The Dick Test in relation to the presence of the Streptococcus Haemolyticus in the Throats of Individuals not suffering from Scarlet Fever.

It was resolved, therefore, to ascertain whether S. hIrnolyticus could be found in the throat cultures of those who were )ick positive, and further to determine whether the various strains could be separated into scarlatinal and non-scarlatinal types. As it has already been shown (Smith, 1926, 1927, Griffith, 1926, James, 1926) that scarlatinal types cannot be distinguished by agglutination and agglutinin-absorption tests from strains of hxemolvtic streptococci occurring in other infections, the various strains were tested for their power to produce a true exotoxin, and tests were muade to determine if the exotoxins were neutralised by scarlatinal horse-antitoxin.