CD79A and bacterial infectious disease with sepsis: In a pediatric Nigerian cohort, LPS and HlyE-specific IgA provided good discrimination between S. Typhi cases and controls with other bacteremias; the receiver operator characteristic (ROC) area under the curve (AUC) for LPS-specific IgA was 0.90 and somewhat lower for HlyE-specific IgA (AUC 0.74) (12).