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.
Immunology
Heterocytotropic ab
Wheal and flare reaction
Atopy
Cutaneous anaphylaxis
Heterocytotropic ab