Figure 1

PMN acquire an activated cell shape after exposure to bacterial supernatants. PMN (5 × 10⁶/ml) were incubated overnight in medium alone (A) or in supernatants of S. aureus exposed to flucloxacillin 20 × MIC (B), erythromycin 20 × MIC (C), gentamicin 20 × MIC (D), ciprofloxacin 1 × MIC (E) or ciprofloxacin 20 × MIC (F). Elongated cell morphology (arrows) is a sign for activation of PMN (original magnification 200 ×).