immediate hypersensitivity

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immediate hypersensitivity

[i′mē·dē·ət ‚hī·pər·sen·sə′tiv·əd·ē]
(immunology)
A type of hypersensitivity in which the response rapidly occurs following exposure of a sensitized individual to the antigen.
References in periodicals archive ?
Type I reactions: These are mediated by IgE antibodies and are also known as immediate hypersensitivity reactions.
The immediate hypersensitivity reaction caused by mango can result in a lifethreatening event.
While testing the reaction to household allergens, moderate positive immediate hypersensitivity reaction was caused by the dog fur in 66.
An immediate hypersensitivity reaction generally occurs within five to 15 minutes after exposure to the offending antigen.
Because of the high risk for anaphylaxis, referral to an allergist is advised if a patient has an immediate hypersensitivity reaction after lidocaine exposure, but this is "exceedingly unusual, which is why lidocaine is still the number one local anesthetic used," he noted.

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