Host records and geographical distribution of Corynosoma magdaleni, C. semerme and C. strumosum (Acanthocephala: Polymorphidae)

Leidenberger, Sonja; Boström, Sven; Wayland, Matthew T.

doi:10.3897/bdj.8.e50500

Cited by 11 publications

(13 citation statements)

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“…strumosum (Anikieva et al, 2018 and reference therein). The same intermediate and paratenic hosts are also suitable for C. semerme (Leidenberger et al, 2020), which is nevertheless absent from Lake Saimaa. Hence, the loss of C. semerme from Lake Saimaa may simply be a result of stochastic effects during colonization (as suggested by Sinisalo et al, 2003) or past fluctuations in the size of the Saimaa ringed seal population (cf.…”

Section: Determinants Of Corynosoma Species Richnessmentioning

confidence: 90%

“…Here, we investigated how host population history and size influence community composition, population-genetic structure, and genetic diversity of thorny-headed worms belonging to the genus Corynosoma Lühe, 1904 (Acanthocephala: Polymorphidae) in ringed and gray seals inhabiting marine, brackish, and freshwater environments in northern Europe (Figure 1). Marine seals generally support diverse parasite communities consisting of many taxonomic groups, including acanthocephalans, nematodes, cestodes, trematodes, and arthropods (Leidenberger et al, 2007(Leidenberger et al, , 2020Reckendorf et al, 2019;Walden et al, 2020). In contrast to several other parasite taxa, Corynosoma were able to adapt to brackish and freshwater environments when ringed seals colonized the Baltic Sea basin and large postglacial lakes that were formed at the end of the Pleistocene.…”

Section: Introductionmentioning

confidence: 99%

“…Corynosoma are small to medium-sized intestinal worms (typically 2-15 mm) with complex life cycles involving crustaceans (amphipods or isopods) as intermediate hosts, teleost fish as paratenic hosts, and marine mammals and seabirds as final hosts (Figure 1d) (Aznar et al, 2016;García-Varela & de León, 2015;Leidenberger et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…However, these traditional views of Corynosoma community diversity remain to be confirmed, because morphological identification of Corynosoma specimens has proven to be very challenging due to their reduced and variable morphology (Aznar et al, 2006;Leidenberger et al, 2019;Nickol et al, 2002). For example, in the Baltic Sea and lakes Ladoga and Saimaa, the traditional broad concept of C. strumosum was in the early 2000s gradually replaced by a division into C. magdaleni and a more narrowly defined C. strumosum (Leidenberger et al, 2020;Nickol et al, 2002;Sinisalo, 2007;Valtonen et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Loss of species and genetic diversity during colonization: Insights from acanthocephalan parasites in northern European seals

Sromek,

Ylinen,

Kunnasranta

et al. 2023

Ecology and Evolution

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Studies on host–parasite systems that have experienced distributional shifts, range fragmentation, and population declines in the past can provide information regarding how parasite community richness and genetic diversity will change as a result of anthropogenic environmental changes in the future. Here, we studied how sequential postglacial colonization, shifts in habitat, and reduced host population sizes have influenced species richness and genetic diversity of Corynosoma (Acanthocephala: Polymorphidae) parasites in northern European marine, brackish, and freshwater seal populations. We collected Corynosoma population samples from Arctic, Baltic, Ladoga, and Saimaa ringed seal subspecies and Baltic gray seals, and then applied COI barcoding and triple‐enzyme restriction‐site associated DNA (3RAD) sequencing to delimit species, clarify their distributions and community structures, and elucidate patterns of intraspecific gene flow and genetic diversity. Our results showed that Corynosoma species diversity reflected host colonization histories and population sizes, with four species being present in the Arctic, three in the Baltic Sea, two in Lake Ladoga, and only one in Lake Saimaa. We found statistically significant population‐genetic differentiation within all three Corynosoma species that occur in more than one seal (sub)species. Genetic diversity tended to be high in Corynosoma populations originating from Arctic ringed seals and low in the landlocked populations. Our results indicate that acanthocephalan communities in landlocked seal populations are impoverished with respect to both species and intraspecific genetic diversity. Interestingly, the loss of genetic diversity within Corynosoma species seems to have been less drastic than in their seal hosts, possibly due to their large local effective population sizes resulting from high infection intensities and effective intra‐host population mixing. Our study highlights the utility of genomic methods in investigations of community composition and genetic diversity of understudied parasites.

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Section: Determinants Of Corynosoma Species Richnessmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Loss of species and genetic diversity during colonization: Insights from acanthocephalan parasites in northern European seals

Sromek,

Ylinen,

Kunnasranta

et al. 2023

Ecology and Evolution

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“…Definitive hosts are seals, walrus, beluga whale. Zoonotic in humans ( Aznar et al 2006 ; Leidenberger et al 2020 ; Nickol et al 2002 ).…”

Section: Checklist Of Eukaryotic Human Parasitesmentioning

confidence: 99%

An annotated checklist of the eukaryotic parasites of humans, exclusive of fungi and algae

Mathison¹,

Sapp²

2021

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The classification of “parasites” in the medical field is a challenging notion, a group which historically has included all eukaryotes exclusive of fungi that invade and derive resources from the human host. Since antiquity, humans have been identifying and documenting parasitic infections, and this collective catalog of parasitic agents has expanded considerably with technology. As our understanding of species boundaries and the use of molecular tools has evolved, so has our concept of the taxonomy of human parasites. Consequently, new species have been recognized while others have been relegated to synonyms. On the other hand, the decline of expertise in classical parasitology and limited curricula have led to a loss of awareness of many rarely encountered species. Here, we provide a comprehensive checklist of all reported eukaryotic organisms (excluding fungi and allied taxa) parasitizing humans resulting in 274 genus-group taxa and 848 species-group taxa. For each species, or genus where indicated, a concise summary of geographic distribution, natural hosts, route of transmission and site within human host, and vectored pathogens are presented. Ubiquitous, human-adapted species as well as very rare, incidental zoonotic organisms are discussed in this annotated checklist. We also provide a list of 79 excluded genera and species that have been previously reported as human parasites but are not believed to be true human parasites or represent misidentifications or taxonomic changes.

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Fish Acanthocephalans as Potential Human Pathogens

Buchmann,

Karami

2024

Curr Clin Micro Rpt

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Purpose of Review Acanthocephalans attach to the gastro-intestinal mucosa of the host (mammals, birds, reptiles, amphibians, fish) by use of a proboscis equipped with a series of hooks. Teleosts serve as definitive hosts to some acanthocephalans, which can affect the nutritive status of the fish, due to absorption of nutrients in the gut, but they are not infective to humans. Other acanthocephalans, residing as larvae/juveniles in other compartments of the fish, apply mammals (whales, seals) as definitive hosts. They are as shown in this review potentially zoonotic, as consumption of live larvae in infected fish may lead to human infection associated with severe abdominal symptoms. Recent Findings Acanthocephalans, belonging to the genera Bolbosoma and Corynosoma, occur in their larval/juvenile stage in various body compartments of fish (paratenic hosts). They use marine mammals (cetaceans and pinnipeds) as definitive hosts, in which the adult parasite attaches to the gastro-intestinal mucosa. Eggs from the female acanthocephalan leave the host with faeces, and in the marine environment, they are ingested by small crustaceans (amphipods, isopods, copepods, krill), serving as intermediate hosts. When fish ingest the infected crustacean, the larva will infect the fish (then serving as paratenic host) awaiting predation by a marine mammal. Human consumption of raw or semi-raw fish dishes may lead to infection, development of symptoms, hospitalization and in some cases surgery. Summary Increases of marine mammal populations (seals and whales) in marine waters with exploitable fish stocks may increase the general infection pressure and thereby increase occurrence (prevalence and intensity) of the larval stages in fish. This may increase the risk of human infection. Preventive measures (prior freezing or heat treatment) are recommended before consumption of fishery products.

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Host records and geographical distribution of Corynosoma magdaleni, C. semerme and C. strumosum (Acanthocephala: Polymorphidae)

Cited by 11 publications

References 50 publications

Loss of species and genetic diversity during colonization: Insights from acanthocephalan parasites in northern European seals

Loss of species and genetic diversity during colonization: Insights from acanthocephalan parasites in northern European seals

An annotated checklist of the eukaryotic parasites of humans, exclusive of fungi and algae

Fish Acanthocephalans as Potential Human Pathogens

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