Navigation Links
Day Care May Not Shield Kids From Asthma, Allergies
Date:9/9/2009

Study debunks 'hygiene hypothesis' that early exposures boost immune response

WEDNESDAY, Sept. 9 (HealthDay News) -- Early day care, so the story goes, exposes kids to more germs and illnesses at an early age, thereby protecting them from asthma and allergies later on.

Scientists call it the ''hygiene hypothesis," but a new study casts doubt on its existence and finds early infections have no effect on asthma and allergy rates at age 8.

An unexplained increase in asthma among children in both industrialized countries and developing nations has scientists searching for ways to reduce the disease. In the United States, asthma affects nearly 5 million children and is the most common serious chronic childhood disease, according to the American Academy of Allergy, Asthma & Immunology.

Dutch researchers followed more than 3,600 children from birth through 8 years, noting their daycare use and health problems, such as wheezing. Those who started daycare early were twice as likely to experience wheezing in their first year as those who didn't attend daycare.

By age 5, however, the early daycare kids -- who started from birth to age 2 -- had less wheezing than the kids who didn't go, the researchers found.

But three years later, the discrepancy disappeared. "We found no evidence for any protection for asthma, allergy and airway hyper-responsiveness at 8 years," said Dr. Johan C. de Jongste, professor of pediatric respiratory medicine at Erasmus University Medical Center in the Netherlands, who led the study.

The researchers examined annual parental reports that asked about symptoms. Other assessments included blood tests to measure IgE, antibodies typically elevated in a person with allergies. They tested for lung function and hyper-responsiveness of the airways, and they controlled for such factors as a mother's allergies.

Would the results for Dutch children hold in the United States? "The study population was a reasonable reflection of the Dutch general population, including rural and urban areas, so white children with a western European lifestyle," de Jongste wrote in an e-mail interview. "This should not be very different from U.S. children who live under comparable conditions."

The bottom line? Early exposure to germs and other organisms does cause more symptoms early in a child's life, but without a counterbalancing health benefit later on, as was previously believed. The children had an increase in airway symptoms until age 4, an overall decrease from age 4 to 8, but no protection at age 8 compared to those who weren't in daycare.

The study is published in the Sept. 15 issue of the American Journal of Respiratory and Critical Care Medicine.

The study is considered a "landmark investigation" by Dr. John Heffner, past president of the American Thoracic Society. In a prepared statement, Heffner said that the investigation "is the first to follow children prospectively from birth to 8 years and assess the effect of daycare enrollment on both asthma symptoms and immunologic evidence of allergic disease."

Heffner added: "This study provides strong evidence that enrollment in daycare provides no protection against asthma and cannot be promoted as a public health strategy to decrease asthma prevalence."

De Jongste said parents should consider daycare for many other reasons, however. "Daycare may serve many purposes, including social contacts and enabling both parents to work," he said.

More information

To learn more about childhood asthma, visit the American Academy of Allergy, Asthma & Immunology.



SOURCES: Johan C. de Jongste, M.D., Ph.D., professor, pediatric respiratory medicine, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands; John Heffner, M.D., Portland, Ore., past president, American Thoracic Society; Sept. 15, 2009, American Journal of Respiratory and Critical Care Medicine


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Anthem Blue Cross and Blue Shield in Wisconsin Harnesses Social Media to Interact with Members
2. Blue Cross Blue Shield of Georgia Offers The Healing Book to Help Young Life Insurance Beneficiaries Cope with Losing a Loved One
3. Statement About Legendary Detroit Tigers Broadcaster Ernie Harwell From Blue Cross Blue Shield of Michigan
4. Blue Shield of California Streamlines Access to Benefits and Prescriptions for Wildfire Victims
5. Blue Cross Blue Shield of Georgia offers The Healing Book to Help Young Life Insurance Beneficiaries Cope with the Loss of a Loved One
6. Empire Blue Cross Blue Shield Awarded NCQAs Accreditation Status of Excellent
7. WDIV-TV, Blue Cross Blue Shield of Michigan and The Parade Company Help Launch The Biggest Loser: Detroit Edition
8. Celebrity Link to Type 1 Diabetes Further Connects the Juvenile Diabetes Research Foundations Georgia Chapter and Blue Cross and Blue Shield of Georgia
9. Paul S. Boulis, President, Blue Cross and Blue Shield of Illinois, Announces His Retirement
10. Karen M. Atwood Named President of Blue Cross and Blue Shield of Illinois
11. vProtect Luminal Shield (TM) from Prescient Medical Receives CE Mark
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Day Care May Not Shield Kids From Asthma, Allergies
(Date:7/20/2017)... ... July 19, 2017 , ... Dr. Jig Patel is pleased to announce openings ... without a referral. Understanding the difficulties that face people who are missing teeth ... permanent alternative to removable dentures and bridges. Not only does an implant improve oral ...
(Date:7/20/2017)... ... 19, 2017 , ... Western University of Health Sciences College ... grant to train predoctoral dental students in providing care to vulnerable children ages ... , The Predoctoral Pediatric Training Project (PPTP), a five-year grant, recognizes the curriculum ...
(Date:7/20/2017)... ... July 19, 2017 , ... A July ... lead to, or worsen, varicose veins in some patients, according to medical experts. ... certain not-so-good practices, like excessive sitting or standing, or regularly nicking yourself while ...
(Date:7/18/2017)... ... 2017 , ... CannaKids, a California Cooperative Cooperation that specializes in the creation ... WORLDZ Summit, taking place in Hollywood from July 31-August 1, the Company’s Founder ... for both pediatric and adult patients, and how the path has led her to ...
(Date:7/18/2017)... , ... July 18, 2017 , ... The results of an international clinical trial, led ... therapy for a severe type of muscular dystrophy holds promise for a subgroup of patients. ... Craig McDonald and colleagues at 53 study sites in 18 countries describe the clinical ...
Breaking Medicine News(10 mins):
(Date:7/12/2017)... , July 12, 2017 CarpalAID is a revolutionary new ... or surgery. Carpal tunnel syndrome affects more than 8 ... twice the rate of men. The common methods of treating CTS ... with uncomfortable hand braces or gloves. ... CarpalAID is a clear patch worn ...
(Date:7/11/2017)... July 11, 2017  Sysmex America, Inc., a ... testing equipment as well as middleware information systems ... to make quality assurance easier and more risk ... well known for the innovation that it delivers ... elevates quality assurance processes to a new level ...
(Date:7/10/2017)...  BDI Group subsidiary Pathway Purchasing Network, a ... serving specialty pharmacies, home infusion companies and physician ... value-added member programs designed to help organizations gain ... improve access and affordability for patients who rely ... Pathway has worked with ...
Breaking Medicine Technology: