RT Journal Article SR Electronic(1) A1 Devaraj, S. K. A1 Zinnemann, K.YR 1969 T1 Nalidixic Acid (Negram) Disc Technique for the Rapid Isolation of Faecal Streptococci from Mixed Flora JF Journal of Medical Microbiology, VO 2 IS 3 SP 366 OP 368 DO https://doi.org/10.1099/00222615-2-3-366 PB Microbiology Society, SN 1473-5644, AB SUMMARY Over 98 per cent. of 200 faecal streptococcus strains isolated from mixed flora, mainly in specimens of urine but also in pus, peritoneal and wound swabs were resistant to 30 μg of nalidixic acid. Placing filter paper discs containing 30 μg of nalidixic acid on primary plates inoculated with mixed flora is a reliable and simple method of isolating faecal streptococci from specimens containing a large admixture of Gram-negative bacilli., UL https://www.microbiologyresearch.org/content/journal/jmm/10.1099/00222615-2-3-366