الفهرس 
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Abstract
The purpose of this study is to
Determine the withdrawal time of levofloxacin from liver, kidneys and breast muscles of broilers after intra¬muscular injection (I/M) of the drug (10 mg/kg for 4 consecutive days) by using HPLC .
Evaluate some hematological parameters (CBC) after intramuscular injection (I/M) of the drug (10 mg/kg for 4 consecutive days).
Evaluate some biochemical parameters as liver function enzymes (AST , ALT), kidney function enzymes (blood serum urea, creatinine) and antioxidants enzymes (SOD, GPX , CAT ) in blood serum .
Experimental design:
The study was conducted in twenty days (n= 40) healthy Rock-3 (IR-3), a strain of male broiler chicken in 4 groups equal 10 at each at a weight 1 kgm ±50 gm weight developed in Elabrar poultry company, Abohamad, Egypt.
The chickens were classified in 4 groups :
1st group : Conrol chicks non treated.