The authors recorded that elevated levels of IL-6, IL-1 RA and IL-10 were also found in the CSF of patients with FS, but CSF IL-6 levels were detectable in all studied patients with FS. Straussberg et al. reported an increase in the production of IL-1b, IL-6, and IL-10 cytokines by lipopolysaccharide-stimulated mononuclear cells from individuals of 13 children with history of febrile seizures and 11 controls, but the secretion of IL-6 and IL-10 in response to lipopolysaccharide was higher in those with a previous history of convulsions [28]. This evidence concerns the gene IL6 and Feingold syndrome.