poison ivy dermatitis

dermatitis /der·ma·ti·tis/ (der″mah-ti´tis) pl. dermati´tides   inflammation of the skin.

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actinic dermatitis  dermatitis due to exposure to actinic radiation, such as that from the sun, ultraviolet waves, or x- or gamma radiation.

allergic dermatitis 

1. atopic d.

2. allergic contact d.

allergic contact dermatitis  contact dermatitis due to allergic sensitization.

ammonia dermatitis  diaper dermatitis attributed to skin irritation, due to the ammonia decomposition products of urine.

atopic dermatitis  a chronic inflammatory, pruritic, eczematous skin disorder in individuals with a hereditary predisposition to cutaneous pruritus; often accompanied by allergic rhinitis, hay fever, and asthma.

berlock dermatitis , berloque dermatitis dermatitis of the neck, face, or chest, with patches or streaks, caused by exposure to perfume or other toilet articles containing bergamot oil and then to sunlight.

cercarial dermatitis  swimmers' itch.

contact dermatitis  acute or chronic dermatitis caused by substances contacting the skin; it may involve allergic or nonallergic mechanisms.

diaper dermatitis  diaper rash.

dermatitis exfoliati´va neonato´rum  staphylococcal scalded skin syndrome.

exfoliative dermatitis  virtually universal erythema, desquamation, scaling, and itching of the skin, with loss of hair.

dermatitis herpetifor´mis  pruritic chronic dermatitis with successive groups of symmetrical, erythematous, papular, vesicular, eczematous, or bullous lesions, usually associated with asymptomatic gluten-sensitive enteropathy.

infectious eczematous dermatitis  a pustular eczematoid eruption arising from a primary lesion that is the source of an infectious exudate.

insect dermatitis  a transient skin eruption caused by the toxin-containing irritant hairs of insects such as certain moths and their caterpillars.

irritant dermatitis  a nonallergic type of contact dermatitis due to exposure to a substance that damages the skin.

livedoid dermatitis  local pain, swelling, livedoid changes, and increased temperature; due to temporary or prolonged local ischemia from vasculitis or from accidental arterial obliteration during intragluteal administration of medications.

meadow dermatitis , meadow-grass dermatitis phytophotodermatitis with eruption of vesicles and bullae in streaks or other configurations, caused by exposure to sunlight after contact with meadow grass.

photoallergic contact dermatitis , photocontact dermatitis allergic contact dermatitis caused by the action of sunlight on skin sensitized by contact with substances such as halogenated salicylanilides, sandalwood oil, or hexachlorophene.

phototoxic dermatitis  erythema followed by hyperpigmentation of sun-exposed areas of the skin, due to exposure to agents containing photosensitizing substances, such as coal tar and psoralen-containing perfumes, drugs, or plants, and then to sunlight.

poison ivy dermatitis , poison oak dermatitis, poison sumac dermatitis allergic contact dermatitis due to exposure to plants of the genus Rhus, which contain urushiol, a skin-sensitizing agent.

radiation dermatitis  radiodermatitis.

rat mite dermatitis  that due to a bite of the rat-mite, Ornithonyssus bacoti.

dermatitis re´pens  acrodermatitis continua.

rhus dermatitis  poison ivy, poison oak, or poison sumac d.

schistosome dermatitis  swimmer's itch.

seborrheic dermatitis , dermatitis seborrhe´ica chronic pruritic dermatitis with erythema, scaling, and yellow crust on areas such as the scalp, with exfoliation of excessive dandruff.

stasis dermatitis  chronic eczematous dermatitis due to venous insufficiency, initially on the inner aspect of the lower leg above the internal malleolus, sometimes spreading over the lower leg, marked by edema, pigmentation, and often ulceration.

swimmers' dermatitis  see under itch.

uncinarial dermatitis  ground itch.

x-ray dermatitis  radiodermatitis.

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poison ivy dermatitis

Etymology: L, potio, drink; ME, ivi + Gk, derma, skin, itis, inflammation

an allergic contact dermatitis caused by exposure to a nonvolatile oil, toxicodendrol, present in the leaves and other plant parts of poison ivy, a member of the Rhus toxicodendron species. Other Rhus species producing the same kind of contact dermatitis are poison oak and poison sumac. Also called rhus dermatitis.