Impermeabilitet og/ eller resistens, som påvirker mekanismen af efflukspumpen for den aktive substans, kan have forskellig virkning på følsomheden over for fluoroquinoloner, hvilket afhænger af de fysiokemiske egenskaber hos forskellige aktive substanser inden for klassen og affiniteten af transportsystemerne for hver aktiv substans.
Impermeability and/or active substance efflux pump mechanisms of resistance may have a variable effect on susceptibility to fluoroquinolones, which depends on the physiochemical properties of the various active substances within the class and the affinity of transport systems for each active substance.