CRP and pneumonia: Several studies have found procalcitonin (PCT) levels to predict blood culture results in patients with pneumonia,9–13 urinary tract infections,14 sepsis,15 and acute febrile illness.16 Similar data are available for C-reactive protein (CRP),13,17 neutrophil-lymphocyte count ratio (NLCR),18 and lymphocytopenia,18,19 with significant differences in levels of these biomarkers between bacteremic patients and patients with negative blood cultures.