Febrile seizures (FS) are the most common cause of seizures in children. The exact etiopathogenesis is unknown but involves factors like genetic predisposition and alterations in the levels of neurotransmitters and some trace elements. The study includes 48 consecutive children with FS, and 55 healthy age matched control subjects. Calcium, magnesium and potassium concentrations in the febrile study group were lower than in the control group (p<0.05). Iron and Gallium levels in the study group were lower than in the control group (p<0.01). Serum Selenium (p<0.001), Zinc (p<0.001) and Strontium (p<0.05) levels were significantly decreased in the study group when compared to the control group. There was no significant difference between the control and study groups in Serum Barium, Beryllium and Copper levels (p>0.05). The aim of the present prospective analytical case-control study was to determine whether there was any change in element levels in children with FS (Ref. 33). Full Text in PDF www.elis.sk.