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Table 1 Geometric means of antibody levels against serogroups A, C, W135, and Y

From: Persistence of antibodies in laboratory staff immunized with quadrivalent meningococcal polysaccharide vaccine

  A C W135 Y
SBA GMT 256.0 598.8 97.0 531.0
≥ 8 (%) 19 (95.0%) 18 (94.7%) 13 (65.0%) 19 (95.0%)
IgG GMC (μg/ml) 17.4 4.9 2.1 2.4
≥ 2 μg/ml (%) 20 (100.0%) 13 (68.4%) 8 (40.0%) 8 (40.0%)
  1. SBA: serum bactericidal assay; IgG: Immunoglobulin G; GMT: geometric mean titer; GMC: geometric mean concentration in μg/ml.