http://news.yahoo.com/s/nm/20090422/od_uk_nm/oukoe_uk_asthma_lice
The study, published in the BioMed Central journal BMC Biology, adds to evidence supporting the so-called hygiene hypothesis, which holds that the rise in asthma and allergies can be linked to hyper-clean living.
The idea is that if the immune system is not properly primed in childhood, immune cells can improperly react to harmless triggers such as pollen or bits of dander. Bacterial and viral infections do not seem to be the priming factor, but researchers have been focussing lately on parasites.
The study, published in the BioMed Central journal BMC Biology, adds to evidence supporting the so-called hygiene hypothesis, which holds that the rise in asthma and allergies can be linked to hyper-clean living.
The idea is that if the immune system is not properly primed in childhood, immune cells can improperly react to harmless triggers such as pollen or bits of dander. Bacterial and viral infections do not seem to be the priming factor, but researchers have been focussing lately on parasites.