Objective: To investigate the efficacy of serum procalcitonin( PCT) and endotoxin( ET)in diagnosis,antibiotic using and condition assessment of elderly patients with sepsis. Methods: 60 elderly patients with sepsis and bacterial infection( non- sepsis) from emergency ward and ICU served as sepsis group and infectious group,while choosing the same period of hospitalized 30 patients with non- infectious diseases as the control group. PCT and ET levels were detected in three groups within24 hours,3 d and 7 d a...