FGF2 and infection: However, in the aPDT treatment group and the aPDT + antibiotic group, bFGF expression first increased and then decreased, being highest at 10 days post-infection among the timepoints that we measured: 99.7 ± 9.3 in the aPDT + antibiotic treatment group and 91.0 ± 7.3 in the aPDT group.