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- Title
Exposure to Feedborne Mycotoxins T-2 Toxin or Ochratoxin A Causes Increased Mortality of Channel Catfish Challenged with.
- Authors
Manning, Bruce B.; Terhune, Jeffery S.; Li, Menghe H.; Robinson, Edwin H.; Wise, David J.; Rottinghaus, George E.
- Abstract
To evaluate the effect of mycotoxins on the disease resistance of juvenile channel catfish , we conducted an experiment in aquaria under controlled environmental conditions. Catfish were fed a nutritionally complete semipurified diet containing two concentrations of either T-2 toxin (1.0 or 2.0 mg/kg diet) or ochratoxin A (OA; 2.0 or 4.0 mg/kg diet). Mycotoxins were supplied as pure, crystalline T-2 toxin diluted to a known concentration in a carrier of casein and culture material containing a known concentration of OA. After 6 weeks of feeding, catfish were challenged by immersion in situ with a virulent isolate of suspended in nutrient broth that provided an estimated 2.25 × 106 colony forming units per milliliter of water. At 21 d postchallenge, significantly ( P < 0.05) greater mortalities occurred among catfish fed T-2 toxin, 1.0 or 2.0 mg/kg diet (84.11% and 99.30%, respectively) than among control fish. Fish fed the OA diet (4.0 mg/kg) also had significantly higher mortality (80.49%) than control-fed catfish, which experienced 68.28% mortality. Results indicate that juvenile channel catfish fed feedborne mycotoxins T-2 toxin or OA had significantly greater mortality when challenged with .
- Publication
Journal of Aquatic Animal Health, 2005, Vol 17, Issue 2, p147
- ISSN
0899-7659
- Publication type
Article
- DOI
10.1577/H03-063.1