Source Pravda.Ru

Researchers Reconsider the Hygiene Theory

        A study of 4,000 children over eight years has found that the 'hygiene theory', which says that who are exposed to common diseases and play with other youngsters are less likely to develop allergies, is probably wrong. 

   Some people have believed that wrapping children in cotton wool, extensive use of household detergents and obsessive cleanliness has led to an increase in allergies.

     Lead author Dr Johan C de Jongste, of Erasmus University in the Netherlands said: "We found no evidence for a protective or harmful effect of day care on the development of asthma symptoms, allergic sensitisation or airway hyper-responsiveness at the age of eight years.

   "Early day care was associated with more airway symptoms until the age of four and only in children without older siblings, with a transient decrease in symptoms between four and eight years."

   The findings are published in the American Journal of Respiratory and Critical Care Medicine.

   Parents completed detailed questionnaires during pregnancy, at three months and one year and then annually until the child reached the age of eight, with answers on their child's day care and symptoms.

    Children who started day care before the age of two were twice as likely to have wheezing in the first year of life than those who did not go to day care.

   By the age of five the trend was no longer statistically significant and by the age of eight there was no link found between day care and wheezing.

   Those who started day care later showed a similar but non-significant trend and there was no difference between boys and girls in the study.

   Children who went to day care early and had older brothers or sisters wheezed the most, the study found, Telegraph.co.uk. reports 

  

Comments
Ukraine suspicious about Russia's intention to give away rusty ships to Kiev
Keys to understanding the world from Feminism - Science and Feminism
You're invited to death penalty: Barbaric traditions of world's most progressive states
Russia's new torpedo carrying 100-megaton nuclear warhead nullifies USA's Prompt Global Strike
Russia's new torpedo carrying 100-megaton nuclear warhead nullifies USA's Prompt Global Strike
Russian poultry stuffed with antibiotics and dangerous bacteria
Americans declassify plans to drop 466 nuclear bombs on USSR
Russia's new torpedo carrying 100-megaton nuclear warhead nullifies USA's Prompt Global Strike
Russia's and China's gold may end global domination of US dollar
Unveiled: Secret Pentagon UFO program. From science fiction to science fact
Russian poultry stuffed with antibiotics and dangerous bacteria
Russia eyes opportunity to restore all Soviet bases that had to be abandoned after 1991
Call girl dies of asphyxia in bizarre sexual encounter
Call girl dies of asphyxia in bizarre sexual encounter
Call girl dies of asphyxia in bizarre sexual encounter
German experts name Russia's most dangerous weapon
Russia to impose sanctions on WADA for Winter Olympics 2018
Russian Guard to see enemies behind walls
What will happen if USA freezes Russian dollar assets?
Ukraine suspicious about Russia's intention to give away rusty ships to Kiev
Russian Armed Forces to receive second-to-none gliding bomb