The latest amendments to the "SLU" means make this media play a key role in preminal and basic differentiation that is required for screening of pathogenic forms of Enterobacteriaceae in practice the diagnosis of intestinal bacterial infections. In general all Enterobacteriaceae grown in this medium can lead to three types of changes according to their physiological properties: First, crops that produce blue shift without gas. Second, making a half turn to red and; third, they do not produce any modification or change except rare gas bubbles. In these three variations all Enterobacteriaceae are grouped, the first comprising at Proteus only; the sequndo to E. coli, E. freudii, Klebsiella and Aerobacter and; the third, to Groups: Salmonella, Arizona, Providence and Shigella. Differentiation of each group within each variation is done with the help of other tests already mentioned in the pr...