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首页> 外文期刊>Global Veterinaria >Tetracycline Residue Levels in Slaughtered Beef Cattle from Three Slaughterhouses in Central Ethiopia
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Tetracycline Residue Levels in Slaughtered Beef Cattle from Three Slaughterhouses in Central Ethiopia

机译：埃塞俄比亚中部三个屠宰场的屠宰肉牛中四环素残留水平

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A cross-sectional study was conducted from October 2006 to May 2007 to estimate the proportionof tetracycline residue levels in beef at Addis Ababa, Debre Zeit and Nazareth slaughterhouses in centralEthiopia. A total of 384 muscle and kidney samples were randomly collected from slaughtered cattle in therespective slaughterhouses. The samples were qualitatively screened for tetracycline residues by thin layerchromatography (TLC) and presumptive positive samples were then further analyzed by using high performanceliquid chromatography (HPLC). A given sample was considered positive for tetracycline if its retention time andpeak corresponded to that of the standard. Out of the total 384 samples that we analyzed for tetracyclineresidues, 71.3% (274/384) had detectable oxytetracycline residues. Tetracycline and doxycycline residues werenot detected in any of the samples analysed. Among the meat samples collected from Addis Ababa, Debre Zeitand Nazareth slaughterhouses, 93.8%, 37.5% and 82.1% were positive for oxytetracycline. The mean (p>0.05)residue levels of oxytetracycline for the three slaughterhouses studied in muscle were as follows: Addis Ababa108.34μg/kg, Nazareth 64.85μg/kg and 15.916μg/kg at Debre Zeit while in kidney samples were (p<0.05): 99.02μg/kg in Addis Ababa, 109.35μg/kg in Nazareth and 112.53μg/kg in Debre Zeit slaughterhouses. Theoxytetracycline positive samples, which showed residues of oxytetracycline above maximum residue limits(100μg/kg) in muscle samples, were 58 (48.3%) at Addis Ababa slaughterhouse and 51 (48.1%) at Nazarethslaughterhouse and 1 (0.9%) in the kidney samples of Nazareth slaughterhouse. At Debre Zeit slaughterhouseno samples were above the maximum residue limits (MRL). The result of this study indicated thatoxytetracycline residues previously detected in thin layer chromatography were also detected in all samplesusing HPLC. About 48% of the edible tissues had oxytetracycline residue levels above the recommendedmaximum residue limits. This suggests that proper withdrawal periods were not respected before slaughter ofthe animals and indicate the need for regulatory authorities and producers to ensure the proper withdrawalperiods for the various antimicrobials administered to food animals before slaughter.
机译：2006年10月至2007年5月进行了一项横断面研究，以估计埃塞俄比亚中部亚的斯亚贝巴，德布勒日特和拿撒勒屠宰场牛肉中四环素残留量的比例。在各个屠宰场从屠宰的牛中随机收集了384份肌肉和肾脏样品。通过薄层色谱法（TLC）定性筛选样品中的四环素残留物，然后使用高效液相色谱（HPLC）对假定的阳性样品进行进一步分析。如果给定样品的保留时间和峰峰与标准品的保留时间和峰峰一致，则认为该样品为四环素阳性。在我们分析的总共384个四环素残留样品中，有71.3％（274/384）具有可检测的土霉素残留。在所分析的任何样品中均未检测到四环素和强力霉素残留。在从亚的斯亚贝巴，德布雷·泽伊特和拿撒勒屠宰场收集的肉类样品中，土霉素的阳性率为93.8％，37.5％和82.1％。在肌肉中研究的三个屠宰场的土霉素的平均（p> 0.05）残留水平如下：在德布雷特时代，亚的斯亚贝巴108.34μg/ kg，拿撒勒64.85μg/ kg和15.916μg/ kg（在肾脏样本中，（p < 0.05）：在亚的斯亚贝巴中为99.02μg/ kg，在拿撒勒中为109.35μg/ kg，在德布勒Zeit屠宰场中为112.53μg/ kg。土霉素在肌肉样本中的土霉素残留量超过最大残留限量（100μg/ kg），在亚的斯亚贝巴屠宰场为58（48.3％），在拿撒勒屠宰场为51（48.1％），在肾脏样品中为1（0.9％）拿撒勒屠宰场。 Debre Zeit屠宰场的样品没有超过最大残留限量（MRL）。这项研究的结果表明，以前在薄层色谱中检测到的土霉素残留也可以在所有使用HPLC的样品中检测到。约48％的可食用组织的土霉素残留水平超过建议的最大残留限量。这表明在宰杀动物之前没有遵守适当的撤药期，这表明监管部门和生产者需要确保在宰杀动物前对食用动物施用的各种抗菌药物有适当的撤药期。

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