Abstract
Summary
Delayed skin reactivity has been induced in guinea pigs to soluble extracts of toxoplasmata grown in a stable line of monkey kidney tissues and combined with complete Freund's adjuvant. Sensitized guinea pigs exhibited intense delayed reactions to toxoplasmins derived from either infected mice or embryonated eggs. The possible use of this procedure for determining the potency of toxoplasmins of heterogeneous sources has been discussed.
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