Associative growth of Yersinia enterocolitica 0:3 with Pseudomonas aeruginosa and Staphylococcus aureus in a diffusion apparatus (Ecologen)

RESUMO

To evaluate associative growth of psychorotrophic P. aeruginosa and S. aureus with Y. enterocolitica 03, microorganisms were grow in trypticase soy broth in a diffusion apparatus (Ecologen) and incubated for 9 days at 4 grados C. The effects of culture interactions were determined by growth curves, lag times, generation times, pH changes and acid production. The observed growth curves for Y. enterocolitica 03, P. aeruginosa and S. aureus, shows the stimulating effects of Y. enterocolitica 03 on growth of psychrotrophic microorganisms in associative culture at 4 grados C, although it was later inhibited by these organisms as they reached the stationary phase, thus proving itself to be a poor competitor with common spoilage microorganism