Assessment of the effects of sulfate and nitrate on the temporal evolution of Klebsiella oxytoca and Staphylococcus aureus abundance under shaking conditions, in aquatic microcosm

Most chemicals in natural aquatic media can be assimilated by bacteria. The impact of various environmental conditions on this microbial process is not always clear. This study aimed at investigating changes in the abundance of Klebsiella oxytoca and Staphylococcus aureus under different shaking conditions, in aquatic microcosms containing nitrate and sulfate. Sodium chloride solution and nitrate and sulfate solutions containing bacteria were supplemented with tryptic peptone. The solutions were incubated under shaking conditions Bacteriological analyses were performed hourly over a 6-h period. During the first 3 h of incubation, results showed that the highest values of the apparent cell growth rates in pure culturesOriginal Abstract: L'impact de diverses conditions environnementales sur l'assimilation bacterienne dans l'eau, des composes chimiques est peu connu. La presente etude a vise l'evaluation de la dynamique d'abondance de Klebsiella oxytoca et Staphylococcus aureus sous diverses conditions, en milieu aquatique microcosme contenant du sulfate ou nitrate.