Myxozoan infections of caecilians demonstrate broad host specificity and indicate a link with human activity
Jazyk angličtina Země Velká Británie, Anglie Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
26945641
DOI
10.1016/j.ijpara.2016.02.001
PII: S0020-7519(16)00041-2
Knihovny.cz E-zdroje
- Klíčová slova
- Amphibian, Captivity, Cystodiscus, Frogs, Gymnophiona, Myxosporea,
- MeSH
- DNA izolace a purifikace MeSH
- fylogeneze MeSH
- hostitelská specificita * MeSH
- játra parazitologie MeSH
- ledviny parazitologie MeSH
- lidé MeSH
- lidské činnosti MeSH
- mikroskopie elektronová rastrovací MeSH
- mozek parazitologie MeSH
- Myxozoa klasifikace genetika fyziologie ultrastruktura MeSH
- obojživelníci parazitologie MeSH
- parazitární nemoci u zvířat epidemiologie parazitologie MeSH
- prevalence MeSH
- žlučník parazitologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- DNA MeSH
Myxozoans are parasitic cnidarians that infect a wide variety of hosts. Vertebrates typically serve as intermediate hosts whereas definitive hosts are invertebrates, including annelids and bryozoans. Myxozoans are known to exploit species in two of the three extant amphibian orders (Anura: frogs and toads; Caudata: newts and salamanders). Here we use museum collections to determine, to our knowledge for the first time, whether myxozoans also exploit the third amphibian order (Gymnophiona: caecilians). Caecilians are a poorly known group of limbless amphibians, the ecologies of which range from aquatic to fully terrestrial. We examined 12 caecilian species in seven families (148 individuals total) characterised by a diversity of ecologies and life histories. Using morphological and molecular surveys, we discovered the presence of the myxozoan Cystodiscus axonis in two South American species (one of seven examined families) of aquatic caecilians - Typhlonectes natans and Typhlonectes compressicauda. All infected caecilians had been maintained in captivity in the United Kingdom prior to their preservation. Cystodiscus axonis is known from several Australian frog species and its presence in caecilians indicates a capacity for infecting highly divergent amphibian hosts. This first known report of myxozoan infections in caecilians provides evidence of a broad geographic and host range. However, the source of these infections remains unknown and could be related to exposure in South America, the U.K. or to conditions in captivity.
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