Effect of ceftriaxone (CTX) and ceftriaxone plus azithromycin (CTX+AZM) on plasma GSH (A), plasma MPO (B), and lung MPO (C) levels in mice that underwent CLP. Vehicle (saline), ceftriaxone (100 mg/kg s.c.), or ceftriaxone (100 mg/kg s.c.) plus azithromycin (100 mg/kg i.p.) was administered 3 h after CLP, and plasma GSH and plasma and lung MPO levels were measured after 18 h of CLP. Data are expressed as the mean ± SEM (n = 8). #, P < 0.05 for significance versus the sham-treated group; ##, P < 0.01 for significance versus the sham-treated group; ###, P < 0.001 for significance versus the sham-treated group; *, P < 0.05 for significance versus the CLP group; **, P < 0.01 for significance versus the CLP group.