Therefore, more specific markers are required in the detection and follow-up of infections.5 Procalcitonin (PCT) is a 116 amino acid glycopeptide produced by C cells of the thyroid gland under normal conditions and is a precursor to calcitonin.6,7 It is known that serum PCT levels increase significantly in cases of sepsis and severe invasive bacterial infections and decrease rapidly with appropriate antibiotic treatment. This evidence concerns the gene CALCA and Sepsis.