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Antibiotic residues in food represent a significant public health concern, particularly when associated with compounds known to pose toxicological risks. The nitrofuran class of broad-spectrum antibiotics, including furaltadone, furazolidone, nitrofurantoin, and nitrofurazone, has historically been used in food-producing animals to treat bacterial infections and improve productivity. However, due to evidence of potential carcinogenicity and other harmful effects, their use has been banned in many regions, including the United States, Canada, and the European Union. These regulations also extend to imported foods, where zero tolerance for nitrofuran residues is enforced.

Monitoring of food products such as meat, as well as environmental sources like water, is essential to ensure that these prohibited substances are not misused and do not enter the food chain. Effective surveillance helps protect both human and animal health while ensuring compliance with international food safety standards.

One of the main challenges in detecting nitrofurans is that the parent compounds are rapidly metabolised after administration and are rarely found in their original form. Instead, they are converted into stable, protein-bound metabolites that persist in edible tissues for extended periods.

Among these, AMOZ (3-amino-5-morpholino-methyl-2-oxazolidinone), a metabolite derived from furaltadone, is particularly important for monitoring. Unlike the parent drug, AMOZ remains stable and is not destroyed by standard cooking processes. It can also be released from tissue under mildly acidic conditions, making it a reliable marker for detecting previous nitrofuran use.

The identification and quantification of such metabolites are therefore critical components of residue testing programmes, supporting regulatory compliance, food safety assurance, and consumer protection.