Figure 2. Geometric mean IgG titers in serum from children with cystic fibrosis.
For those subjects that experienced pulmonary exacerbation during the study period, titers are measured during exacerbation and at follow-up (1-3 months). For LukA, alpha toxin and LukS-PV, geometric mean titers (GMT) were significantly higher if S. aureus was detected at the time of exacerbation (p<0.01 for each comparison; Mann-Whitney U test). For LukA only, GMTs were significantly higher at exacerbation follow-up compared to titers during the exacerbation (p<0.05, Wilcoxon signed-rank test).