IL37 and infection: Though we did not detect IL-12p70 and IL-12p35 mRNA expression was not induced by infection with Salmonella, one should bear in mind that the detection limit of the IL-12p70 ELISA used was 3 pg/ml and that we can not exclude that the effect observed after neutralizing the IL-23 is due to the neutralization of small, undetectable amounts of IL-12p70.