Dictionary of Allergies .. Delayed allergy

Delayed allergy

An allergic response which appears hours or days after application or absorption of an allergen; it includes contact dermatitis and bacterial allergy. True allergic reactions to iodinated radiocontrast media are rare, and only a few well-documented cases of delayed-type hypersensitivity reactions caused by contrast media have been described [1]..
 

References

Courvoisier S, Bircher AJ. Delayed-type hypersensitivity to a nonionic, radiopaque contrast medium. Allergy. 1998 Dec;53(12):1221-4