2014). A low diversity in the Bacteroides genus at the first month of life was associated with IgE-mediated atopic eczema during the first 2 years (Abrahamsson et al. 2012). Another study found that the Bacteroidetes were 3-fold less abundant in infants with eczema at 18 months (Nylund et al. 2013). The Bacteroides genus was also found to be underrepresented in infants with IgE-mediated food allergies (Ling et al. 2014). Here, IGHE is linked to food allergy.