CALCA and Candidemia: In fact, the two systems employed at the same time and on the same serum sample of two out of six infants with candidemia (patients no. 4 and 5) highlight negative or slightly positive values respectively, posing a problem for the evaluation of PCT and interpretation of data: no fungal sepsis could be suspected for the infants no. 4 and 5 at time T3 if we consider the PCT values obtained by method A (0.44 and 0.22 ng/mL, respectively), but a doubt appears in the same patients if we consider the PCT value obtained by method B (0.68 and 0.57 ng/mL, respectively).