ArticleParasite (Paris, France)2023
Land snails can trap trematode cercariae in their shell: Encapsulation as a general response against parasites?
Article in Parasite (Paris, France), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
2 citing papers in PubMed.
- How does urbanization shape shell phenotype, behavior, and parasite prevalence in the snailCurrent zoology · 2026Article
- Occurrence of brachylaimid trematodes, alive and shell-trapped, in sympatric species of terrestrial gastropods in France.Parasite (Paris, France) · 2026Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
Terrestrial gastropods are hosts of a wide variety of metazoan parasites and can respond to parasite exposure in various ways. One of these defence mechanisms, the ability to trap parasites in the host shell, was previously thought to apply only against nematodes. During a field survey along an urbanisation gradient, we found that the shell of Cornu aspersum and Cepaea nemoralis can contain encapsulated trematode cercariae, with prevalences of 7% and 1%, respectively over the entire sample, and up to 47% at the local population level. To our knowledge, this is the first case study unambiguously showing that land snails can trap non-nematode parasites in their shell at non-negligible prevalences. Shell-encapsulation could be a more general defence mechanism than previously described, and more studies are needed to understand its importance and variability.
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