetic tree. In conclusion, our study revealed new genus and species of schistosome flukes--Allobilharzia visceralis gen. et sp. n.

• MeSH
• Anseriformes anatomie a histologie   parazitologie   MeSH
• feces parazitologie   MeSH
• financování organizované MeSH
• fylogeneze MeSH
• molekulární sekvence - údaje MeSH
• nemoci ptáků parazitologie   MeSH
• počet parazitárních vajíček MeSH
• polymerázová řetězová reakce MeSH
• ribozomální DNA genetika   MeSH
• Schistosoma anatomie a histologie   genetika   klasifikace   MeSH
• schistosomóza parazitologie   veterinární   MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• zvířata MeSH

• MeSH
• dermatitida parazitologie   MeSH
• karyotypizace MeSH
• lidé MeSH
• plavání MeSH
• pruritus parazitologie   MeSH
• Schistosoma genetika   klasifikace   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• srovnávací studie MeSH

• MeSH
• kontrola infekčních nemocí MeSH
• Schistosoma imunologie   klasifikace   patogenita   růst a vývoj   MeSH
• schistosomóza diagnóza   epidemiologie   farmakoterapie   MeSH

• Konspekt
• Patologie. Klinická medicína
• NLK Obory
• infekční lékařství
• parazitologie
• NLK Publikační typ
• publikace WHO

• MeSH
• epidemiologické studie MeSH
• hlemýždi parazitologie   MeSH
• kontrola infekce MeSH
• Schistosoma fyziologie   genetika   klasifikace   patogenita   růst a vývoj   MeSH
• schistosomóza epidemiologie   prevence a kontrola   MeSH

• Konspekt
• Patologie. Klinická medicína
• NLK Obory
• epidemiologie
• infekční lékařství
• parazitologie
• NLK Publikační typ
• publikace WHO