The study of Aslan et al. on 92 children with UTI (case group) and 105 healthy children (control group) showed that VDR gene Fok1 ff genotype is associated with 3.94 times greater risk of UTI and renal scar formation than FF genotype, while Apa1 Aa or aa genotype seem to be protective factors (110). This evidence concerns the gene VDR and bacterial urinary tract infection.