Skrjabingylus nasicola
| Skrjabingylus nasicola | |
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S. nasicola
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| Skrjabingylus nasicola (Leuckart, 1842)
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Skrjabingylus nasicola is a species of parasitic nematode in the family Metastrongylidae. The life cycle includes an intermediary mollusc host and a paratenic host, a shrew or small rodent. Adult worms are found in the nasal sinuses of mustelids.
Infection
Hansson (1977) showed that direct transmission of the nematode from mustelid to mustelid did not occur. Nor did infection occur when the mustelid was fed on small rodents, amphibia, molluscs, arthropods or earthworms. Infection could occur when the animal was fed on the common shrew (Sorex aranea) and larvae of the nematode begin to be excreted by the mustelid some three weeks later.[1] Research since then has shown that rodents can be a source of infection for mustelids.[2]
Life cycle
Skrjabingylus nasicola has a complex life cycle. Larvae passed in the faeces of infected mustelids are ingested by slugs such as Deroceras reticulatum. Mustelids do not usually eat molluscs, but the slugs may be eaten by a mammalian paratenic host such as Apodemus sp. or Clethrionomys glareolus. No developmental stages take place in this host and the nematode rests in the glandular zones in the head or possibly in the muscle or connective tissue. Further development takes place when this host is eaten by a mustelid and the parasite moves into its nasal tissues.[2]
