Figure 2.

Bacterial supernatants induce the secretion of IL-8 by PMN. Neutrophils were incubated at 5 × 10⁶/ml overnight in medium alone or with supernatants of antibiotic-exposed bacteria. The IL-8 content was measured by ELISA. The results are mean ± SD of three to eight experiments. Significant differences between treated and non-treated cultures are indicated (Kruskal-Wallis test, Dunns test). FLU20 = flucloxacillin 20 × MIC; FLU1 = flucloxacillin 1 × MIC; ERY20 = erythromycin 20 × MIC; ERY1 = erythromycin 1 × MIC; CIP20 = ciprofloxacin 20 × MIC; CIP1 = ciprofloxacin 1 × MIC; GEN20 = gentamicin 20 × MIC; GEN1 = gentamicin 1 × MIC.