Abstract: Enterobacter aerogenes and Enterobacter cloacae, as the major cadaverine- and putrescine-producing bacteria, are often isolated simultaneously in the fermented sausages. In this study, E. aerogenes and E. cloacae were inoculated in medium with different proportions during the culture course of 48 h. E. aerogenes revealed strong ability to produce cadaverine, and E. cloacae exhibited a relatively strong ability to produce putrescine. Cadaverine levels exhibited significant changes between the mixed inoculation and the two pure cultures; Two bacteria also had a weak cross-interaction on the production of putrescine.

Key words: Enterobacter aerogenes, Enterobacter cloacae, cadaverine, putrescine