At day 5 after infection, massive infiltrations of CD11b+Siglec-F–F4/80–CD64– neutrophils/DC (polymorphonuclear neutrophil/DC [PMN/DC]) and CD11b+Siglec-F+F4/80+CD64– eosinophils (Eos), as well as increased numbers of CD64+CD11b–Siglec-F+F4/80+ AMФ and CD64+CD11b+Siglec-F–F4/80+ interstitial macrophages (IMФ) were noted in mice treated with ciprofloxacin (Figure 6, C and D). The gene discussed is FCGR1A; the disease is infection.