Sensors, Vol. 20, Pages 813: Immunosensor Based on Long-Period Fiber Gratings for Detection of Viruses Causing Gastroenteritis

Sensors, Vol. 20, Pages 813: Immunosensor Based on Long-Period Fiber Gratings for Detection of Viruses Causing Gastroenteritis Sensors doi: 10.3390/s20030813 Authors: Marta Janczuk-Richter Beata Gromadzka Łukasz Richter Mirosława Panasiuk Karolina Zimmer Predrag Mikulic Wojtek J. Bock Sebastian Maćkowski Mateusz Śmietana Joanna Niedziółka Jönsson Since the norovirus is the main cause of acute gastroenteritis all over the world, its fast detection is crucial in medical diagnostics. In this work, a rapid, sensitive, and selective optical fiber biosensor for the detection of norovirus virus-like particles (VLPs) is reported. The sensor is based on highly sensitive long-period fiber gratings (LPFGs) coated with antibodies against the main coat protein of the norovirus. Several modification methods were verified to obtain reliable immobilization of protein receptors on the LPFG surface. We were able to detect 1 ng/mL norovirus VLPs in a 40-min assay in a label-free manner. Thanks to the application of an optical fiber as the sensor, there is a possibility to increase the user’s safety by separating the measurement point from the signal processing setup. Moreover, our sensor is small and light, and the proposed assay is straightforward. The designed LPFG-based biosensor could be applied in both fast norovirus detection and in vaccine testing.
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research