Some particular cell components of intact Bacillus cereus could be detected and identified by Fourier transform infrared spectroscopy (FTIR). FTIR were collected directly, then the FTIR spectra of the samples were converted into second derivative spectra. Typical marker bands were used to identify these bacterial cell components such as capsules, endospores or storage materials. Capsules were detected in cell by a strong amide band near 1654 cm-1 typical for α-helical structures and by strong car-boxy late stretching vibrations(≃1601 cm-1 and...