【摘要】 目的初步探讨阴道内产H2O2能力不同的乳酸杆菌对大肠杆菌的拮抗作用及拮抗机制,以期筛选菌株用于治疗女性泌尿生殖道感染。方法从阴道分泌物中分离筛选出产H2O2的乳酸杆菌,通过比浊法判断各菌产H2O2的能力,采用打孔法测量各菌对大肠杆菌产生的抑菌圈直径。结果从阴道共分离出4株产H2O2菌株,其中L.paracasei3和L.acidophilus1产生H2O2的能力较强;L.acidophilus1产生的抑菌作用最大,L.crispatus次之。结论不同乳酸杆菌产H2O2能力不同,对大肠杆菌的体外拮抗作用亦不同,L.acidophilus1和L.crispatus的拮抗作用较强,此拮抗作用不完全依赖细菌产生的H2O2和乳酸。更多还原

【Abstract】 Objective To investigate the different ability to produce H₂O₂₊ of the vaginal lactobacilli and their potential antagonism toward E.coli in ivtro.Then to select the potential lactobacilli strain to treat the female urogenital infection.Method To detect production of H₂O₂ by measuring the blue matter in water solution with absorbtion spectrophotometry.The lactobacillus and E.coli were cultured together in solid culture medium,followed by the measurement of inhibition zone around the lactobacilli after 24 hour.Results We selected 4 strains of lactobacilli from vagina.L.acidophilus1 and L.paracasei3 are the stronger to produce H₂O₂.The largest diameter of the ring of inhibition is shown around the lactobacilli acidophilus 1.Conclusion The lactobacilli acidophilus 1 and lactobacilli crispatus are the most potential strains as antagonist to E.coli and their antagonism depend not only on lacid or H₂O₂.更多还原