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Fumonisin‐Contaminated Dietary Corn Reduced Survival and Antibody Production by Channel Catfish Challenged with Edwardsiella ictaluri
Author(s) -
Lumlertdacha Sonkphan,
Lovell Richard T.
Publication year - 1995
Publication title -
journal of aquatic animal health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 52
eISSN - 1548-8667
pISSN - 0899-7659
DOI - 10.1577/1548-8667(1995)007<0001:fcdcrs>2.3.co;2
Subject(s) - edwardsiella ictaluri , catfish , ictalurus , biology , fumonisin , zoology , mycotoxin , fumonisin b1 , inoculation , weight gain , aquaculture , body weight , food science , fishery , fish <actinopterygii> , horticulture , endocrinology
Year‐2 channel catfish Ictalurus punctatus (average initial weight, 31 g) were fed nutritionally balanced diets containing various amounts of corn culture material contaminated with the fungus Fusarium moniliforme . Quantities of culture material used provided 0.3 (control), 20, 80, 320, or 720 mg of the mycotoxin fumonisin B 1 (FB 1 ) per kilogram of diet. Fish fed the two highest concentrations of FB 1 lost weight during the 14‐week feeding period and experienced high mortality caused by Flexibacter columnaris . Fish fed the three lower concentrations for 14 weeks experienced no mortality, but those fed 80 mg FB 1 /kg showed significantly less weight gain. When challenged by immersion in an aqueous cell suspension of a virulent strain of Edwardsiella ictaluri , fish that had been fed 80 mg FB 1 /kg diet for 14 weeks had a significantly lower percentage survival than the fish fed 0.3 or 20 mg FB 1 /kg. Antibody production by fish fed 20 or 80 mg FB 1 /kg diet and inoculated with killed E. ictaluri cells was significantly lower after 14 d than antibody production by inoculated control fish. These results indicate that feeding year‐2 channel catfish corn material contaminated with F. moniliforme and containing fumonisins can reduce the fishes' growth and resistance to E. ictaluri infection.