For patients with neutropenia who did not have systemic infection (group2), that is, those who were diagnosed with FUO or localized infection presented low concentrations of PCT (0,08–2,15) that were highly significant (p = 0,0003) and CRP concentrations that did not greatly differ statistically from those found in group 1 (19,5–546,0) (p = 0,9198). The gene discussed is CALCA; the disease is neutropenia.