The results of multivariate analysis (with n = 1288) indicated that 11 predictors were associated with bacteremia: age ≥ 65 years old, chills, vomiting, altered mental status, temperature ≥ 38°C, systolic blood pressure < 90 mm Hg, focal abdominal sign, white blood cell count ≥ 15,000/μL, platelets < 150,000/μL, BUN ≥ 20 mg/dL, and CRP ≥ 10 mg/dL. The gene discussed is CRP; the disease is bacterial infectious disease with sepsis.