Selenite Cystine Broth Base w/o Biselenite is recommended as a selective enrichment media for Salmonella and possibly Shigella sonnei from faeces, urine, water and foodtuffs. It is useful for detecting Salmonella in the nonacute stages of illness when organisms occur in the faeces in low numbers and for epidemiological studies to enhance the detection of low number of organisms from asymptomatic or convalescent patients.