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The Specific Toxigenic Properties of Haemolytic Streptococci from Scarlatina and other Sources
Published online by Cambridge University Press: 15 May 2009
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1. Without exception, ninety-eight strains of haemolytic streptococci isolated from scarlet fever cases have been found to produce a toxic principle which in high dilutions is capable of evoking a cutaneous reaction in sus ceptible persons.
2. A certain proportion of haemolytic streptococci from other sources possess a similar toxigenic property. In the majority of such cases this property is only weakly developed as judged by quantitative tests. In a few instances a “toxin” is produced which is equally active with that of scarlatina strains.
3. Certain non-scarlatina strains produce “toxins” which evoke a cutane ous reaction both in known positive reactors and also in persons who do not react to a standard toxin from a scarlatina strain.
4. In the majority of cases the toxins produced by scarlatina strains are neutralised by the scarlatina antitoxic sera at present being used for therapeutic purposes, but a certain proportion of such toxins are not in the neutralised
5. The “toxins”produced by non-scaralation strains are in the majority of cases neutralised by the antitoxic sera.
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- Copyright © Cambridge University Press 1927
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