Correlation Between Immunoglobulin Dose Administered and Plasma Neutralization of Streptococcal Superantigens in

Helena Bergsten1, Martin Bruun Madsen2, Francois Bergey3

  • 1Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Huddinge, Stockholm, Sweden.

Analyses of plasma collected pre- and postadministration of intravenous immunoglobulin (IVIG) from patients with group A Streptococcus necrotizing soft tissue infections demonstrated a negative correlation between IVIG dose and toxin-triggered T-cell proliferation (r = -.67, P < .0001). One 25-g IVIG dose was sufficient to yield plasma-neutralizing activity against streptococcal superantigens. Clinical Trials Registration. NCT01790698 and NCT02111161.