delayed hypersensitivity


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Related to delayed hypersensitivity: Delayed Hypersensitivity Skin Test

delayed hypersensitivity

[di′lād ‚hī·pər‚sen·sə′tiv·əd·ē]
(immunology)
Abnormal reactivity in a sensitized individual beginning several hours after contact with the allergen.
References in periodicals archive ?
Delayed hypersensitivity was demonstrated by the in vitro migration inhibition by specific antigen (PPD) of lymphoid cells obtained from sensitized tilapia.
Symptoms are usually dermatitis, rash, and itching.[11-20] Dermatitis is a Type IV cell-mediated delayed hypersensitivity reaction commonly considered to be CD4+T-cell-mediated, not IgE-mediated.
and many others have confirmed that MTX depresses established delayed hypersensitivity. (10) Additionally, a recent study suggested that Methotrexate promotes the apoptosis of activated T cells, which in turn limits T-cell proliferation.
Delayed hypersensitivity to dental materials has occasionally been implicated, and the removal of amalgam has caused reduction of swelling of buccal mucosa and lips of OFGin isolated cases.
In addition, the duration of DPT is important because many patients with delayed hypersensitivity react only after prolonged consumption of antibiotics.
The delayed hypersensitivity response is reduced, but B and T cells remain normal.
provide the only assays for all 3 delayed hypersensitivity pathways in the first single step ELISA and the first ELISA done on the surface of a living cell.
We conducted a prospective study of 60 patients in a tertiary care referral center to ascertain the status of cell-mediated immunity as determined by delayed hypersensitivity reactions in patients with nasopharyngeal carcinoma (NPC) or allergic rhinitis.
After extravasation of the intravenous hirudin site, the patient developed a delayed hypersensitivity reaction that histologically showed an epithelioid granulomatous infiltrate.
Because immunocompromised patients have a decreased ability to mount a delayed hypersensitivity response, a positive TST result for them is defined as [is greater than or equal to] 5 mm of in duration (36) rather than [is greater than or equal to] 10 mm [CIII].
Tuberculin test; delayed hypersensitivity; skin tests; anergy (cutaneous).

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