Abstract: To ascertain dominant microorganisms in konjac dietary fiber solid drinks, and analysis the reason for the bacteria existence, the bacteria in the product as well as in the production environment were isolated and identified. The results showed that 32 strains of bacteria were found in six batches of samples, including 27 strains gram positive bacillus, 2 strains of gram positive long coli bacillus, 2 strains of moulds, 1 strain of gram-negative bacillus, no enterobacteriaceae, lactic acid bacteria and staphylococcus. Through the investigation of background bacteria in the production environment, 200 strains of microorganisms were isolated from the atmosphere, including 103 strains bacillus. Among them, 9 bacillus were isolated from the contact surface of drying workshop. Results indicated that bacillus was the dominant microorganisms of konjac dietary fiber solid drinks. There is a certain correlation with the production process and the production environment.

Key words: konjac dietary fiber solid drinks, microflora, dominant bacteria, background bacteria