Abstract

Nowadays different kinds of antibiotics, due to their availability and low cost are using as therapeutic, prophylactic and nutritive purposes in livestock and poultry industries. Incorrect use of this drugs leads to deposit some residues in animal products, that is potentially hazardous for human health as it may cause allergic reactions in human and antibiotic resistance in pathogenic microorganisms. This study designed to investigate the occurrence of 4 common antibiotic residues in broiler chicken tissues, calves muscles of a military center staffs diet. 100 samples from chickens and calves were taken from slaughterhouses of Tehran which supply personnel's food of Tehran military center in 2012. Oxytetracycline, chloramphenicol, enrofeloxacin and penicillin residues measured by high performance liquid chromatography (HPLC) method and data is analysed by statistical softwares. Results show that the percentage of contamination and the mean level of enrofloxacin in poultry samples were 88 (0.73 mu g/kg) and 100 (2.57 mu g/kg) in summer and winter (MRL=75 mu g/kg) respectively. This rates were 100 for chloramphenicol in both seasons with means of 1.34 mu g/kg and 13.9 mu g/kg in summer and winter (MRL=0) respectively. In bout beefs, positive sample percent and mean level of penicillin in summer and winter were 76 (0.87 mu g/kg) and 92 (1.3 mu g/kg) respectively (MRL=4 mu g/kg). Oxytetracyclin were detected in 100 and 72 of samples, which their mean value was 3.5 mu g/kg and 4.61 mu g/kg in summer and winter respectively (MRL=100 mu g/kg). This study indicates the presence of different levels of antibiotic residues in 99 of samples. But non of samples were above MRLs except chloramphenicol that's prohibited in poultry industry and cause serious hazards for militaries. Moreover, gathering few amounts of different antibiotic seems to be a health threat for military force staffs.