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  • Title: Effect of aflatoxin-contaminated feed on morbidity and residues in walleye fish.
    Author: Hussain M, Gabal MA, Wilson T, Summerfelt RC.
    Journal: Vet Hum Toxicol; 1993 Oct; 35(5):396-8. PubMed ID: 8249258.
    Abstract:
    The effect of aflatoxin in the feed on the morbidity and toxin residue in the musculature of walleye fish was studied. The fish were divided into 3 groups of 12 each; group 1 served as controls, groups 2 and 3 received feed treated with 50 or 100 ppb toxin for 30 d respectively. Fish were kept in glass aquaria, 4 fish/aquarium, with aerator and solids-waste filter system. Fish were observed for morbidity and mortality. Six fish from each group were sacrificed after 30 d and examined for gross pathological lesions and histopathological changes. In addition, fish musculature were analyzed for aflatoxin. One out of 16 (8%) of the fish fed 100 ppb aflatoxin in 48 h. Pale livers and significant degenerative changes were observed in both toxin-treated groups. Aflatoxin B1, G1 and G2 were detected in the musculature of both groups at a concentration of 5, 10, 15, 20 ppb respectively. After 2 w of aflatoxin withdrawal, no aflatoxin was detectable in the fish muscle. However, marked histopathological lesions were still observed.
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