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

To evaluate associative growth of psychorotrophic P. aeruginosa and S. aureus with Y. enterocolitica 0:3, 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 0:3, P. aeruginosa and S. aureus, shows the stimulating effects of Y. enterocolitica 0:3 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

Sobrevivência de Yersinia enterocolitica em diversos sistemas aquáticos experimentais / Survical of yersinia enterocolitica in different experimental aquatic systems

Amostras de Yersinia enterocolitica foram capazes de sobreviver em diversas coleçöes aquáticas por períodos de até 30 dias. Os resultados destes experimentos, realizados "in vitro", sugerem que redutos aquáticos possam atuar na perpetuaçäo de Yersinia enterocolitica em ambientes naturais, além de servir como fonte de infecçäo para humanos e animais