However, PCT values were significantly higher in immunocompromised than in immunocompetent patients, at 1.85 μg/l (95% CI 0.67 to 4.70 μg/l) versus 0.61 μg/l (95% CI 0.38 to 1.10 μg/l; P = 0.005), respectively, for patients with bacterial/parasitic infection, and 0.26 μg/l (95% CI 0.15 to 0.5 μg/l) versus 0.11 (95% CI 0.05 to 0.14; P = 0.01) for patients without bacterial/parasitic infection. The gene discussed is CALCA; the disease is parasitic infectious disease.