| Autor: |
Ryerse, Ian A, Hooft, Jamie M, Bureau, Dominique P, Anthony Hayes, M, Lumsden, John S |
| Předmět: |
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| Zdroj: |
Aquaculture Research; Mar2016, Vol. 47 Issue 3, p787-796, 10p |
| Abstrakt: |
The objective of this study was to determine if deoxynivalenol (DON) exposure alters the susceptibility of rainbow trout to bacterial coldwater disease caused by Flavobacterium psychrophilum. Rainbow trout were fed a nutritionally complete diet containing corn that was naturally contaminated with DON at a desired concentration of <0.5 (control and pair-fed treatments), 4 or 6 ppm over 7 weeks to apparent satiation. After 4 weeks, fish were infected by intraperitoneal injection with F. psychrophilum (3.03x106 CFU mL−1) via intraperitoneal injection and monitored for morbidity and mortality. A significant linear reduction in feed intake was associated with increasing dietary levels of DON contamination over the initial 4 weeks. There was a significant reduction ( P < 0.05) in cumulative per cent mortality in DON-fed groups (4.1 ppm, 11%; 5.9 ppm, 7%) in comparison to control (46%) and pair-fed (25%) groups at 21 days post infection. Mortality of trout pair-fed the control diet was also significantly lower ( P < 0.05) than the control group fed to apparent satiation. A replicate trial using genetically similar fish and the same experimental design produced similar results. These results suggest that DON exposure and restricted feed intake provided a protective effect for rainbow trout infected with F. psychrophilum. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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