RT Journal Article SR Electronic T1 A simple biological method for detecting streptococcal nicotinamide adenine dinucleotide glycohydrolase. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 556 OP 559 DO 10.1136/jcp.32.6.556 VO 32 IS 6 A1 Green, N E YR 1979 UL http://jcp.bmj.com/content/32/6/556.abstract AB A biological method for detecting streptococcal nicotinamide adenine dinucleotide glycohydrolase (NADG) is presented, based on its ability to inhibit the growth of Haemophilus parainfluenzae. Three hundred clinical isolates of beta-haemolytic streptococci were tested. All isolates producing NADG belonged to Lancefield's group A, C, or G.