*Review* **Progress in Fluorescence Biosensing and Food Safety towards Point-of-Detection (PoD) System**

**Saloni Kakkar 1,2,†, Payal Gupta 2,†, Navin Kumar 2,\* and Krishna Kant 3,\***


**Abstract:** The detection of pathogens in food substances is of crucial concern for public health and for the safety of the natural environment. Nanomaterials, with their high sensitivity and selectivity have an edge over conventional organic dyes in fluorescent-based detection methods. Advances in microfluidic technology in biosensors have taken place to meet the user criteria of sensitive, inexpensive, user-friendly, and quick detection. In this review, we have summarized the use of fluorescence-based nanomaterials and the latest research approaches towards integrated biosensors, including microsystems containing fluorescence-based detection, various model systems with nano materials, DNA probes, and antibodies. Paper-based lateral-flow test strips and microchips as well as the most-used trapping components are also reviewed, and the possibility of their performance in portable devices evaluated. We also present a current market-available portable system which was developed for food screening and highlight the future direction for the development of fluorescencebased systems for on-site detection and stratification of common foodborne pathogens.

**Keywords:** food pathogen; microfluidic; biosensing; fluorescence microscopy; PoC device
