Multiple logistic regression analysis showed that elevated levels of MRP8/14 (log10 OR = 5.5, 95% CI = 3.1–9.6), CRP (log10 OR = 2.4, 95% CI = 1.3–4.1), and HNE (log10 OR = 2.3, 95% CI = 1.3–4.0) were predictive of acute KD over an infection (p < 0.001). This evidence concerns the gene S100A8 and infection.