Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Food allergies raise risk of asthma attacks

04.10.2010
National survey identifies higher risk of food allergies among children, males, non-Hispanic blacks and people with asthma

Food allergies are more common among people with asthma and may contribute to asthma attacks, according to one of the most comprehensive surveys of food allergies ever undertaken. National Jewish Health Associate Professor of Pediatrics Andrew H. Liu and his colleagues also report in the November 2010 Journal of Allergy and Clinical Immunology that food allergies are more prevalent among children, males and non-Hispanic blacks.

"Our study suggests that food allergies may be an important factor, and even an under-recognized trigger for severe asthma exacerbations," said Dr. Liu. "People with a food allergy and asthma should closely monitor both conditions and be aware that they might be related."

The researchers, funded by the National Institute of Environmental Health Sciences (NIEHS), analyzed data from 8,203 people, aged 1 to greater than 60, who completed the National Health and Nutrition Examination Survey in 2005-2006, and had their blood tested for antibodies to four specific foods: peanuts, milk, eggs and shrimp.

"This study is very comprehensive in its scope," said Darryl Zeldin, MD, acting clinical director at the NIEHS and senior author on the paper. "It is the first study to use specific blood serum levels and look at food allergies across the whole life spectrum, from young children aged 1 to 5, to adults 60 and older."

Depending on the IgE antibody levels found in participants blood, they were categorized as sensitized to one or more of the foods or not sensitized. The sensitized participants were subdivided into those with an unlikely (10-20 percent), possible (50 percent) and likely (greater than 95 percent) chance of having food allergies.

Likely food allergies were twice as common among participants who had ever received an asthma diagnosis as among those with no asthma diagnosis.

The odds of having food allergies grew with increasing severity of asthma. Those who currently have asthma were 3.8 times as likely to have food allergies as those who had previously been diagnosed with the disease but no longer had it. Those who had visited an emergency department for asthma in the past year were almost seven times as likely to have food allergies as those who had ever been diagnosed with asthma but not visited an emergency department. Overall, 15.8 percent of participants who had visited the emergency department for asthma had IgE levels indicating possible or likely food allergies.

Researchers could not determine if food allergies actually cause asthma attacks or if asthma and food allergies are both manifestations of a severe allergic profile. They speculated that food-allergic reactions might be triggered in some people with asthma only when combined with strenuous exercise.

Overall, the researchers estimate that 2.5 percent or 7.5 million Americans have food allergies. This estimate is lower than some estimates, but in line with many others. This study's analysis of actual IgE antibody levels to foods in a large nationally representative sample lent authority to the results. However, since the tests measure potential allergies to only four of the most commonly allergenic foods, the results may slightly underestimate overall prevalence of food allergies, wrote the authors.

Children ages 1 to 19 were twice as likely to have food allergies as the general population. Non-Hispanic blacks were three times as likely to have food allergies, and males were twice as likely to have food allergies. Black male children were 4.4 times as likely to have food allergies.

Peanut allergy was the most common food allergy, affecting 1.3 percent of the surveyed population. Contrary to milk and egg allergies, which peaked in children under 5, peanut allergies were highest among children ages 6 to 19 (2.7 percent).

National Jewish Health is known worldwide for treatment of patients with respiratory, cardiac, immune and related disorders, and for groundbreaking medical research. Founded in 1899 as a nonprofit hospital, National Jewish remains the only facility in the world dedicated exclusively to these disorders. Since 1998, U.S. News & World Report has ranked National Jewish the #1 respiratory hospital in the nation.

William Allstetter | EurekAlert!
Further information:
http://www.njhealth.org

More articles from Health and Medicine:

nachricht Using fragment-based approaches to discover new antibiotics
21.06.2018 | SLAS (Society for Laboratory Automation and Screening)

nachricht Scientists learn more about how gene linked to autism affects brain
19.06.2018 | Cincinnati Children's Hospital Medical Center

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

What are the effects of coral reef marine protected areas?

21.06.2018 | Life Sciences

The Janus head of the South Asian monsoon

21.06.2018 | Earth Sciences

The world's tiniest first responders

21.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>