【摘要】 在系统鉴定、药敏试验和血清型鉴定的基础上 ,对 2 3株致病性大肠杆菌和 5株标准血清型大肠杆菌进行了质粒DNA分析。结果表明 ,菌株的质粒获得率为 1 0 0 % ,来源相同的菌株具有相同或相似的质粒图谱 ,来源不同的菌株具有不同的质粒图谱。质粒图谱与血清型及耐药谱之间无明显关系。更多还原

【Abstract】 pathogenic E coli strains and 5 standardized E coli strains were studied by plasmid DNA analysis on the basis of systematic identification ,drug resistance test and O serogroup identification Plasmids were discovered in all E coli strains Plasmid profile analysis indicated that the isolates from different sources had distinct plasmid patterns, while those from same sources held same plasmids There was no remarkable relations between plasmid profile and O serogroup and drug resistance of E coli strains更多还原