Question | Answer |
Atopy is ____ mediated | IgE |
Most common of the atopic disorders | allergic rhinitis |
allergic rhinitis is rare in: | infants <6 months |
allergic rhinitis: Dx by: | Clinical; allergy prick skin tests-; serum RAST tests; nasal smear eosinophilia |
allergic rhinitis: Tx includes: | allergen avoidance, pharm; immunotherapy |
atopic dermatitis: labs | Allergy skin tests; ImmunoCAP to specific antigens; Skin cx; Double blind food challenge |
Gold standard to dx food allergies | double-blind food challenge |
atopic dermatitis has a strong association with ____ allergies | food allergies |
Atopic dermatitis: Clinical features (Major) | Pruritis; rash distribution varies; Relapsing nature; h/o other allergic sx |
Atopic dermatitis: acute lesions | poorly defined papules, patches and plaques; +/- scale; edema, erythema and excoriation |
Atopic dermatitis: chronic lesions | skin thickening (lichenification) , hyperpigmentation |
Atopic dermatitis: Clinical features (minor) | xerosis; hyperlinear palms; infraorbital shiners (Dennie lines); food intolerances; secondary cutaneous infxn )SA, MRSA, HSV); wool intolerance; increased itch with sweating |
allergic rhinitis DDx | sinusitis; rhinitis medicamentosa;; local (polyp, deviated septum, adenoid, foreign body); vasomotor rhinitis |
atopic dermatitis DDx | seborrhea; contact dermatitis (nickel); scabies |
allergic rhinitis DDx | sinusitis (HA, purulent d/c, PND); rhinitis medicamentosa; local (polyps, deviated, FB); vasomotor |
Seasonal allergies usu present at age: | >3 yrs |
Six foods cause 90% of food allergy in children: | Milk, egg, peanut, wheat, soy, tree nuts |
ImmunoCap test: No proven value of food specific: | IgG levels |
Food allergy: tx | eliminate offending food; pt education; Medic Alert bracelet; emergency plan; Epi Pen |
Which allergies usually resolve by 10-12 yo & which persist? | Milk, egg, wheat, soy resolve; tree nuts, peanut, & seafood persist into adulthood |
Food anaphylaxis | 150 deaths/year; peanut, tree nut, shellfish; biphasic rxn; lack of cutaneous sx |
Food allergies: effectiveness not established for: | breastfeeding >6 mos; maternal diet restrictions; delayed intro of allergic foods; hypoallergenic formulas |
Oral allergy syndrome: usually with: | fresh fruits/veg; cross-reactive proteins in pollen & food |