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Diseases of Aquatic Organisms

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DAO 56:181-184 (2003)  -  doi:10.3354/dao056181

Antibodies against Discocotyle sagittata (Monogenea) in farmed trout

Miguel Rubio-Godoy1,*, Jens Sigh2, Kurt Buchmann2, Richard C. Tinsley1

1School of Biological Sciences, University of Bristol, Bristol BS8 1UG, UK
2Department of Veterinary Microbiology, Section of Fish Diseases, Royal Veterinary and Agricultural University, 4 Stigbøjlen, 1870 Frederiksberg C., Denmark

ABSTRACT: The relationship between Discocotyle sagittata intensities and host length, weight and specific anti-parasite antibody titres was studied in 3 year-classes of farmed rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta at the end of the annual transmission cycle. Antibody titres were significantly higher in infected farmed fish than in naïve controls, indicating that infection elicits immunoglobulin production. No correlation was found between host size and parasite burdens, nor between infection intensities and antibody titres.

KEY WORDS: Trout · Oncorhynchus mykiss · Salmo trutta · Monogenea · Discocotyle sagittata · Antibodies

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