Relationship between the presence of newborn and the house dust endotoxin

► The exposure to house dust endotoxin is a risk of airways' inflammation. ► There are few data on the environmental source of endotoxin. ► Human, in particular the newborn, could release endotoxin. ► The endotoxin concentration of the mattresses increased after 6 months of life. ► Therefore the newborn could be a source of house dust's endotoxin.