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Isolation and Identification of Bacillus from Spontaneous Fermented Sufu

Sufu is a traditional Chinese fermented food. The safety of spontaneous fermentation products has been concerned by more and more people. A total of four isolates with big clear halos on the casein medium plate were isolated from spontaneous fermented Sufu in southern Sichuan. A1 and A3 most likely belong to Bacillus cereus B according to their phenotype and Biolog Microbial Identification System. B2 was classified in group as Bacillus amyloliquefaciens B with the same methods. A2 was identified as Bacillus subtilis according to their phenotype and 16SrRNA. The safety of the strains are also discussed.