64 results for Anguillicola crassus (eel swim bladder parasite)

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Impact ID Scientific Name Impact Type Study Type Study Location Impact Description Geographic Location Reference
5753 Anguillicola crassus Disease/Parasite/Toxicity Anecdotal N/A Anguillicola crassus damages eel swimbladders, thereby increasing mortality or reducing swimming capabilities. 38462
5754 Anguillicola crassus Disease/Parasite/Toxicity Observational Field A small number of American eels Anguilla rostrata collected from North Carolina waterways that had Anguillicola crassus nematode infections had lesions around anus and damage to swim bladders. There were few other signs of negative effects. North Carolina, USA 38765
5756 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Eels with Anguillicola crassus have damage to swim bladder walls, including dilation and congestion of blood vessels, inflammation, hemorrhaging, and fibrosis. Damage to the swim bladder increased with the number of nematodes in swim bladder wall, and larger eels had higher levels of nematodes. United Kingdom 40137
5758 Anguillicola crassus Disease/Parasite/Toxicity Observational Field American eels, Anguilla rostrata, with Anguillicola crassus infections had larger spleens and livers, possibly indicating a hematological or immunological response to infection. Nova Scotia & New Brunswick 40140
5760 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Anguillicola crassus infection helped cause secondary bacterial infections in farmed European eels, Anguilla anguilla. Secondary infections were caused by Aeromonas hydrophila and Pseudomonas spp. Netherlands 40136
5763 Anguillicola crassus Disease/Parasite/Toxicity Observational Field European eels (Anguilla anguilla) collected from commercial fishermen with Anguillicola crassus infections had empty, thickened swim bladders. Netherlands 40165
5764 Anguillicola crassus Disease/Parasite/Toxicity Experimental Laboratory Anguillicola crassus can infect several paratenic fish host species to various degrees, including gobies, ruffe, and cyprinids which are food sources for eels. Infection of eels can lead to infection in fish. Lake Balaton, Hungary 40160
5765 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Anguillicola crassus infections and consequential die-offs of European eels (Anguilla anguilla) in Lake Balaton varied geographically and environmental factors, such as temperature. Regardless of region, infected eels still had inflamed and thickened swim bladders. Lake Balaton, Hungary 40155
5766 Anguillicola crassus Disease/Parasite/Toxicity Observational Field European eels (Anguilla anguilla) that lived exclusively in freshwater had lower muscle fat content and higher Anguillicola crassus. Higher infections rates combined with low fat content will likely impair transoceanic spawning migration of eels. Baltic Sea 40152
5767 Anguillicola crassus Disease/Parasite/Toxicity Observational Field While American eels (Anguilla rostrata) infected by Anguillicola crassus did not show signs of severe infection, they did show signs of damage to the swim bladders. Evidence of damage includes opacity, black pigments, and remnants of dead worms. Harper's Ferry, West Virginia 40150
5770 Anguillicola crassus Disease/Parasite/Toxicity Experimental N/A Significant mortality term estimates of force-of-infection model indicated eels with more severe Anguillicola crassus infection had lower survival rates. Chesapeake Bay 40149
5773 Anguillicola crassus Disease/Parasite/Toxicity Observational Field American eels, Anguilla rostrata, with Anguillicola crassus had significantly lower spleen, liver, and eviscerated mass. This indicates that adult eels with parasite infection could have anemia or reduction in energy stores. These effects were most severe in smaller eels due to higher parasite to eel body mass ratio. South Carolina 40142
6098 Anguillicola crassus Disease/Parasite/Toxicity Observational Field European eels (Anguilla anguilla) that inhabited freshwaters had significantly lower muscle fat contents and more serious infections than eels that never entered freshwaters. Since low Anguillicola crassus infection intensities and high fat contents are necessary for successful transoceanic spawning migration, which might impair reproductive success. Baltic Sea 40152
6112 Anguillicola crassus Disease/Parasite/Toxicity Observational Field The digestive tract of Anguillicola crassus nematodes were full of erythrocytes indicating they feed on blood. Netherlands 40136
6113 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Physical effects of Anguillicola crassus swim bladder infections in wild and farmed European eels included acute inflammatory reactions, dilation of blood vessels, formation of connective tissue, fibrosis and fibrotic conglomerates, microscopical lesions from nematode tunneling, and rupture of the swim bladder. Eels also had open ulcers on underside and inflamed anuses. Netherlands 40136
6114 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Wild European eels with Anguillicola crassus infections had thickened swim bladder walls and almost no gas. Many of the swim bladders had collapsed. Netherlands 40165
6115 Anguillicola crassus Disease/Parasite/Toxicity Observational Field In Vistula Lagoon, stage 3 Anguillicola crassus larvae were recorded in carp bream, ziege, roach, zander, European perch, and ruffe. The ruffe is believed to be the primary paratenic host. Vista Lagoon, Poland 40933
6117 Anguillicola crassus Disease/Parasite/Toxicity Experimental Laboratory In a lab experiment, wild caught European eels with more severe swim bladder damage from Anguillicola crassus infections and died sooner in hypoxic conditions. Vaccares Lagoon, France 40934
6118 Anguillicola crassus Disease/Parasite/Toxicity Observational Field European eels with Anguillicola crassus infections had patho-anatomical changes in the swim bladder and ductus pneumaticus. The swim bladder had petechiae, reduced size, and thickening walls. Dark hemorrhagic fluid was in the ductus pneumaticus. Koryãany Water Reservoir, Czech Republic 40935
6119 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Erythrocytes of European eels with Anguillicola crassus infections in the swim bladder were more susceptible to hypotonic solutions of NaCl, indicating increased osmotic and cell membrane fragility. Lake IJssel, The Netherlands 40936
6120 Anguillicola crassus Disease/Parasite/Toxicity Observational Field European eels infected with Anguillicola crassus had decreased hematocrit and plasma proteins. These differences are from larval nematodes migrating from the stomach to the swim bladder and the blood feeding by adults. Netherlands 40937
6121 Anguillicola crassus Disease/Parasite/Toxicity Experimental Laboratory Plasma glucose concentrations in wild caught European eels infected with Anguillicola crassus rose increased at different rates than uninfected eels after exposure to stress. Glucose mobilization and utilization may be altered in infected European eels from the metabolic strain of harboring a blood-feeding parasite. Therefore, repeated exposure to stressors may decrease growth and yield in infected eels. Slapton Ley, Devon, England 40939
6123 Anguillicola crassus Disease/Parasite/Toxicity Experimental Laboratory The severity of Anguillicola crassus infection symptoms (thickened swim bladder, hemorrhages in swim bladder, and congestion of swim bladder blood vessels) were significantly worse in European eels that received higher parasite doses and were reinfected. Enzyme-linked immunosorbent assays showed no evidence that reinfected eels build an antibody response or resistance. 40942
6124 Anguillicola crassus Disease/Parasite/Toxicity Observational Field Brown bullhead, pumpkinseed, and bluegill collected from the Paskamansett River were infected with larval Anguillicola crassus. There were no signs of necrosis or host reaction. These were new records of paratenic hosts of Anguillicola crassus in US. Paskamansett River, Massachusetts, US 40944
6134 Anguillicola crassus Disease/Parasite/Toxicity Experimental Laboratory European eels infected with Anguillicola crassus had lower humoral and cellular immunity were significantly lower. This indicates that Anguillicola crassus infestation decreases eel immune response and makes eels more susceptible to other pathogens. 40954
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