An enhanced humoral immune response against the swimbladder nematode, Anguillicola crassus, in the Japanese eel, Anguilla japonica, compared with the European eel, A. anguilla

Journal of Helminthology - Tập 73 Số 3 - Trang 227-232 - 1999
Michael Engelbrecht Nielsen1
1University of Copenhagen

Tóm tắt

The humoral immune response in the two eel species,Anguilla japonicaandAnguilla anguillaagainst two fractions of antigens inAnguillicola crassuswere studied.Within species, both eel species showed significantly elevated titres compared with controls when immunized with antigens fromAnguillicola crassus.In interspecific comparison,Anguilla japonicashowed significantly elevated titres in comparison withAnguilla anguilla. Immunization ofAnguilla anguillacaused a significantly decrease in the plasma levels of protein in comparison with control fish and all groups ofAnguilla japonica.In contrast,Anguilla japonicashowed significantly lower plasma levels of Ig in all groups compared withAnguilla anguilla.The different susceptibilities toAnguillicola crassusbetween the natural host,Anguilla japonica, and the naı¨ve,Anguilla anguilla, is partly due to differences in the ability of the two eel species to mount a humoral immune response.

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