Passive cutaneous anaphylaxis detect:
Ans. (a)Passive cutaneous anaphylaxis-in vivo method for detection of antibodies.Antigen injection intradermally then same antigen with a dye injected IV - after 4 to 24 hours - wheal flare reaction occurs in intradermal site.Helps to detect IgG ab which is heterocytotropic, not for IgM which is homocytotropic.
Heterocytotropic ab
Wheal and flare reaction
Atopy
Cutaneous anaphylaxis
Immunology