Rapid identification of foodborne pathogens Streptococcus spp. by surface-enhanced Raman spectroscopies(SERS) was studied. Gold sol was prepared by tri-sodium citrate,and mixed with Streptococcus spp. the SERS signals were collected. First,methods of activation,pre-culturing combinations and the preparation of the colony of Streptococcus agalactia were determined,then the identification of Streptococcus genus from other common pathogenic bacteria of Gram-positive was done by cluster analysis(HCA) and princi...