الفهرس 
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Abstract
The present experiment was performed to investigate the protectiveeffect of vitamin C and E against the toxic impact of copper on growthperformance, hematological, some biochemical parameters, DNA damageinbroilersaswellas, pathological changes
Onehundredchicksweredividedinto5groups,eachgroupcontained20chicks.
group 1: was given a normal ration from one day old till the end oftheexperiment(6 weeks)
group 2: was given a ration contained 350 mg copper sulphate /kgration fromone dayoldfor6weeks
group 3: was given a ration contained 350 mg copper sulphate /kgration +250 mg vitamin C/kg ration fromonedayoldfor6weeks
group 4: was given a ration contained 350 mg copper sulphate /kgration +250 mg vitaminE/kg ration fromonedayold for6weeks
group 5: wasgiven a ration contained 350 mg copper sulphate /kgration + 250 mg vitamin C /kg ration + 250 mg vitamin E /kg rationfromone dayoldfor6weeks.
Chicks of all groups were observed and clinically examined. Thebodyweight,feedconsumption,bodyweightgainandFCRwerecalculated andrecordedweekly.
Five chicks from each group were used for the collecting bloodsamples. Blood samples were collected from each bird from wing vein attheend of3rdand6thweek anddividedinto2parts.