Abstract
Minute amounts of aqueousether extracted S. enteritidis endotoxin, upon intravenous injection into rabbits, alter dermal reactivity to intradermally injected epinephrine. The lipid A component is only approximately 1/2000 as active as the endotoxin when potent endotoxins are tested. Phenol-water treatment of aqueous-ether extracted endotoxin reduces this activity.

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