Fig. 4.

Double combination of ciprofloxacin (CIP) and polymorphonuclear cells (PMNs). Concentration-effect data and regression lines of CIP alone, PMNs alone, the double combination CIP+PMNs, and the Bliss independence theoretical combination CIP+PMNs if CIP and PMNs act independently. Ciprofloxacin did not exhibit a direct effect on Aspergillus growth and did not significantly alter the antifungal activity of PMNs. The open triangle next to the y axis corresponds to 0 μg/ml of ciprofloxacin, but it was shifted to the right for visualization purposes.