Flare‐up reactions and desensitization from oral dosing in chromate‐sensitive guinea pigs

Abstract
Flare‐up reactions were induced in potassium dichromate hypersensitive guinea pigs by a single oral dose of 55 mg/kg. This dose is systemically toxic and higher than the dose required to induce the same reactions in humans. A total oral dose of potassium dichromate of 90‐115 mg/kg induced immunological unresponsiveness for at least 6 weeks. With limitations, the guinea pig model maybe helpful in screening the hyposensitization capacity of different haptens dosed orally.