The patients with R017 infections had a higher mean Charlson’s comorbidity index (OR 1.1, 1–1.21, p = 0.05), lower serum albumin (OR 0.47, 0.31–0.73, p = 0.001) and lower CRP levels (OR 0.96, 0.92–0.99, p = 0.022) than those with other ribotypes. This evidence concerns the gene CRP and infection.