Fluoroquinolones are a class of potent antibacterial agents which are widely used in the prevention and treatment of animal diseases in the animal husbandry and aquaculture industries. However, with the occurrence of irregular medication, the problem of veterinary drug residues in foods has become increasingly prominent. Therefore, developing fast, convenient and efficient detection methods for fluoroquinolone residues is of great significance to ensure food safety. This article reviews the application of fluorescence analysis in the detection of fluoroquinolone residues in foods, highlighting its excellent detection performance, and it also presents an outlook on fluorescence methods for the analysis of fluoroquinolone residues in foods. We expect that this review will provide a reference for the detection of fluoroquinolone residues in foods.

The contamination of foodborne pathogenic bacteria poses great threats to human health. Conventional foodborne pathogen detection methods suffer from the shortcomings of time-consuming, cumbersome, and non-real time. Hence, it is of great significance to explore a sensitive, safe, simple and economical method for foodborne pathogen detection. Compared with the traditional methods, nano-biosensor-based detection assays possess merits such as exceptional sensitivity, high selectivity, real-time detection, low consumption and low limit of detection. In this article, these nano-biosensor-based methods are summarized, and the principles and advantages of single-, dual- and multi-mode detection are comprehensively discussed. Meanwhile, an outlook on the application of nano-biosensors for the detection of foodborne pathogens is given with the goal of providing a reference for the optimization of the existing detection methods for foodborne pathogenic bacteria.