CRP and peritonitis: The serum creatinine level of the gram-negative bacteria group was lower (p = .006) than that in the gram-positive bacteria group, but the effluent WCC on the first day of peritonitis was higher, the time required for the WCC to normalize was longer, and the level of C-reactive protein (CRP) was higher in the gram-negative bacteria group (p < .05) than in the gram-positive bacteria group, as shown in Table 6.