THE DICK TEST AND ACTIVE IMMUNIZATION WITH SCARLET FEVER STREPTOCOCCUS TOXIN

Some Experiments with Hæmolytic Streptococcus Toxin of Varying Origin in Connection with the "Dick" Test for Scarlet Fever.

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...

The Routine Preparation of Scarlet-fever Toxin of High Value

A NUMBER of attempts have been made in recent years to improve the quality of scarlet fever toxin, of which the most noteworthy is that of Hooker et al. (1933), who by a special technique obtained toxin with a value of 500,000 skin test doses per c.c. For some time past, however, the routine toxins prepared in this laboratory have been of considerably greater potency than those described by the...

The pyrogenic effect of scarlet fever toxin. IV. Pyrogenicity of strain C 203 U filtrate: comparison with some basic characteristics of the known types of scarlet fever toxin.

The pyrogenic activity of scarlet fever toxin has been described a number of times. The "classic" toxin, prepared from the Dochez NY 5 strain, was found to have a double specificity, designed by Hooker and Follensby as "A" and "B".1 More recently, Watson has analyzed the antigenic components of this toxin and found a third type, which he has denoted "C"1.2 In working with a mutant strain of str...

Active and Passive Immunization in Typhus Fever.

Inspection of the paleontologic history of many phyla shows that when certain members of a series of polyisomeres have been subjected to in-. creasing stresses through long periods of geologic time, they have often become enlarged, strengthened or fused with their neighbors and have thereby passed into a state of anisomerism. Thus taxonomy, paleontology, comparative anatomy, genetics, experimen...