Featured Research

from universities, journals, and other organizations

Some Outgrow Allergy To Tree Nuts, Johns Hopkins Children's Center Experts Report

Date:
November 9, 2005
Source:
Johns Hopkins Medical Institutions
Summary:
Nine percent of children allergic to almonds, pecans, cashews and other tree nuts outgrow their allergy over time, including those who've had a severe reaction such as anaphylaxis shock, according to researchers at the Johns Hopkins Children's Center.

Nine percent of children allergic to almonds, pecans, cashews and other tree nuts outgrow their allergy over time, including those who've had a severe reaction such as anaphylaxis shock, according to researchers at the Johns Hopkins Children's Center.

Their study, reported in the November issue of the Journal of Allergy and Clinical Immunology, also found that clinicians can use blood levels of tree nut antibody (TN-IgE) as an accurate guideline in estimating the likelihood that a child has outgrown the allergy.

"What's crystal clear is that children with these allergies should be regularly re-evaluated," researchers concluded.

"Allergic reactions to tree nuts as well as peanuts (which are not nuts but legumes) can be quite severe, and they are generally thought to be lifelong," says senior author Robert Wood, M.D., director of the Division of Allergy and Immunology at the Children's Center. "Our research shows that for some children, however, lifelong avoidance of these nuts, found in countless food products, may not be necessary."

In the United States, an estimated one to two percent of the population is allergic to tree nuts (almonds, pecans, walnuts, cashews, Brazil nuts, hazelnuts, pine nuts, pistachios and macadamia nuts), peanuts or both. Wood and colleagues previously reported that as many as 20 percent of children outgrow peanut allergy and recommended that allergists periodically retest their patients. The current study explored whether the same held true for tree nuts.

Wood and colleagues evaluated 278 children, ages 3 to 21 years old, with a known allergy to tree nuts. Nine percent passed oral food challenges, the standard test to prove a child has outgrown a food allergy. Fifty-eight percent of children with TN-IgE levels of 5 kilounits per liter or less also passed the challenge.

"These findings give allergists a safe guideline in deciding whether to advise their patients to continue avoiding tree nuts, or whether it's time to try an oral food challenge to see if they've outgrown the allergy," says Wood. He cautioned that oral food challenges should be presented only under the close supervision of an allergist.

The study also found that, of children allergic to both peanuts and tree nuts, those who had outgrown their peanut allergy were more likely to outgrow the tree nut allergy. Children who are allergic to more than one type of tree nut are unlikely to outgrow their allergy.

###

The study was funded in part by the National Institute of Allergy and Infectious Disease.


Story Source:

The above story is based on materials provided by Johns Hopkins Medical Institutions. Note: Materials may be edited for content and length.


Cite This Page:

Johns Hopkins Medical Institutions. "Some Outgrow Allergy To Tree Nuts, Johns Hopkins Children's Center Experts Report." ScienceDaily. ScienceDaily, 9 November 2005. <www.sciencedaily.com/releases/2005/11/051109092647.htm>.
Johns Hopkins Medical Institutions. (2005, November 9). Some Outgrow Allergy To Tree Nuts, Johns Hopkins Children's Center Experts Report. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2005/11/051109092647.htm
Johns Hopkins Medical Institutions. "Some Outgrow Allergy To Tree Nuts, Johns Hopkins Children's Center Experts Report." ScienceDaily. www.sciencedaily.com/releases/2005/11/051109092647.htm (accessed July 29, 2014).

Share This




More Health & Medicine News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Generics Eat Into Pfizer's Sales

Generics Eat Into Pfizer's Sales

Reuters - Business Video Online (July 29, 2014) Pfizer, the world's largest drug maker, cut full-year revenue forecasts because generics could cut into sales of its anti-arthritis drug, Celebrex. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Nigeria Ups Ebola Stakes on 1st Death

Nigeria Ups Ebola Stakes on 1st Death

Reuters - Business Video Online (July 29, 2014) Nigerian authorities have shut and quarantined a Lagos hospital where a Liberian man died of the Ebola virus, the first recorded case of the highly-infectious disease in Africa's most populous economy. David Pollard reports Video provided by Reuters
Powered by NewsLook.com
Running 5 Minutes A Day Might Add Years To Your Life

Running 5 Minutes A Day Might Add Years To Your Life

Newsy (July 29, 2014) According to a new study, just five minutes of running or jogging a day could add years to your life. Video provided by Newsy
Powered by NewsLook.com
Ebola Outbreak Poses Little Threat To U.S.: CDC

Ebola Outbreak Poses Little Threat To U.S.: CDC

Newsy (July 29, 2014) The Ebola outbreak in West Africa poses little threat to Americans, according to officials with the Centers for Disease Control and Prevention. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins