الفهرس 
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Abstract
The misuse of antibiotic and lack of respect to withdrawal time result in presence of antibiotic residues in meat which consider a major problem facing hygienists so prevention of residues in meat is a priority of the public health authorities.
So the present study was performed to determine the presence of antibiotic residues in local liver samples and imported frozen liver samples.
*Incidence of antibiotic residues in local and frozen livers:
One Hundred local liver samples were examined microbiologically for antibiotic residues, 5 local liver samples (5%) react positively with inhibition zone more than 2mm.
All Twenty examined Imported frozen liver samples were free from antibiotic residues.
* Detection of oxytetracycline residues by HPLC:
Oxytetracycline residues were found in local liver samples of large animals exceed permissiple limit .