alexa Evaluation of decline in serum venom-specific IgE as a criterion for stopping venom immunotherapy.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Randolph CC, Reisman RE

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Abstract During a 7-year period, venom immunotherapy has been stopped in 57 patients because of a fall in IgE antibody titers to insignificant levels (RAST less than 10\% STD). All patients had a history of venom anaphylaxis and elevated venom-specific IgE before therapy. Maintenance doses of 50 micrograms were administered every 4 to 6 weeks; 30 patients received yellow jacket venom, and 16 patients received honeybee venom only. Therapy was stopped after treatment from 1 to 8 years (mean 2.8 years). Repeat skin tests demonstrated an average two-log decrease in sensitivity; 35 of 55 tests remained positive at venom concentrations of less than or equal to 0.1 micrograms/ml. There were 55 re-stings in 24 patients, occurring from 3 months to 5 years after cessation of therapy, resulting in three systemic reactions. One patient, previously treated with bee venom, reacted to a yellow jacket sting. These re-sting reactors also had tolerated several other stings after therapy was stopped. Thus, the two actual reactions represent a "failure" rate of 8\% per patient and 4\% per sting, compared to reaction rates of 27\% and 17\% in patients who stopped therapy without physician advice. These data suggest that this criterion may be reliable for stopping therapy. However, subsequent tolerated re-stings may require continued patient evaluation.
This article was published in J Allergy Clin Immunol and referenced in Journal of Clinical & Cellular Immunology

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