<prompt> All the following cephalosporins have significant activity against Pseudomonas Species exceptCefoperazoneCeftazidimeCefotaximeCefepime  <response>: CephalosporinsActivity against PseudomonasCefoperazoneSome activityCeftazidimeMost activeCefotaximeNo activityCefepimeReasonable activityRef:Harrisons 17e p952, 18e p1269, table 152-2 