Table 4.
Label-free and label-based strategies for bacterial contaminations detection by Raman/SERS in food.
| Strategies | Recognition Elements | Algorithms | SERS Substrates | Bacteria Species | Ref. |
|---|---|---|---|---|---|
| Spore | Dipicolinic acid | — | Gold nanoparticle-based substrates | Bacillus anthracis | [38] |
| Label-based method | Complementary DNAs | — | Au nanopillars | Enterococcus faecium and Staphylococcus aureus | [41] |
| Aptamers | — | Dendritic porous silica nanoparticles-Au-MBA-aptamer | Staphylococcus aureus | [42] | |
| Label-free method | — | Principal component analysis (PCA) | Au NPs | Seven foodborne bacteria (Salmonella typhimurium ATCC 50013, Salmonella O7HZ10, Shigella boydii CMCC51514, Shigella sonnei CMCC51529, Shigella dysenteriae CMCC51252, Citrobacter freundii ATCC43864, Enterobacter sakazakii 154) |
[37] |
| — | — | AgNPs | E. coli DSM 1116 | [39] | |
| — | PCA | Ag/Si substrate | C. Jejuni NCTC 11351, C. coli ATCC 33559, C. upsaliensis ATCC 43954, C. lari ATCC BAA-1060, P. aeruginosa ATCC 27853 |
[40] |
—: Not report.