Pentadecylcatechol, a component of poison ivy extract, is a potent contact sensitizer for guinea pigs when injected subcutaneously as an emulsion with mycobacteria (Freund's complete adjuvant) or by percutaneous application. Injection without mycobacteria or oral administration induces a state of immunologic unresponsiveness to contact sensitivity.

This content is only available via PDF.
Copyright, 1963, by The Williams & Wilkins Company
Copyright © 1963 by The American Association of Immunologists, Inc.
1963
The Williams & Wilkins Company