Experimental study on the growth of Salmonella and coli-aerogenes bacteria in pure and mixed cultures,in a fermentor,in two different enrichment media: Sodium selenite and tetrathionate broth

Summary Different serotypes of Salmonella and coli-aerogenes bacteria were grown in a fermentor at +43°C. The Culture media used were composed of two different nutrient broths, one supplemented with sodium selenite, the other with potassium tetrathionate. The growth of both bacteria and the following types of mixed bacteria was studied: Escherichia coli-Salmonella brancaster and Klebsiella pneumoniae-Salmonella brancaster. During the first 10 h of incubation, sodium tetrathionate broth inhibited the multiplication of coli-aerogenes bacteria. Similar results were obtained when these bacteria were grown with S. brancaster and incubated for 18 h, regardless of the original concentration of each of the bacteria. In the presence of sodium selenite, after 18 h of incubation growth was inhibited in E. coli, but not in the other coli-aerogenes bacteria.