Delayed hypersensitivity

Introduction: Delayed hypersensitivity

Description of Delayed hypersensitivity

Delayed hypersensitivity: (1) SYN: cell-mediated immunity. (2) SYN: delayed reaction. (3) a cell-mediated response that occurs in immune people peaking at 24-48 hours after challenge with the same antigen used in an initial challenge. The interaction of T-helper 1 (Th-1) lymphocytes with MHC class II positive antigen-presenting cells initiates the response. This interaction induces the Th-1s and macrophages at the site to secrete cytokines, which are the major factors in the reaction. Called tuberculin-type hypersensitivity.
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.

Delayed hypersensitivity: Delayed hypersensitivity reaction (DTH) - type IV reaction, an inflammatory response that develops 24 to 72 hours after exposure to an antigen that the immune system recognizes as foreign. DTH is mediated by T cells rather than by antibodies. Th1 cells produce interferon gamma, interleukin (IL)-2, and tumor necrosis factor-beta and promote a cell-mediated immune response.
Source: Diseases Database

Delayed hypersensitivity: increased reactivity to specific antigens mediated not by antibodies but by cells.
Source: CRISP

Delayed hypersensitivity: Related Topics

These medical condition or symptom topics may be relevant to medical information for Delayed hypersensitivity:

• Hypersensitivity (30 causes)

Terms associated with Delayed hypersensitivity:

Terms Similar to Delayed hypersensitivity:

• Hypersensitivity type 4

Source: Diseases Database

More specific terms for Delayed hypersensitivity:

• contact dermatitis

Source - CRISP

Broader terms for Delayed hypersensitivity

• hypersensitivity

Source - CRISP

The term Delayed hypersensitivity can be used for:

• cell mediated hypersensitivity
• tuberculin type hypersensitivity
• type IV hypersensitivity

Source: CRISP

Other terms that may be related to Delayed hypersensitivity:

• cellular immunity

Source: CRISP

External links related to: Delayed hypersensitivity

• eMedicine - Hypersensitivity Reactions, Delayed : Article by Walter Duane Hinshaw, DO
• eMedicine - Delayed-type Hypersensitivity : Article by Harumi Jyonouchi, MD

Source: Diseases Database

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