Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy?
Abstract Background The invasive eel parasite Anguillicoloides crassus (syn. Anguillicola crassus) is considered one of the major causes for the decline of the European eel (Anguilla anguilla) panmictic population. It impairs the swim bladder function and reduces swimming performance of its host. Th...
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ftdoajarticles:oai:doaj.org/article:f295f7ee020f416db7802cad9813155c 2023-07-02T03:29:36+02:00 Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? Sebastian Emde Sonja Rueckert Judith Kochmann Klaus Knopf Bernd Sures Sven Klimpel 2014-11-01T00:00:00Z https://doi.org/10.1186/s13071-014-0504-8 https://doaj.org/article/f295f7ee020f416db7802cad9813155c EN eng BMC https://doi.org/10.1186/s13071-014-0504-8 https://doaj.org/toc/1756-3305 doi:10.1186/s13071-014-0504-8 1756-3305 https://doaj.org/article/f295f7ee020f416db7802cad9813155c Parasites & Vectors, Vol 7, Iss 1, Pp 1-5 (2014) Anguillicoloides crassus Invasive species Neogobius melanostomus Life cycle strategy Parasite infection Intermediate host Infectious and parasitic diseases RC109-216 article 2014 ftdoajarticles https://doi.org/10.1186/s13071-014-0504-8 2023-06-11T00:37:40Z Abstract Background The invasive eel parasite Anguillicoloides crassus (syn. Anguillicola crassus) is considered one of the major causes for the decline of the European eel (Anguilla anguilla) panmictic population. It impairs the swim bladder function and reduces swimming performance of its host. The life cycle of this parasite involves different intermediate and paratenic hosts. Despite an efficient immune system of the paratenic fish hosts acting against infections with A. crassus, levels of parasitized eels remain high in European river systems. Recently, the round goby Neogobius melanostomus (Gobiidae) has become dominant in many rivers in Europe and is still spreading at a rapid pace. This highly invasive species might potentially act as an important, so far neglected paratenic fish host for A. crassus. Methods Based on own observations and earlier single sightings of A. crassus in N. melanostomus, 60 fresh individuals of N. melanostomus were caught in the Rhine River and examined to assess the infection levels with metazoan parasites, especially A. crassus. Glycerin preparations were used for parasite identification. Results The parasite most frequently found in N. melanostomus was the acanthocephalan Pomphorhynchus sp. (subadult stage) which occurred mainly encysted in the mesenteries and liver. Every third gobiid (P = 31.7%) was infected by A. crassus larvae (L3) which exclusively occurred inside the acanthocephalan cysts. No intact or degenerated larvae of A. crassus were detected elsewhere in the goby, neither in the body cavity and mesenteries nor in other organs. Affected cysts contained the acanthocephalan larvae and 1-12 (mI =3) living A. crassus larvae. Additionally, encysted larvae of the nematode Raphidascaris acus were detected in the gobies, but only in the body cavity and not inside the acanthocephalan cysts. Conclusions Based on our observations, we suggest that A. crassus might actively bypass the immune response of N. melanostomus by invading the cysts of acanthocephalan parasites of the ... Article in Journal/Newspaper Anguilla anguilla European eel Directory of Open Access Journals: DOAJ Articles Parasites & Vectors 7 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Anguillicoloides crassus Invasive species Neogobius melanostomus Life cycle strategy Parasite infection Intermediate host Infectious and parasitic diseases RC109-216 |
spellingShingle |
Anguillicoloides crassus Invasive species Neogobius melanostomus Life cycle strategy Parasite infection Intermediate host Infectious and parasitic diseases RC109-216 Sebastian Emde Sonja Rueckert Judith Kochmann Klaus Knopf Bernd Sures Sven Klimpel Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? |
topic_facet |
Anguillicoloides crassus Invasive species Neogobius melanostomus Life cycle strategy Parasite infection Intermediate host Infectious and parasitic diseases RC109-216 |
description |
Abstract Background The invasive eel parasite Anguillicoloides crassus (syn. Anguillicola crassus) is considered one of the major causes for the decline of the European eel (Anguilla anguilla) panmictic population. It impairs the swim bladder function and reduces swimming performance of its host. The life cycle of this parasite involves different intermediate and paratenic hosts. Despite an efficient immune system of the paratenic fish hosts acting against infections with A. crassus, levels of parasitized eels remain high in European river systems. Recently, the round goby Neogobius melanostomus (Gobiidae) has become dominant in many rivers in Europe and is still spreading at a rapid pace. This highly invasive species might potentially act as an important, so far neglected paratenic fish host for A. crassus. Methods Based on own observations and earlier single sightings of A. crassus in N. melanostomus, 60 fresh individuals of N. melanostomus were caught in the Rhine River and examined to assess the infection levels with metazoan parasites, especially A. crassus. Glycerin preparations were used for parasite identification. Results The parasite most frequently found in N. melanostomus was the acanthocephalan Pomphorhynchus sp. (subadult stage) which occurred mainly encysted in the mesenteries and liver. Every third gobiid (P = 31.7%) was infected by A. crassus larvae (L3) which exclusively occurred inside the acanthocephalan cysts. No intact or degenerated larvae of A. crassus were detected elsewhere in the goby, neither in the body cavity and mesenteries nor in other organs. Affected cysts contained the acanthocephalan larvae and 1-12 (mI =3) living A. crassus larvae. Additionally, encysted larvae of the nematode Raphidascaris acus were detected in the gobies, but only in the body cavity and not inside the acanthocephalan cysts. Conclusions Based on our observations, we suggest that A. crassus might actively bypass the immune response of N. melanostomus by invading the cysts of acanthocephalan parasites of the ... |
format |
Article in Journal/Newspaper |
author |
Sebastian Emde Sonja Rueckert Judith Kochmann Klaus Knopf Bernd Sures Sven Klimpel |
author_facet |
Sebastian Emde Sonja Rueckert Judith Kochmann Klaus Knopf Bernd Sures Sven Klimpel |
author_sort |
Sebastian Emde |
title |
Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? |
title_short |
Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? |
title_full |
Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? |
title_fullStr |
Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? |
title_full_unstemmed |
Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy? |
title_sort |
nematode eel parasite found inside acanthocephalan cysts - a "trojan horse" strategy? |
publisher |
BMC |
publishDate |
2014 |
url |
https://doi.org/10.1186/s13071-014-0504-8 https://doaj.org/article/f295f7ee020f416db7802cad9813155c |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Parasites & Vectors, Vol 7, Iss 1, Pp 1-5 (2014) |
op_relation |
https://doi.org/10.1186/s13071-014-0504-8 https://doaj.org/toc/1756-3305 doi:10.1186/s13071-014-0504-8 1756-3305 https://doaj.org/article/f295f7ee020f416db7802cad9813155c |
op_doi |
https://doi.org/10.1186/s13071-014-0504-8 |
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Parasites & Vectors |
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7 |
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