The Effect of Increasing Ragweed Pollen Counts On Skin Prick Reactions

Abstract

We previously demonstrated an increasing trend of ragweed counts in the Midwest over the last 13 years with a statistically significant difference between the first five years and the last five years. We hypothesize that increasing ragweed counts and exposure over the last 13 years is associated with an increase in prevalence of clinical reactivity to ragweed demonstrated by skin prick test reactions.