方法：采集83例86眼婴幼儿泪囊炎患者的泪囊分泌物进行细菌培养和药敏试验分析。

结果：患者86眼中，84眼细菌培养阳性，阳性率为97.7%，共分离出细菌94株，其中革兰氏阳性菌67株，占71.3%，革兰氏阳性菌的前三位敏感药物为利福平、左氧氟沙星、氯霉素； 革兰氏阴性菌27株，占28.7%，革兰氏阴性菌前三位敏感药物为左氧氟沙星、氯霉素、夫西地酸、头孢他啶。

结论：G⁺菌为婴幼儿泪囊炎的优势致病菌，其中以草绿色链球菌和表皮葡萄球菌最常见。G⁺菌较G^-菌耐药性高，左氧氟沙星、氯霉素等治疗婴幼儿泪囊炎有效。

METHODS: Lacrimal sac secretions from 83 infants(86 eyes)with dacryocystitis were used to do bacterial cultures and drug sensitivity tests.

RESULTS:In all 86 eyes, specimens of 84 eyes were positive in bacterial culture, and the pathogenic bacteria positive rate was 97.7%. Totally 94 bacterial strains were isolated from lacrimal sac secretions. The positive rates of gram-positive bacteria were 71.3%(67 strains)and gram-positive bacteria were sensitive to rifampicin, levofloxacin and chloramphenicol. The positive rates of gram-negative bacteria were 28.7%(27 strains), and gram-negative bacteria were sensitive to levofloxacin, chloramphenicol, fusidic acid and ceftazidime.

CONCLUSION: Gram-positive bacteria are the preponderant pathogenic bacteria of dacryocystitis in infants, and the most common of which are streptococcus viridans and staphylococcus epidermidis. The results of drug sensitivity tests show that drug resistance rate of gram-positive bacteria are higher than that of gram-negative bacteria. Levofloxacin and chloramphenicol are effective to infants with dacryocystitis.