system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Chronic urticaria is a -
assistant
The correct answer is  Ans. is 'a' i.e., Type 1 hypersensitivity reaction Types of hypersensitivity reactionType of hypersensitivity reactionExamplesMediatorsType 1 (immediate type)Atopic dermatitisUrticariaAnaphylaxisInsect bite hypersensitivityAllergic rhinitis and asthmaIgEType 2 (cytotoxic, antibody dependent)Autoimmune hemolytic anemiaRheumatic heart diseaseThrombocytopeniaErythroblastosis foetalisGoodpasture's syndromeGrave's diseaseMyasthenia gravisIgG or IgMMACComplementType 3 (immune complex disease)Serum sicknessArthus reactionRheumatoid arthritisPost streptococcal glomerulonephritisMembranous nephropathyLupus nephritisSystemic lupus erythematosusExtrinsic allergic alveolitis(hypersensitivity pneumonitis)Generalized drug eruptionErythema multiformeErythema nodosumTENIgGComplementNeutrophillsType 4 (delayed type)TuberculosisLeprosyContact dermatitisChronic transplant rejectionMultiple sclerosisT-cells