1
|
Ali MR, Bacchu MS, Das S, Akter S, Rahman MM, Saad Aly MA, Khan MZH. Label free flexible electrochemical DNA biosensor for selective detection of Shigella flexneri in real food samples. Talanta 2023; 253:123909. [PMID: 36152607 DOI: 10.1016/j.talanta.2022.123909] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 08/26/2022] [Accepted: 08/30/2022] [Indexed: 12/13/2022]
Abstract
An effective tool for early-stage selective detection of the foodborne bacterial pathogen Shigella flexneri (S. flexneri) is essential for diagnosing infectious diseases and controlling outbreaks. Here, a label-free electrochemical DNA biosensor for monitoring S. flexneri is developed. To fabricate the biosensor, detection probe (capture probe) is immobilized on the surface of poly melamine (P-Mel) and poly glutamic acid (PGA), and disuccinimidyl suberate (DSS) functionalized flexible indium tin oxide (ITO) electrode. Anthraquinone-2-sulfonic acid monohydrate sodium salt (AQMS) is used as a signal indicator for the detection of S. flexneri. The proposed DNA biosensor exhibits a wide dynamic range with concentration of the targets ranging from 1 × 10-6 to 1 × 10-21 molL-1 with a limit of detection (LOD) of 7.4 × 10-22 molL-1 in the complementary linear target of S. flexneri, and a detection range of 8 × 1010-80 cells/ml with a LOD of 10 cells/ml in real S. flexneri sample. The proposed flexible biosensor provides high specificity for the detection of S. flexneri compared to other target signals such as discrete base mismatches and different bacterial species. The developed biosensor displayed excellent recoveries in detecting S. flexneri in spiked food samples. Therefore, the proposed biosensor can serve as a model methodology for the detection of other pathogens in a broad span of industries.
Collapse
Affiliation(s)
- M R Ali
- Dept. of Chemical Engineering, Jashore University of Science and Technology, Jashore, 7408, Bangladesh; Laboratory of Nano-bio and Advanced Materials Engineering (NAME), Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | - M S Bacchu
- Dept. of Chemical Engineering, Jashore University of Science and Technology, Jashore, 7408, Bangladesh; Laboratory of Nano-bio and Advanced Materials Engineering (NAME), Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | - S Das
- Dept. of Microbiology, Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | - S Akter
- Dept. of Microbiology, Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | - M M Rahman
- Faculty of Science and Information Technology, Daffodil International University, Dhaka, 1207, Bangladesh
| | - M Aly Saad Aly
- Department of New Biology, Daegu Gyeongbuk Institute of Science & Technology (DGIST), 333 Techno Jungang-daero, Daegu, 42988, South Korea
| | - M Z H Khan
- Dept. of Chemical Engineering, Jashore University of Science and Technology, Jashore, 7408, Bangladesh; Laboratory of Nano-bio and Advanced Materials Engineering (NAME), Jashore University of Science and Technology, Jashore, 7408, Bangladesh.
| |
Collapse
|
2
|
Emergence of azithromycin and third-generation cephalosporins resistant Shigella isolated from Iranian children. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2021.101485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|