scholarly journals The effect of foraging and ontogeny on the prevalence and intensity of the invasive parasite Anguillicola crassus in the European eel Anguilla anguilla

2017 ◽  
Vol 40 (9) ◽  
pp. 1213-1222 ◽  
Author(s):  
J Barry ◽  
M Newton ◽  
J A Dodd ◽  
D Evans ◽  
J Newton ◽  
...  
Keyword(s):  
Anguilla Anguilla ◽  
European Eel ◽  
Anguillicola Crassus

Effects of experimental infections with different doses of Anguillicola crassus (Nematoda, Dracunculoidea) on European eel (Anguilla anguilla)

Aquaculture ◽  
1996 ◽  
Vol 141 (1-2) ◽  
pp. 41-57 ◽  
Author(s):  
O.L.M. Haenen ◽  
T.A.M. van Wijngaarden ◽  
M.H.T. van der Heijden ◽  
J. Höglund ◽  
J.B.J.W. Cornelissen ◽  
...  
Keyword(s):  
Anguilla Anguilla ◽  
European Eel ◽  
Experimental Infections ◽  
Anguillicola Crassus ◽  
Different Doses

Glutathione-s-transferase is an important antigen in the eel nematode Anguillicola crassus

1997 ◽  
Vol 71 (4) ◽  
pp. 319-324 ◽  
Author(s):  
M.E. Nielsen ◽  
K. Buchmann
Keyword(s):  
Specific Antibody ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Anguilla Anguilla ◽  
European Eel ◽  
Glutathione S Transferase ◽  
Elisa System ◽  
Humoral Immune ◽  
Anguillicola Crassus ◽  
Reducing Conditions

AbstractDifferent organs and secretions/excretions of the swimbladder parasite, Anguillicola crassus (Nematoda), were tested for the presence of antigens to the humoral immune response previously detected in the European eel, Anguilla anguilla. Proteins from different fractions of Anguillicola crassus were separated using SDS–PAGE (sodium-dodecyl-sulphate polyacrylamide-gel electrophoresis) under reducing conditions and electroblotted onto nitrocellulose membranes. Infected eels showed a specific antibody response to a 43 kDa antigen in the cuticle and towards two gonad antigens around 34 and 43 kDa. In protein released from the worms, two secretory/excretory antigens of approximately 28 kDa were found. The secretion/excretion rate of protein from the parasite to the surroundings was determined. Subsequently, an ELISA system was established applying these antigens as the first layer of coating. Furthermore, antigens from Anguillicola crassus were examined for the presence of glutathione-s-transferase (GST) using a specific antibody against GST. The antigens were found to be subunits of GST.

scholarly journals Transcriptome analyses of Anguillicola crassus from native and novel hosts

2014 ◽  
Author(s):  
Emanuel Heitlinger ◽  
Horst H. Taraschewski ◽  
Urszula Weclawski ◽  
Karim Gharbi ◽  
Mark Blaxter
Keyword(s):  
Population Differentiation ◽  
Anguilla Anguilla ◽  
Common Garden ◽  
European Eel ◽  
New Host ◽  
Phenotypic Differences ◽  
Secretion Signal ◽  
Anguillicola Crassus ◽  
The Face ◽  
Parasite Populations

Anguillicola crassus is a swim bladder nematode of eels. The parasite is native to the Asian eel Anguilla japonica, but was introduced to Europe and the European eel Anguilla anguilla in the early 1980s. A Taiwanese source has been proposed for this introduction. In the new host in the recipient area, the parasite appears to be more pathogenic. As a reason for these differences, genetically fixed differences in infectivity and development between Taiwanese and European A.crassus have been described and disentangled from plasticity induced by different host environments.To explore whether transcriptional regulation is involved in these lifecycle differences, we have analysed a “common garden”, cross infection experiment, using deep-sequencing transcriptomics. Surprisingly, in the face of clear phenotypic differences in life history traits, we identified no significant differences in gene expression between parasite populations or between experimental host species. From 120,000 SNPs identified in the transcriptome data we found that European A. crassus were not a genetic subset of the Taiwanese nematodes sampled. The loci that have the major contribution to the European-Taiwanese population differentiation show an enrichment of synonymous and non-coding polymorphism. This argues against positive selection in population differentiation. However, genes involved in protein processing in the endoplasmatic reticulum membrane and genes bearing secretion signal sequences were enriched in the set of genes most differentiated between European and Taiwanese A. crassus. These genes could be a source for the phenotypically visible genetically fixed differences between European and Taiwanese A. crassus.

scholarly journals Transcriptome analyses of Anguillicola crassus from native and novel hosts

2014 ◽  
Author(s):  
Emanuel Heitlinger ◽  
Horst H. Taraschewski ◽  
Urszula Weclawski ◽  
Karim Gharbi ◽  
Mark Blaxter
Keyword(s):  
Population Differentiation ◽  
Anguilla Anguilla ◽  
Common Garden ◽  
European Eel ◽  
New Host ◽  
Phenotypic Differences ◽  
Secretion Signal ◽  
Anguillicola Crassus ◽  
The Face ◽  
Parasite Populations

Anguillicola crassus is a swim bladder nematode of eels. The parasite is native to the Asian eel Anguilla japonica, but was introduced to Europe and the European eel Anguilla anguilla in the early 1980s. A Taiwanese source has been proposed for this introduction. In the new host in the recipient area, the parasite appears to be more pathogenic. As a reason for these differences, genetically fixed differences in infectivity and development between Taiwanese and European A.crassus have been described and disentangled from plasticity induced by different host environments.To explore whether transcriptional regulation is involved in these lifecycle differences, we have analysed a “common garden”, cross infection experiment, using deep-sequencing transcriptomics. Surprisingly, in the face of clear phenotypic differences in life history traits, we identified no significant differences in gene expression between parasite populations or between experimental host species. From 120,000 SNPs identified in the transcriptome data we found that European A. crassus were not a genetic subset of the Taiwanese nematodes sampled. The loci that have the major contribution to the European-Taiwanese population differentiation show an enrichment of synonymous and non-coding polymorphism. This argues against positive selection in population differentiation. However, genes involved in protein processing in the endoplasmatic reticulum membrane and genes bearing secretion signal sequences were enriched in the set of genes most differentiated between European and Taiwanese A. crassus. These genes could be a source for the phenotypically visible genetically fixed differences between European and Taiwanese A. crassus.

The effect of different infection levels with infective larvae of Anguillicola crassus on haematological parameters of European eel (Anguilla anguilla)

Aquaculture ◽  
1990 ◽  
Vol 87 (3-4) ◽  
pp. 243-253 ◽  
Author(s):  
J.H. Boon ◽  
V.M.H. Cannaerts ◽  
H. Augustijn ◽  
M.A.M. Machiels ◽  
D. De Charleroy ◽  
...  
Keyword(s):  
Anguilla Anguilla ◽  
Haematological Parameters ◽  
European Eel ◽  
Infective Larvae ◽  
Anguillicola Crassus
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