Abstract： Objective To analyze the etiology trends,etiological characteristics treatment effects of endophthalmitis in 10 years which from 2000 to 2009 in our hospital.Methods 165 patients (172 eyes) of endophthalmitis in hospital from January 2000 to December 2009 were enrolled in this study.The patients included 122 males and 43 females.The median age was (39.0 ± 23.7) years.The best visual acuity (BCVA) was non light perception in 16 eyes,light perception 0.05 in 135 eyes,＞0.05 in 12 eyes.Nine children did not have visual acuity records.There were 141 patients (85.45％) with exogenous endophthalmitis which including 89 patients of trauma,43 patients after intraocular surgery and nine others;24 patients (14.55％) with endogenous endophthalmitis.113 eyes were received intravitreal injection with vancomycin 0.1 ml (10 mg/ml).152 eyes had pathogenic microorganisms culture records of aqueous humor or aqueous humor and vitreous.The positive records were given drug sensitivity test.The types of endophthalmitis,pathogenic microbial culture and drug sensitivity test results and treatment effects were analyzed.Software of SPSS was used for the clinical data statistical analysis in this study.Results Of 152 eyes with a record of aqueous/vitreous samples pathogenic bacteria culture,42 eyes (27.63％) had a positive result.In which,28 eyes showed positive in bacteria culture,12 eyes was positive in fungus culture and two eyes had a positive in culture of fungus and bacteria growing.The culture positive rate was higher in exogenous endophthalmitis than that in endogenous endophthalmitis (x2 =4.721 9,P=0.029 8).Most of the G+ positive bacteria were resistance to cephalosporin and quinolones except levofloxacin; but sensitive to vancomycin,rifampin and sulfamethoxazole.The intervention effect was more available for postoperative endophthalmitis than that for traumatic endophthalmitis and endogenous endophthalmitis,the difference was statistically significant(x2 =38.941 3,P=0.000 0).The BCVA of 23 cases was ＞0.05 after the treatment,compared with before the treatment,the difference was statistically significant (x2 =3.867 3,P=0.049 2).Compared the ratio of past five years' to that of recent five years,endogenous endophthalmitis was increased from 7.89％ to 20.23％ (x2 =5.014 0,P =0.025 1); postoperative endophthalmitis decreased from27.63％ to 24.72％,and traumatic endophthalmitis decreased from 60.53％ to 48.31％,other causes linked endophthalmitis raised from 3.95 ％ to 6.74％.Conclusions In recent 10 years (from 2000 to 2009),the patients with endogenous endophthalmitis are growing.The positive rate of pathogenic agent culture is low,but the culture positive rate of the specimens from endogenous endophthalmitis is higher than that from exogenous endophthalmitis.The treatment was more available for postoperative endophthalmitis than that for other two types of endophthalmitis.The general visual prognosis is poor.