photoallergy


Also found in: Dictionary, Wikipedia.

photoallergy

 [fo″to-al´er-je]
a delayed immunologic type of photosensitivity involving both a chemical substance to which the individual has become previously sensitized and radiant energy.

pho·to·sen·si·ti·za·tion

(fō'tō-sen-si-ti-zā'shŭn),
1. Sensitization of the skin to light, usually due to the action of certain drugs, plants, or other substances; may occur shortly after administration of the drug (phototoxic sensitivity), or may occur only after a latent period of from days to months (photoallergic sensitivity, or photoallergy).

photoallergy

/pho·to·al·ler·gy/ (-al´er-je) a delayed immunologic type of photosensitivity involving a chemical substance to which the individual has previously become sensitized, combined with radiant energy.photoaller´gic

photoallergy

[-al′ərjē]
Etymology: Gk, phos, light, allos, other + ergein, to work
a sensitivity to light that causes allergic reactions.

photoallergy

a hypersensitivity that develops against the photoproduct of an exogenous chemical.
References in periodicals archive ?
Phototoxicity can occur in anyone who has been exposed to photosensitizing drugs and light exposure, but photoallergy is limited to individuals who have been sensitized to a substance that is activated by light, Dr.
Photoallergy, however, presents as eczematous dermatitis and subjective pruritus and should be confirmed with photopatch testing, Dr.
Elidel did not induce contact sensitisation, phototoxicity or photoallergy, nor did it show any cumulative irritation.
These light sources are used for clinical testing, SPF sunscreen testing, photobiology research, phototoxicity evaluations, photoallergy studies, material testing and UV curing.
MAJOR SERVICES: Because of our 55 years of testing personal care products, Hill Top has unparalleled experience in cosmetic, antiperspirant, deodorant, sunscreen, aging skin, odor and malodor, periodontology, gingivitis & plaque, teeth whitening & stain, skin feel, skin irritation, skin sensitization, photoirritation, photoallergy, exaggerated use, consumer use/preference and bioinstrumentation testing.
Photoallergy is a relatively uncommon condition, when a drug causes an allergic reaction of the skin to sunlight.