Subtopic Deep Dive
Land Snail Helminth Parasites
Research Guide
What is Land Snail Helminth Parasites?
Land Snail Helminth Parasites studies nematode and cestode infections in terrestrial pulmonate snails, focusing on parasite biogeography linked to host phylogeography and habitat fragmentation.
Research documents Angiostrongylus cantonensis infections in Brazilian land snails like Sarasinula lingua (Caldeira et al., 2007, 160 citations) and Achatina fulica (Maldonado et al., 2010, 82 citations). Studies cover 21 Angiostrongylus species in wildlife hosts with aberrant mollusk infections (Spratt, 2015, 143 citations). Over 1,000 citations across 10 key papers track global spread and host defenses.
Why It Matters
Land snail helminth parasites reveal zoonotic risks from Angiostrongylus cantonensis causing eosinophilic meningitis via infected snails (Caldeira et al., 2007). Habitat fragmentation alters parasite diversity in pulmonates, impacting biodiversity conservation (Bargues et al., 2011). Veterinary diagnostics advance with serological tests for canine angiostrongylosis using snail intermediate hosts (Schnyder et al., 2014). These inform land use policies to curb parasite emergence (Spratt, 2015).
Key Research Challenges
Vector Specificity Identification
Distinguishing snail species as competent vectors remains difficult due to morphological similarities. Lymnaea schirazensis misidentification distorted fascioliasis data until genotyping clarified susceptibility (Bargues et al., 2011). Accurate vector mapping requires integrated phenotype-ecology studies.
Biogeography Mapping
Linking parasite distribution to host phylogeography challenges fragmented habitat tracking. Brazilian records of A. cantonensis in native and invasive snails highlight rapid spread (Caldeira et al., 2007; Maldonado et al., 2010). Climate models need refinement for prediction.
Host Defense Mechanisms
Gastropod haemocyte extracellular traps against Angiostrongylus larvae are newly documented but unquantified. ETosis provides early innate immunity evidence in pulmonates (Lange et al., 2017). Mechanisms vary by snail species and require proteomic analysis.
Essential Papers
First record of molluscs naturally infected with Angiostrongylus cantonensis (Chen, 1935) (Nematoda: Metastrongylidae) in Brazil
Roberta Lima Caldeira, Cristiane LGF Mendonça, Christiane Oliveira Goveia et al. · 2007 · Memórias do Instituto Oswaldo Cruz · 160 citations
Seeking the identification of Angiostrongylus cantonensis as a potential etiological agent of three clinical cases of eosinophilic meningitis, mollusc specimens were collected in the state of Espír...
Species of Angiostrongylus (Nematoda: Metastrongyloidea) in wildlife: A review
David M. Spratt · 2015 · International Journal for Parasitology Parasites and Wildlife · 143 citations
Twenty-one species of Angiostrongylus plus Angiostrongylus sp. (Nematoda: Metastrongyloidea) are known currently in wildlife. These occur naturally in rodents, tupaiids, mephitids, mustelids, procy...
Lymnaea schirazensis, an Overlooked Snail Distorting Fascioliasis Data: Genotype, Phenotype, Ecology, Worldwide Spread, Susceptibility, Applicability
M. Dolores Bargues, Patricio Artigas, Messaoud Khoubbane et al. · 2011 · PLoS ONE · 107 citations
<div><h3>Background</h3><p>Lymnaeid snails transmit medical and veterinary important trematodiases, mainly fascioliasis. Vector specificity of fasciolid parasites defines di...
Evaluation of a rapid device for serological in-clinic diagnosis of canine angiostrongylosis
Manuela Schnyder, Kathrina Stebler, Torsten J. Naucke et al. · 2014 · Parasites & Vectors · 91 citations
Fifth European Dirofilaria and Angiostrongylus Days (FiEDAD) 2016
Fernando Simón, Vladimir Kartashev, Javier González‐Miguel et al. · 2017 · Parasites & Vectors · 85 citations
peer reviewed
First report of Angiostrongylus cantonensis (Nematoda: Metastrongylidae) in Achatina fulica (Mollusca: Gastropoda) from Southeast and South Brazil
Arnaldo Maldonado, Raquel de Oliveira Simões, Ana Paula Martins de Oliveira et al. · 2010 · Memórias do Instituto Oswaldo Cruz · 82 citations
The rat lungworm Angiostrongylus cantonensis is a worldwide-distributed zoonotic nematode that can cause human eosinophilic meningoencephalitis. Here, for the first time, we report the isolation of...
Dirofilaria spp. and Angiostrongylus vasorum: Current Risk of Spreading in Central and Northern Europe
Hans‐Peter Fuehrer, Simone Morelli, Maria Sophia Unterköfler et al. · 2021 · Pathogens · 81 citations
In the past few decades, the relevance of Dirofilaria immitis and Dirofilaria repens, causing cardiopulmonary and subcutaneous dirofilariosis in dogs and cats, and of Angiostrongylus vasorum, causi...
Reading Guide
Foundational Papers
Start with Caldeira et al. (2007, 160 citations) for first natural infections in Brazilian snails, then Maldonado et al. (2010, 82 citations) for invasive host records, and Bolt et al. (1992, 73 citations) for reservoir dynamics.
Recent Advances
Study Spratt (2015, 143 citations) for 21 Angiostrongylus species review; Fuehrer et al. (2021, 81 citations) on European spread risks; Lange et al. (2017, 61 citations) on gastropod ETosis.
Core Methods
Genotyping and ecology (Bargues et al., 2011); serological diagnostics (Schnyder et al., 2014); extracellular trap assays (Lange et al., 2017); prevalence mapping from dissections (Caldeira et al., 2007).
How PapersFlow Helps You Research Land Snail Helminth Parasites
Discover & Search
Research Agent uses searchPapers and exaSearch to find 160-cited Caldeira et al. (2007) on Brazilian snail Angiostrongylus records, then citationGraph maps 21-species review by Spratt (2015, 143 citations) and connected works on pulmonate infections.
Analyze & Verify
Analysis Agent applies readPaperContent to extract infection prevalences from Maldonado et al. (2010), verifies via CoVe against Spratt (2015), and runPythonAnalysis computes biogeographic spread rates with pandas on habitat data; GRADE assigns A-grade evidence to Caldeira et al. (2007) for vector confirmation.
Synthesize & Write
Synthesis Agent detects gaps in ETosis studies post-Lange et al. (2017), flags contradictions in vector roles (Bargues et al., 2011), then Writing Agent uses latexEditText, latexSyncCitations for 50-paper review, and latexCompile generates formatted manuscripts with exportMermaid for host-parasite phylogenies.
Use Cases
"Analyze prevalence data from Angiostrongylus studies in land snails."
Research Agent → searchPapers('Angiostrongylus land snails') → Analysis Agent → runPythonAnalysis(pandas aggregation of Caldeira 2007 + Maldonado 2010 prevalences) → statistical summary table with p-values.
"Draft review on A. cantonensis in Brazilian pulmonates with citations."
Synthesis Agent → gap detection (Spratt 2015 gaps) → Writing Agent → latexEditText(structured sections) → latexSyncCitations(10 papers) → latexCompile → camera-ready PDF.
"Find code for snail parasite biogeography modeling."
Research Agent → paperExtractUrls('biogeography helminth snails') → paperFindGithubRepo → githubRepoInspect → runnable R script for MaxEnt modeling adapted from habitat fragmentation data.
Automated Workflows
Deep Research workflow scans 250M+ papers via OpenAlex for 'land snail Angiostrongylus', chains citationGraph on Caldeira et al. (2007), and outputs 50-paper systematic review report. DeepScan applies 7-step CoVe to verify ETosis claims in Lange et al. (2017) with GRADE checkpoints. Theorizer generates hypotheses linking Bargues et al. (2011) lymnaeid vectors to pulmonate phylogeography.
Frequently Asked Questions
What defines land snail helminth parasites?
Nematode (Angiostrongylus) and cestode infections in terrestrial pulmonates like Sarasinula and Achatina, tied to biogeography and fragmentation (Caldeira et al., 2007).
What are key methods in this field?
Morphological identification, genotyping for vectors (Bargues et al., 2011), haemocyte ETosis assays (Lange et al., 2017), serological diagnostics (Schnyder et al., 2014).
What are foundational papers?
Caldeira et al. (2007, 160 citations) first Brazilian records; Maldonado et al. (2010, 82 citations) in Achatina fulica; Bolt et al. (1992, 73 citations) fox reservoirs.
What open problems exist?
Quantifying ETosis efficacy across snail species; predicting spread under fragmentation; resolving cryptic vector genotypes beyond Lymnaea schirazensis (Bargues et al., 2011).
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Part of the Mollusks and Parasites Studies Research Guide