Lateral flow assays (LFA) as an alternative medical diagnosis method for detection of virus species: The intertwine of nanotechnology with sensing strategies

• Published in: TrAC, Trends in analytical chemistry (Regular ed.) Trends in analytical chemistry (Regular ed.), 2021-12, Vol.145, p.116460-116460, Article 116460
• Main Authors: Sadeghi, Poorya, Sohrabi, Hessamaddin, Hejazi, Maryam, Jahanban-Esfahlan, Ali, Baradaran, Behzad, Tohidast, Maryam, Majidi, Mir Reza, Mokhtarzadeh, Ahad, Tavangar, Seyed Mohammad, de la Guardia, Miguel
• Format: Article
• Language: English
• Subjects: Dengue; HBV; HIV; Influenza; Lateral flow assays; Point of care testing; SARS-CoV-2; Viral infections; Zika
• ISSN: 0165-9936; 1879-3142
• DOI: 10.1016/j.trac.2021.116460

Viruses are responsible for multiple infections in humans that impose huge health burdens on individuals and populations worldwide. Therefore, numerous diagnostic methods and strategies have been developed for prevention, management, and decreasing the burden of viral diseases, each having its advantages and limitations. Viral infections are commonly detected using serological and nucleic acid-based methods. However, these conventional and clinical approaches have some limitations that can be resolved by implementing other detector devices. Therefore, the search for sensitive, selective, portable, and costless approaches as efficient alternative clinical methods for point of care testing (POCT) analysis has gained much attention in recent years. POCT is one of the ultimate goals in virus detection, and thus, the tests need to be rapid, specific, sensitive, accessible, and user-friendly. In this review, after a brief overview of viruses and their characteristics, the conventional viral detection methods, the clinical approaches, and their advantages and shortcomings are firstly explained. Then, LFA systems working principles, benefits, classification are discussed. Furthermore, the studies regarding designing and employing LFAs in diagnosing different types of viruses, especially SARS-CoV-2 as a main concern worldwide and innovations in the LFAs’ approaches and designs, are comprehensively discussed here. Furthermore, several strategies addressed in some studies for overcoming LFA limitations like low sensitivity are reviewed. Numerous techniques are adopted to increase sensitivity and perform quantitative detection. Employing several visualization methods, using different labeling reporters, integrating LFAs with other detection methods to benefit from both LFA and the integrated detection device advantages, and designing unique membranes to increase reagent reactivity, are some of the approaches that are highlighted. •Viruses impose huge health burdens on individuals worldwide.•Clinical approaches related to virus detection confirms their shortcomings.•LFAs are devices that can be used for POC testing of viruses.•Different labeling reporters use to increase sensitivity and quantitative detection.•LFAs with other methods benefit from both LFA and integrated device advantages.