Abstract
In this study, the analytical performance of bacteriophages for Salmonella Enteritidis was investigated using lateral flow assay (LFA) technique. The analytical performance characteristics of bacteriophages were compared with antibodies which are regularly used as analyte-specific agents in the lateral flow immunoassay test strip. Bacteriophages could be an alternative analyte-specific agents to antibodies in lateral flow assay testing of bacteria since they offer comparable sensitivity, specificity, and accuracy. In the present study, Surface Enhanced Raman Spectroscopy (SERS) and colorimetric measurements were combined in one platform and sensitive quantitation of target bacteria was accomplished with a total quantitative analysis time of less than 30 min. The developed Salmonella Enteritidis F5-4 phage-based LFA specifically responds to Salmonella Enteritidis, while lower SERS responses to different bacteria types including Bacillus subtilis, Micrococcus luteus, Escherichia coli, Salmonella Typhimurium were observed. The developed test strips were also applied for the determination of Salmonella Enteritidis in spiked chicken and egg samples.
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