The Nature and Significance of Pseudo-Dick Reactions

[摘要] 1. 1. Filtrates of cultures of hemolytic streptococcus contain very little streptococcal protein, and the hypothesis, which considers such protein a frequent source of pseudo-Dick reactions, appears untenable.2. 2. The activity of filtrate of a non-scarlatinal streptococcus in the skin did not appear to depend on cellular disintegration, and differed in its great heat-stability and in other respects from that of preparations of streptococcal protein.3. 3. No agent could be found, other than scarlatinal toxin, which had the potency necessary to induce reactions to 1 or 2 STD of the scarlatinal filtrates used.4. 4. On the whole, these results tend to suggest that, at least in the age-group studied, pseudo-Dick reactions to serum-free filtrate are unusual, and controls heated for two hours at 100° should be of value in detecting them when they occur.

[学科分类] 生物科学（综合）