While a peanut allergy is commonly associated with pediatric care, a new study has found that up to one in six adults with sensitivity to peanuts developed it after age 18. The report, put forth by Northwestern University researchers in the Journal of Allergy and Clinical Immunology, found that 2.9% of U.S. adults report a current peanut allergy, but only 1.8% report a physician-diagnosed allergy and or history of reaction symptoms.; "Given the high prevalence of peanut allergy among U.S. adults, additional therapies are needed to help address this growing burden of disease," Dr. Ruchi Gupta, study author and professor of pediatrics at Northwestern University Feinberg School of Medicine and a physician at Ann & Robert H. Lurie Children's Hospital of Chicago, said in the Eurekalert.org news release.