Skin Reactions with Bacterial Filtrates of Anhemolytic Streptococcus, Hemolytic Streptococcus and B. Typhosus

Skin tests have been used for the study of the factors involved in the reaction, for the identification and classification of bacteria, for the etiological cause of infections, and especially for the detection of susceptibility or immunity to certain diseases. While other intradermal reactions have not as yet yielded the highly specific results obtained by the Schick and Dick tests, nevertheless many suggestive and interesting findings have resulted from the use of other bacterial filtrates, a few of which are cited.