Procalcitonin > 0.9 ng/mL can be a critical marker for identifying bacterial infection in #SLE. Single center study of 116 juv. SLE pts dx bacterial infx in 17%. Procalcitonin was signif better than others: NLR, PLR, ESR, CRP, LC4R, ferritin (cut offs need to be defined) https://t.co/NAM8xopNW5