The use and interpretation of RAST to stinging insect venoms.

Quality controlled, standardized RAST systems for five stinging insect venoms are described. These systems were evaluated using 375 sera from insect reactive patients from six diverse geographic regions. Ninety-four percent of patients with recent histories of systemic allergic reactions to stings were positive to at least one venom while 4 percent of normal local reactors were positive. The cross reactions between honey bee and vespid venoms were studied by RAST inhibition. A quantitative method for interpretation of venom RAST is presented to account for cross-reactivities and the approach to diagnosis is discussed.