Abstract
The carbohydrate fermentation test in cystine trypticase agar tubed medium was compared with a simple method using commercially available carbohydrate impregnated disks on culture inoculated Thayer-Martin medium with and without inhibitors (vancomycin, colistimethate, nystatin). There was 100% agreement the 2 methods when a limited sample of clinical [human] isolates of Neisseria gonorrhoeae and Nesseria meningitidis were tested.