Preliminary report on the fractionation of ragweed pollen and immunologic studies with these fractions

Studies on the allergens of ragweed pollen

“…They did not discriminate between the sera which they used for their cross neutralization experimenta as to whether they were obtained from treated or untreated allergie persona nor were they aware of the fact that failure of a sensitized site to give a visible reaction does not necessarily imply that all the reagin in the site is neutralized. It is therefor surprising that previous investigators concluded, on the basis of their cross neutralization experimenta, that ragweed pollen con-tains a minimum of only two (53,79,86,92) or three (49,56,91) aller gens.…”