Comparison of Pesticide and Veterinary Drug Residues in Yak Meat Samples from Different Producing Areas
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Abstract:
To assess the levels of pesticide and veterinary drug residues in meat obtained from naturally grazing yaks in Tibet and local beef in Guangzhou and objectively analyze and evaluate their nutritional values, different samples of meat produced in Guangzhou and Tibetan regions were analyzed. Using national standard methods, the levels of selected important antibiotics and pesticide residues were measured, accordingly establishing that levels of none of the evaluated indicators in the samples exceeded national standards. However, comparative analyses revealed that the pesticide and veterinary drug residues detected in yak samples from Tibet were significantly lower than those measured in local beef samples from Guangzhou. Moreover, the levels of pesticide residues in beef samples obtained from local, free-grazing cattle in Guangzhou were found to be consistent with those detected in Tibetan yak meat samples. Comparison of the aforementioned findings with data obtained using real-time fluorescence quantitative PCR revealed a high level of consistency (91.67%) between the detected levels of pesticide and veterinary drug residues and the authenticity of yak meat. These findings indicate that residue detection data can serve as a basis for verifying the authenticity of meat derived from naturally grazing yaks in Tibet. Additionally, in terms of food safety, it was established that while the nutritional value of Tibetan yak meat is significantly superior to that of standard locally farmed beef, it is comparable to that of beef obtained from local free-grazing cattle. These findings will thus provide a reference for the assessment of dietary nutrition and food safety for human consumption.
