Abstract
A survey of the microbiological quality of tofu was carried out in the summer and autumn of 1983. A total of 154 samples were examined. About 95% of the samples had an aerobic plate count above 10 6 CFU/g, numbers of Enterobacteriaceae exceeded 10 3 CFU/g in 86% of the samples and numbers of lactic acid bacteria exceeded 10 4 CFU/g in 94% of the samples. Bacillus cereus was found in one sample and Staphylococcus aureus in another, at levels above 10 5 CFU/g. Salmonella was not found in 25 g. 36% of the samples contained > 10 2 CFU/g Escherichia coli and Yersinia enterocolitica were detected in 11% of the samples (present in 0.2 g). The reasons for this poor microbiological quality are discussed and some recommendations made.
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