Our CCU group displayed an increased proportion of circulating granulocytes, along with lower mean CpG site methylation and increased expression of FUT4 (encoding the enzyme fucosyltransferase 4, which catalyzes the synthesis of the granulocyte marker CD15) and of MPO, encoding myeloperoxidase, which is released by activated neutrophils at the site of infection [50]. This evidence concerns the gene FUT4 and infection.