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Updated! List of allergens, sensitizers, tests.
Compounds that increase the rate of a chemical reaction;  allergens are carbamates, mercaptobenzothiazoles, thiuram mix
airborne contact allergens
Most common; burning poison ivy, oak, or sumac, pollen, ragweed
allergans, most common
balsam of Peru, benzocaine, cosmetics, ethylenediamine hydrochloride, mercurochrome, mercaptobenzothiazole, neomycin, nickel, perfumes, poison ivy, poison oak, potassium dichromate, thimerosal
allyl disulfideallergen in garlic & onion
alpha amyl cinnamic alcoholComponent of fragrance mix; allergen in T.R.U.E. test.
ammoniated mercury
Formerly used as antibacterial; now used in patch tests for mercury sensitivity.
ammonium persulfate
Cause of contact urticaria; in hair bleaches.
antibiotic allergy
Most commonly; neomycin, penicillin, streptomycin
antibiotic patch-test series
ampicillin 5% aq., bacitracin 20% in pet., chloramphenicol 5% in pet., clindamycin 1% aq., erythromycin 5% in pet., furacin 0.2% in pet., garamycin 20% in pet., lincomycin 1% aq., mafenide 5% in pet., neomycin 20% in pet. nystatin 100,000 units/mL in alcohol, penicillin 100,000 units/ml, polymxin B 3% in pet., sodium fusidate 2% in pet., streptomycin 2.5% aq. sol., sulfanilamide 5% in pet., tetracycline 5% in pet., tetracycline 5% in pet., tobramycin 20% in pet.
antioxidant allergenparaphenylendiamine
Asiatic pills, DeValagin’s solution, Donovan’s solution (arsenic triiodide), Fowler’s solution (arsenious acid)
In fragrances.  One of main allergens in oak moss absolute.
balsam of Peru
Complex organic compound resin from Myroxolon balsamum, a tree native to El Salvador.  Found in dental agents, fixatives, flavoring of drinks and tobacco, fragrances, topical medications.  Cross reacts with balsam of Tolu, benzoates, cinnamates, colophony, styrax, tincture of benzoin.  Allergic reaction results from benzoic esters, cinnamic esters, and vannilin.  Photosensitizer.  Allergen in T.R.U.E. test.
balsam of Tolu
Resin from Myroxylon toluifera, a tree native to northern South America used medicinally.  Allergic reaction to organic compounds; benzoic esters, cinnamic esters, and vannilin.  A close relative (cross-reacts) with balsam of Peru.
benzoate diet drinks, Dr. Pepper, Mello Yello, Mountain Dew, packaged foods
In sunscreens
Butyl hydroxyanisole, butyl methoxy phenol; antioxidant used in fats and oils, food packaging, medication preservative.
Butyl hydroxytoluene; common preservative; antioxidant in food products, animal feed, plastic, rubber, jet fuel.
bisphenol Asee epoxy resin
black jack dermatitis
chromate allergy (on elbows & forearms) from green felt blackjack table
black-rubber mix
In rubber; may cross react with hair dyes (phenylenediamine).  Found in boot, cane tip, eyeglass holder, glove (black rubber), knee-high stocking rubber ring, money counter, scuba mask, shoe, squash ball, tire, truncheon, underwear elastic, wind surfing board
Preservative in barrier creams, coolants, cosmetics, hair preparations, industrial hand cleaners, shampoo.
budesonidea glucocorticoid
caine mix
Combination of benzocaine, dibucaine hydochloride, and tetracaine hydrochloride.  Used in dentistry and topical anti-itch, anti-pain  medications; increased chance of sensitization due to use in inflamed skin.  In cough syrups and hemorrhoidal preparations.  Allergen in T.R.U.E. test.
carba mix
Used as accelerator in pesticides, rubber, rubber glues, vinyl.  1,3-diphenylguanidine, diethydithiocarbamate, dibutyldithiocarbamate (natural rubber latex in shoes)
cashewcashew nut shells contain a phenolic resin (anacardic acid) that is an allergen
cement dermatitis
cobalt, dichromate, nickel
chelitis, allergic
carrots, coffee, menthol, orange peel
chlorhexidine digluconate
Antimicobial in cosmetics, dentistry, pharmaceuticals, surgical scrubs, toothpaste.  Photosensitizer.
p-Chloro-m-cresolAntimicrobial (esp. antifungal) in baby products, coolants, pharmaceuticals, shampoos, topical antiseptics
p-Chloro-m-xylenolCommon antimicrobial in cosmetics, coolants, deoderant soaps, hair conditioner, protective creams
chromateIn bleaches, cement, chromic catgut, chrome-tanned shoes, detergents, hide glue, match heads
cinnamic alcohol
Used in cosmetics, flavorings, perfumes (lilac scent), soaps.  A component of balsam of Peru.  Component of fragrance mix; allergen in T.R.U.E. test.
cinnamic aldehydeCause of contact urticaria and 'systemic' contact dermatitis.  Found in flavorings (cassia oil), food, gum, mouthwash, pungent perfumes, soap.  Component of fragrance mix; allergen in T.R.U.E. test.
cobalt dichlorideIn cement, metal, metal-plated objects, paint.  Co-reactive (but not cross reactive) with nickel.  Allergen in T.R.U.E. test.
cocamidopropyl betaineamphoteric surfactant; allergen in cosmetics such as shampoos, bath gels
AKA rosin.  Used by baseball batters, bowlers, violinists.  In adhesives, cosmetics, lacquers, paper, soldering flux, varnishes.
Compositae family
see sesquiterpene lactone containing plants
corticosteroid classes, based on cross-reactivity
Class A: hydrocortisone, hydrocortisone with C17 or C21 acetate ester, methylprednisolone +/- acetate, prednisone, prednisolone +/- acetate, tixocortol pivalate
Class B: amcinonide, budesonide, desonide, flucinonide, fluocinolone acetonide, halcinonide, triamcinolone
Class C: betamethasone (not valerate), betamethasone & disodium phosphate, desoxymethasone, dexamethasone & disodium phosphate, flucortolone
Class D: aclomethasone dipropionate, betamethasone valerate & dipropionate, clobetasol propionate & butyrate, fluocortolone hexanoate & pivalate, hydrocortisone-17 butyrate, hydrocortisone butyrate & valerate, prenicarbate
corticosteroids, paraben-free
Dermolate anti-itch cream, Dermolate scalp itch lotion, Hytone cream, Rhulicort cream & lotion
cosmetic ingredients
fragrance, lanolin, Quaternium 15
cross-reactionsee sensitizers and corticosteroid classes
diazolidinyl urea (Germall II)Common preservative in cosmetics, creams, hair products, lotions, shampoo
dimethyglyoxime (1%)
A test for presence of nickel; drops added to unknown metal--red precipitate indicates >1:10,000 concentration.
DMDM hydantoinA preservative that is a formaldehyde donor; in cosmetics, hair conditioners, shampoos, skin care products, soaps.
douche sensitizers
benzethonium chloride, eucalyptus oil, methyl salicylate, oxyquinoline, perfumes, phenylmercuric acetate, thymol
eczema, delayed & urticaria
see urticaria & delayed eczema
eczematous contact dermatitis
Common causes: alcohol, balsam of Peru, benzoic acid, cinnamic acid, cinnamic aldehyde, cobalt chloride, sodium benzoate, sorbic acid
elderly, common sensitizers
dichromates, nickel, paraphenylenediamine, poison ivy, poison oak, poison sumac, ragweed, rubber
epichlorhydrinsee epoxy resin
epoxy resinAllergen in T.R.U.E. test.  Based on bisphenol A and epichlorhydrin.  Sensitizes only when incompletely cured.
ester anestheticsCross react with azo dyes, PABA, paraphenylenediamine, sulfonamides
ethylenediamine dihydrochloride
Emulsifier and stabilizer.  Contained in anticorrosion agents, asphalt, eyedrops, fungicides, hair dyes, insecticides, plastic curing agents, resins, rubber, solvents, topical medications, waxes.  Cross reacts with aminophylline, hydroxyzine, meclizine.  Allergen in T.R.U.E. test.
Common in essential oils (clove oil), flavorings (clove), medications (asthma inhalants), perfumes (carnation).  Used in dentistry as topical antiseptic.  Component of fragrance mix; allergen in T.R.U.E. test.
eyeglass frame dermatitis
azo dyes, beeswax-turpentine mixture, butyl acrylate, cellulose acetate, cellulose propionate, epoxy resin, ethyl acetate, ethylene blycol, ethylene oxide, nickel, p-tert-butylphenol, phenyl salicylate, resorcinol monobenzoate, tricresyl phosphate, triphenyl phosphate
eyelid dermatitis
cosmetics, nail polish (toluene sulfonamide/formaldehyde resin)
formaldehydeReleased by quaternium 15 and occasionaly by imidazolidinyl urea.  In adhesives, glues, plastics, resin for clothing.
apparel: anti-wrinkle, anti-static, chamois, chlorine resistant, mildew resistant, moth-proof finish, permanent press, screen prints, suede, wash & wear, waterproof finish
cements & pastes
cleaning fluids, dry cleaning
cosmetics: bath oil, bubble bath, fingernail polish, shampoo, wave sets, fixatives
embalming fluid
medications: anhidrotics, contraceptives, denatured alcohol, methenamine, mouthwashes, orthopedic casts, renal dialysis, tanning agents, wart removers
paints, polishes, preservatives
phenolic resins & urea plastics (buttons, jewelry, adhesives, footwear)
photographic plates and chemicals
smoke from burning charcoal, cigarettes, cigars, coal, wood
toxoids & vaccines
formaldehyde-releasing preservatives2-bromo-2-nitropropane-1,3-diol, diazolidinyl urea (Germall II), 1,2-dibromo-2,4-dicyanobutane, DMDM hydantoin, imidazolidinyl urea (Germall 115), quaternium-15 (Dowicil 200)
fragrance mix
Most common cosmetic allergy.  In T.R.U.E. test. Contains alpha amyl cinnamic alcohol, cinnamic aldeyde, cinnamic alcohol, oak moss absolute, hydroxycitronellal, eugenol, isoeugenol, geraniol.  These are found in after-shave, cosmetics, scented household products, shampoos, soaps, toiletries.
garlic/onion sensitizerallyl disulfide
AKA rhodinol.  Obtained from geranium oil; greatest component of oil of rose and palmarosa oil.  Used in detergents, flavorings, insect repellants, soaps.  Component of fragrance mix; allergen in T.R.U.E. test.
Germall IIAKA diazolidinyl urea; common preservative in cosmetics, creams, hair products, lotions, shampoo
Antimicrobial common in medicine and dentistry (cold sterilization).   Leather tanner and photographic gelatin hardener.
glycerol thioglycolatePermanent wave hair solution
para-phenylenediamine, nickel, glyceryl monothioglycolate, formaldehyde, hair dyes, perfumes, rubber gloves
hand dermatitis; foods
corn, fruit juice, pineapple, wet foods
Hermal testsee patch test
beefsteak, cheese, chicken liver, eggplant, spinach, tomatoes, wine (red)
Used as fixative in cosmetics, perfumes, flavoring agent, fragrance (lily of the valley), pesticides, soaps.  FDA approved for use in foods.  Component of fragrance mix; allergen in T.R.U.E. test.
hypersensitivity reactions
Type I (IgE-dependent); IgE mast cell degranulation; pruritus, urticaria, anaphylaxis
Type II (cytotoxic); hapten binding to tissue proteins, drug-antibody complex formation
Type III (immune complex); drug-antibody conjugates enter circulation; serum sickness, immune complex vasculitis, occurs 7-10 days after exposure
Type IV (cell-mediated, delayed hypersensitivity); T-lymphocyte mediated with release of lymphokines; allergic contact dermatitis
imidazolidinyl ureaCommon preservative in cosmetics; creams, deoderant, hair conditioner, lotions, shampoo.  Weak formaldehyde releaser. AKA Germall 115
Flavoring agent and in perfumes.  Component of fragrance mix; allergen in T.R.U.E. test.
isothiazolinoneIn cosmetics and skin care products, industrial fluids and greases, medications, household cleaners.
nickel sensitivity most common, also gold
Jones-Mote reactioncutaneous basophil hypersensitivity; observed in animal models of ACD
Kathon CGAKA methylchloroisothiazolinone; non-formaldehyde releasing preservative found in cosmetics.
lanolinIn wool alcohol, wool fat, wool grease, wool wax
lanolin sensitivityLow in normal skin, moderate in eczema, high in venous dermatitis and ulcers.
latex allergyCross react with figs, pollen.  Increased incidence in spina bifida patients, health care workers.  Major allergens b1 to b8. From Henea brasiliensis tree.
lemon, orange peel
leukoderma, contact
butylcatechol, para-tertiary butylphenol, phenolic detergents
In adhesives, black tires, cleansers, coolants, detergents, fungicides, greases, photographic film emulsion, rubber, rubberized fabrics (bras & girdles), shoes, veterinarian medicaments
mercapto mixIn coolants, glues, industrial products, rubber.
chromium, nickel
musk ambretteperfume fixative--causes photoallergic dermatitis and ACD; found in detergents, fragrance, lotions, soap. 
nail polish
toluene sulfonamide/formaldehyde resin
neomycin cross-reactors
butirosin, gentamicin, kanamycin, paromomycin, spectinomycin, streptomycin, tobramycin
neomycin-sensitive patients
Substitute betadine, Bactroban, ilotycin
neomycin sulfate
Aminoglycoside antibiotic; most common topical antibiotic allergen (approx. 5% of persons are sensitive).  Delayed patch test reading up to 4-5 days.  Allergen in T.R.U.E. test.
nickel sulfate
Very common sensitizer (approx. 10% of women).  In alloys, dentures, eating utensils, eyeglass frames, jewelery, orthopedic appliances, pigments, scissors, razors.  Allergen in T.R.U.E. test.
North American seriesStandard series patch test (2007-8) contains: 1. Benzocaine  2. Mercaptobenzothiazole  3. Colophony  4. P-phenylenediamine  5. Imidazolidinyl urea  6. Fragrance mix II  7. Lanolin alcohol  8. Carba mix  9. Neomycin sulfate  10. Thiuram mix  11. Formaldehyde  12. Ethylenediamine dihydrochloride  13. Bisphenol A epoxy resin  14. Quaternium-15  15. p-tert-Buthylphenol formaldehyde resin  16. Mercapto mix  17. Black rubber mix  18. Potassijm dichromate  19. Myroxylon perelrae (Balsam of Peru)  20. Nickel sulfate  21. Diazolidinyl urea  22. DMDM hydantoin  23. Imidazolidinyl urea  24. Bacitracin  25. Mixed dialkyl thioureas  26. Methylchloroisothiazolinone /methylisothiazolinone  27. Paraben mix  28. Cinnamic aldehyde  29. Fragrance mix  30. Amidoamine  31. 2-bromo-2-nitropropane-1,3-diol  32. Sesquiterpene lactone mix  33. 2-hydroxyethylmethacrylate  34. Propylene glycol  35. Benzophenone-3  36. Chloroxylenol (PCMX)  37. DMDM hydantoin  38. Diazolidinyl urea  39. 40. Methyldibromoglutaronitrile/phenoxyethanol  41. Benzyl alcohol  42. dl alpha tocopherol  43. 44. Ethyl acrylate  45. Glyceryl thioglycolate  46. Tosylamide formaldehyde resin  47. Methyl methacrylate  48. Cobalt chloride  49. Tixocortol-21-pivalate  50. Budesonide  51. Hydrocortisone-17-butyrate  52. Disperse blue 106  53.   54. Lidocaine  55.  56. Clobetasol 17 propionate  57. Cocamidopropyl betaine  58. Bisphenol F epoxy resin  59. Triamcinolone acetonide  60. Dimethylol dihydroxyethyleneurea  61. Cocamide DEA  62. Compositae mix  63. Glutaral  64. Tea tree oil, oxidized  65. ylang-ylang oil
oak moss absolute
In after-shave (woodsy odor) and perfumes.  Component of fragrance mix; allergen in T.R.U.E. test.
parabenpreservative with low sensitization of <0.5%; used in cosmetics, drugs, packaged mixes, salad dressing, TV dinners
Black hair dye; frequent cause of contact dermatitis in hairdresser’s hands.  Used in photography, printer's ink, rubber vulcanization.  Cross reacts with benzocaine, ester anesthetics, PABA, sulfonamides
patch test (standard)
Hermal contains; medications; benzocaine, neomycin sulfate preservatives; imidazolidinyl urea, quaternium-15, formaldehyde rubber compounds; thiuram mix, mercaptobenzothiazole, carba mix, black rubber IPPD, mercapto mix vehicle; lanolin alcohol metals; nickel sulfate, potassium dichromate fragrances; cinnamic aldehyde, balsam of Peru resins; epoxy, p-tert-butylphenol formaldehyde, colophony miscellaneous; ethylenediamine dihydrochloride, p-phenylenediamine
T.R.U.E. test (Thin-layer Rapid Use Epicutaneous Test) contains; medication; quinoline mix, caine mix, neomycin sulfate preservatives; paraben mix, Cl Me isothiasolinone, thimerosal, quaternium-15, formaldehyde rubber compounds; thiuram mix, mercaptobenzothiazole, carba mix, black rubber PPD mix, mercapto mix vehicles; wood alcohol metals; cobalt chloride, nickel sulfate, potassium dichromate fragrances; fragrance mix, balsam of Peru  resins; epoxy, p-tert-butylphenol formaldehyde, colophony miscellaneous; ethylenediamine dihydrochloride, p-phenylenediamine 
patch test grading
?; doubtful reaction manifested by faint erythema
+1; weak positive reaction manifested by infiltrated erythema with possible papules
+2; strong reaction showing papules & vesicles
+3; extreme reaction with confluent bullae
phenylenediamineIn hair dyes, inks, photodevelopers, textile dyes
photoallergic dermatitis
antibiotic/antifungal; bithionol, fenticlor, jadit, multifungin, salicylanilides (halogenated)
fragrances; 6-methylcoumarin,musk ambrette
medications; chlorpromazine, piroxicam, promethazine, sulfanilamide
miscellaneous; plants of the Compositae family, diphenhydramine, psoralen, sandalwood, stilbenes, sulfonylureas, thiazides
sunscreens; benzophenone, digalloyltrioleate, PABA esters
photocontact dermatitis Psoralen-containing foods and contactants most likely.
phototoxic reaction producing
coal-tar: acridine, anthracene, phenanthrene
drugs: phenothiazines, sulfonamides
dyes: acridine orange, acriflavine, anthraquinone, dibromofluorescein, eosin, methylene blue, neutral red, rose bengal, toluidine blue
furocoumarins: psoralen, 8-methoxypsoralen, 4,5,8-trimethylpsoralen
Compositae: milfoil, stinking mayweed, yarrow
Moraceae: figs
Papilionaceae: psoralen
Rutaceae: bergamot, bitter orange, burning bush, fraxinella, gas plant, lemon, lime, Persian lime
Umbelliferae: angelica, carrot, chervil (wild), cow parsley, dill, fennel, giant hogweed, lovage, masterwort, parsnip
acrylic nails, resins (epoxy & formaldehyde), nail lacquer
poison ivy, oak
catechols, urushiol (Rhus plants)    see Toxicodendron
potassium dicromateMost chromium allergies are due to this compound, a hexavalent form of chromium.  In anticorrosives, cement, detergents (some), electroplating solutions, glues, leather tanning, paints, photography developing, pigments, safety matches.  Allergen in T.R.U.E. test.
preservatives in food
benzoic acid, calcium propionate, citric acid, monoglycerol citrate, parabens, polysorbate, quaiac gum, sodium benzoate, sodium bisulfite, sorbic acid
propylene glycolCommon cosmetic and pharmaceutical base vehicle.  Used in food as coloring solvent and for flavoring.  Inhibits fungal growth.  Used as a humectant and in industrial coolants.
psoralen-containingbuckwheat, buttercup, carrot, celery, clover, cocklebur, dill, ferns, figs, goose foot, greens, limes, lemons, meadow grass, parsley
purpuric ACDbenzoyl peroxide, cobalt, disperse blue dye, epoxy resin, methylmethacrylate, para-phenylenediamine, 
rhus plants genus, speciesFamily: Anacardiaceae  Rhus toxicodendron: poison ivy  Rhus diversilobium: poison oak  Rhus vernix: poison sumac 
rubber acceleratorscarbamate, mercaptothiobendazole, thiurams
rubber allergyactually, is most common due to accelerators in rubber
quaterniumPreservative in cosmetics, household cleaners and polishes; formaldehyde releaser.
quaternium-15formaldehyde-releasing preservative (AKA Dowicil 200)
quinoline mixAllergen in T.R.U.E. test; contains clioquinol and chlorquinaldol, antibiotics found in creams, medicated bandages, ointments,  vetenarian products.
rhodinolsee geraniol
Brazilian pepper, cashews, gingko tree, Indian marking nut, poison ivy, poison oak, poison sumac, Japanese lacquer tree, mango, rengas tree
rosacea (potential triggers)
activity/emotions: anxiety, exercise, stress
beverages: alcohol (esp. beer, bourbon, champagne, gin, red wine, vodka), hot drinks (all kinds)
foods: avocados, bananas, broad leaf beans and pods (navy, lima, pea), cheese (except cottage cheese), chocolate, citrus fruits, eggplant, figs, foods high in histamine, liver, plums (red), raisins, sour cream, soy sauce, spicy foods, spinach, thermally hot foods, tomatoes, vanilla, vinegar, yeast extract, yogurt
medications: vasodilators, topical steroids
medical conditions: chronic cough, menopause
skin care products: acetone, fragrances, hydro-alcohol, witch hazel
temperatures: hot baths, hot tubs, overheating, saunas
weather: cold weather, hot weather, humidity, strong winds, sun
AKA colophony.  Used by baseball batters, bowlers, violinists.  In adhesives, cosmetics, lacquers, paper, soldering flux, varnishes.
sensitized to: may be sensitive to/flares with
benzocaine: azo dyes, PAS, procaine, sulfa
ethylenediamine: tripelennamine/pyribenzamine, pyrilamine/Triaminic, piperazine, hydroxyzine groups (aminophylline, Merthiolate, Mycolog)
formaldehyde: methenamine
iodine: contrast agents, SSKI
neomycin: aminoglycosides
PABA: azo dyes, PAS, procaine, sulfa
poison ivy: mangoes
PPD: azo dyes, PAS, procaine, sulfa
thiuram: disulfiram
sensitizers, topical that may provoke reaction upon systemic administration
balsam of Peru, caladryl, chlorobutanol, cobalt, diphenhydramine, disulfiram, ethylenediamine hydrochloride, ethyl aminobenzoate, formaldehyde, halogenated hydroxyquinolones, hydrazine hydrobromide, iodine, mercurials (organic & inorganic), metallic mercury, neomycin, paraphenylenediamine, resorcinol, thiamin, thiram
sensitizers; topical that may sensitize & related medications that may produce contact-type dermatitis
alcohol: alcoholic beverages     aminophylline suppositories: ethylenediamine antihistamine   ammoniated mercury: organic & inorganic mercurials, mercury amalgam     antistine drops: ethylenediamine antihistamines     arnica (tincture): elixir terpene hydrate    balsam of Peru: benzoin inhalation     Benadryl; dramamine     benxocaine: see para-amino compounds bismark brown: see para-amino compounds     disphenol A: diethylstilbestrol     caladryl cream: benadryl, dramamine     chlorobutanol: chloralhydrate     chloroquin: atabrine    cobalt chloride: vitamin B12    epoxy amine hardener: ethylenediamine antihistamine, aminophylline   ethylenediamine hydrochloride: ethylenediamine antihistamines formaldehyde: urotropin, mandelamine, urised     glyceryl PABA sunscreens: see para-amino compounds     halogenated hydroxyquinolines: vioform, dioquin    hydralizine hydrochloride: isoniazid, apresoline, nardil    iodine: iodides, iodinated organic compounds   mercurochrome: see mercury    mercury:mercurial diuretics, calomel, mercury amalgam   methylene blue: phenothiazines     neomycin sulfate: streptomycin, kanamycin, framycetin, paranomycin    orange peel oil: elixir terpene hydrate     para-amino compounds: PABA, azo dyes, Dymelor, Orinase, Diabinese, sulfonamides, Diuril, Hydrodiuril, Saluron, renese, para-aminosalicylic acid     phenothiazine: phenergan     quinilor compound: vioform, dioquin resorcin: hexylresorcinal     thiram, disulfram: antabuse     triethylenetetramine: ethylenediamine antihistamine, aminophylline    turpentine-cardamon flavor: elixir terpene hydrate
sesquiterpene lactone containing plants
arnica, artichoke, bitterweed, boneset, broomweed, burdock, burrobrush, capeweed, chamomile, champaca, chicory, chrysanthemum, cocklebur, cosmos, costus, cottonthistle, encelia, feverfew, fireweed, fleabane, guayule, hempweed, ironweed, laurel oil, leafcup, lettuce, liverwort, marguerite, marigold, marsh elder, oxeye, pyrethrum, ragweed, sagebrush, sneezeweed, sowthistle, starthistle, stinkwort, sunflower, tansy, tulip tree, whitewood, wormwood, yarrow
shoe dermatitis
mercaptobenzothiazole, tetraethylthiuram, potassium dichromate, para-tertiary butylphenol formaldehyde
sorbitan sesquioleateEmulsifier and stabilizer in agricultural chemicals, cosmetics, drugs, foods, plastics, textiles
spermicide sensitizers
hexylresorcinol, nonoxyl, oxyquinoline sulfate, phenylmercuric acitate, phenylmercuric borate, quinine hydrochloride
spices; eczematous dermatitis
capsicum, cayenne pepper, cinnamon, cloves, laurel, mace, nutmeg, vanilla
steroid groups

Group A: hydrocortisone, methyprednisolone, prednisolone, prednisone, tixocortal pivalate  Group B: amcinonice, budesonide, desonide, fluocinolone, halcinonide, triamcinolone  Group C: desoximetasone, diflucorolone-21-valcrate, halometasone, betamethasone  Group D: betamethasone17,21-diproprionate, betame3thasone-17-valerate, budesonide, clobetasol, hydrocortisone-17-butyrate

systemic dermatitis
alcohol, aminophylline, azo dyes, benzocaine, calomel, chloral hydrate, cinnamon, diphenhydramine, doxylamine, dramamine, ethylenediamine (Phenergan), formaldehyde, hydralazine, hydrazine, iodine, isoniazid, mandelamine, mercurials, methenamine, Nardil, neomycin, oral hypoglycemic agents, PABA, para-phenylenediamine, p-aminosalicylic acid, penicillin, phenothiazines, procaine, potassium iodide, procainamide, quinine, quinidine, resorcinol, saccharin, silvadene, streptomycin, sulfonamides, thiamin, thiuram, vitamin B12
azo dyes
thimerosalOrganic mercurial preservative in contact lens solution, cosmetics, disinfectants, injectables, vaccines, Ig preparations, nose and ear drops.
#1 cause of glove-induced hand dermatitis.  Common rubber allergen in adhesives, disinfectants, fungicides, germicides, insecticides, lubricating oils, medications (Antabuse), neoprene, neoprene adhesives, pesticides, polyolefin plastics, putty, repellents, latex preservative, rubber vulcanization accelerators, shampoo, soap
tixocortal pivalatetesting agent for Group A steroid sensitivity
Toxicodendron plants
poison ivy (Toxicodendron radicans), poison oak (Toxicodendron quercifolium), poison oak (Toxicodendron diversiloba), poison sumac (Toxicodendron vernix)
relatives; black varnish tree, Brazilian pepper, cashew nut tree, el litre tree, ginko tree, Japanese lacquer tree, mango, marking nut tree (India), pepeo tree, rengas tree
T.R.U.E. testThin-layer Rapid Use Epicutaneous Test; see patch test
ulcers, agents may cause sensitization
ethylenediamine hydrochloride, lanolin, neomycin, nitrofurazone, paraben preservatives, Vitamin E creams
cholinergic: emotional stress, exercise, heat
foods: bananas, caffeine, cheese, chocolate, citrus, coffee, cow milk, eggs, fish, grapes, mushrooms, nuts, pork, shellfish, strawberries, tomatoes, vegetables, wheat, yeast fermentation (alcohol)
fungus: dermatophytes, candidiasis
infection; dental, sinus, tonsillar, gallbladder, GI, GU
inhalants: pollens, mold, feather down, smoke, volatile chemicals, animal dander, spores, aerosols, dust
injectants: blood, insect stings, vaccines
insects: bedbugs, mites, fleas
medications: amidopyrine, antibiotics, aspirin, atropine, cocaine, codeine, ibuprofen, indomethacin, mefanamic acid, morphine, penicillin, phenylbutazone, pilocarpine, polymyxin B, quinine, sodium benzoate, sulindac, tartrazine (FDA yellow dye, No. 5), thiamin
parasites: amebiasis, Ancylostoma, Ascaris, Echinococcus, Fasciola, Filariae, giardiasis, malaria, Schistosoma, Strongyloides, Trichinella, Toxocara
physical: cold, heat, pressure, solar, vibration, water
viral: hepatitis B, infectious mononucleosis, coxsackie
urticaria & delayed eczema
acrylic acid, ammonium persulfate, benzocaine, castor bean, cinnamic aldehyde, endive, epoxy resin, latex, lemon perfume, lettuce, nickel, rhodium, platinum, rubber, sorbic acid, teak, vinyl pyridine
urticaria, cold
cryoglobulinemia, cryofibrinogenemia, cold hemolysins, syphilis, connective tissue d., hematopoietic malignancy
urticaria, contact
animals: arthropods, cockroach, dander, guinea pig, hair, jellyfish, saliva (dog, rat)
antibiotics: bacitracin, cephalosporin, chloramphenicol, gentamicin, neomycin, penicillin, rifamycin, streptomycin
chemicals: acrylic monomer, aliphatic polyamine, aminophenazone, aminothiazole, ammonia, ammonium persulfate, balsam of Peru, benzaldehyde, benzoic acid, benzophenone, butyl-hydroxytoluene, camphor, CaOCl2, cassia oil, cetyl alcohol, cinnamic acid, cinnamic aldehyde, clioquinol, cobalt chloride, diethyltoluamide, dimethylsulfoxide, diphenylcyclopropenone, epoxy resin, ethyl aminobenzoate, lanolin, lindane, formaldehyde, menthol, monoamylamine, NaOCl, parabens (ethyl, methyl), polyethylene glycol 3-400, polysorbate, phenyl mercuric propionate, p-aminodiphhenylamine, platinum salts, salicylic acid, sorbic acid, stearyl alcohol, sulfur dioxide, terpinyl acetate, vanillin, vinyl pyridine, vitamin E oil, xylene
medications: see medication section
cosmetics: nail polish, hair spray, perfumes
foods: apricot pit, apple, bean, beer, buckwheat flour, caraway seed, carrot, cucumber pickle, egg, endive, fish, flour, garlic, kiwi, lettuce, litchi, maize, mango, meat (chicken, lamb, turkey, beef, liver, pork), milk, mustard, peach, peanut, potato, rice, salami casing (mold), shellfish, soybean, spices, strawberry, tomato, watermelon
other: serum (horse, tetanus), rhus, rubber
plants: cactus, marine plants, nettles
textiles: silk, wool
wood: exotic woods
urticaria, immediate (foods)
fruits: apple, kiwi, peach, strawberry
meats: beef, calf liver, lamb, pork, turkey
miscellaneous: beer, cheese, egg, flour, milk, salad dressing (sorbic acid)
seafood: codfish, lobster, prawns, shrimp
vegetables: bean, carrot, lettuce, onion, parsley, parsnip, potato, rice, tomato
urticaria, non-allergic contact
acetic acid, alcohol, balsam of Peru,benzoic acid, caterpillar hair, cinnamic acid, cinnamic aldehyde, cobalt chloride, dimethyl sulfoxide, insect stings, methyl nicotinate, moths, nicotinic acid ester, sodium benzoate, sorbic acid
vegetables, eczematous dermatitis
artichoke, asparagus, carrot, celery, chicory, chives, corn, cucumber, endive, garlic, horseradish, leek, lettuce, onion
vitiligo, contact
chemicals: diisoprophyl fluorophosphate, hydroquinione, mercaptoamines, p-cresol, p-isopropylcathechol, p-methylcatechol, p-nonylphenol, p-octylphenol, p-tert-amylphenol, p-tert-butylcatechol, p-tert-butylphenol, physostigmine, thio-TEPA
other: adhesive tape, germicidal phenolic detergents, latex glue, rubber products, shoes, wristwatch straps
wool alcohols
Lanolin-derived; a weak, but common allergen.  Found in cosmetics (creams, lotions, ointments, soaps).  Allergen in T.R.U.E. test.

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