الفهرس 
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Abstract
The present work was carried out at the department of Nutrition and Clinical Nutrition faculty of Veterinary Medicine kafrelsheikh University to study the dietary contamination with aflatoxin B1 (200ppb) with or without dietary supplementation of biological and/or chemical detoxicant for AFB1 using 180 Apparently healthy Nile tilapia fingerlings
This study evaluated clinical lesions and postmortem examination of fish, growth, feed efficiency and survival rate. Some blood constituents, biochemical parameters and histo - pathological changes were examined in all experimental groups.
The works had been attempted in the current study to reduce aflatoxin content in contaminated feeds to the so called (safety levels) for fish using chemical or biological techniques revealed limited success with superiority to the biological treatment.