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Spectra of bacterial colonies. Note: E. coli, SA and SE are abbreviations of Escherichia coli, Staphylococcus aureus and Salmonella, respectively; LA, PA and TSA are abbreviations of Luria–Bertani agar, plate counting agar and tryptone soy agar, respectively. For example, E. coli LA represents the Escherichia coli cultured on Luria–Bertani agar.
