CRP and anaphylaxis: However, the fact that the patient had experienced three similar episodes with hemoconcentration (but no shock symptoms) before, the presence of low inflammatory parameters (C-reactive protein, 2.3mg/dL; leukocytes, 14G/L), absence of a clinically obvious infectious focus and no potential allergen exposition made sepsis and anaphylaxis extremely improbable causes of shock in our patient.