Method for the distinction of gramnegative from grampositive bacteria

Abstract

A test method is described for the distinction of gramnegative from grampositive bacteria. Gramnegative bacteria are aminopeptidase positive and can be detected by a colour reaction. The test can be performed: a. by laying L-alanine-4-nitroanilide-impregnated materials upon bacterial colonies b. by streaking bacteria upon the impregnated test materials c. by adding the bacteria to the test solutions, for example in microtiter plates. © 1976 Springer-Verlag.