Allergic sensitization to different grass pollen extracts. A. Average skin prick test diameters for subtropical Bahia, Johnson and Bermuda grass pollens and temperate Ryegrass pollen. Box and whisker plots show median, interquartile range, 10th and 90th percentiles and minimal and maximal individual values for data from 48 grass pollen allergic donors from Brisbane. Significant differences by Friedman ANOVA and Dunn's multiple comparison test. B and C. Pairwise data for individual patient sensitivity comparing either Bahia or Bermuda grass pollen with Ryegrass pollen.