Jersek B, Gilot P, Gubina M, Klun N, Mehle J, Tcherneva E, Rijpens N, Herman L
Centre of Agricultural Research, Department of Animal Product Quality (DVK), B-9090 Melle, Belgium.
J Clin Microbiol. 1999 Jan;37(1):103-9. doi: 10.1128/JCM.37.1.103-109.1999.
Listeria monocytogenes strains possess short repetitive extragenic palindromic (REP) elements and enterobacterial repetitive intergenic consensus (ERIC) sequences. We used repetitive element sequence-based PCR (rep-PCR) to evaluate the potential of REP and ERIC elements for typing L. monocytogenes strains isolated from humans, animals, and foods. On the basis of rep-PCR fingerprints, L. monocytogenes strains were divided into four major clusters matching origin of isolation. rep-PCR fingerprints of human and animal isolates were different from those of food isolates. Computer evaluation of rep-PCR fingerprints allowed discrimination among the tested serotypes 1/2a, 1/2b, 1/2c, 3b, and 4b within each major cluster. The index of discrimination calculated for 52 epidemiologically unrelated isolates of L. monocytogenes was 0.98 for REP- and ERIC-PCR. Our results suggest that rep-PCR can provide an alternative method for L. monocytogenes typing.
单核细胞增生李斯特菌菌株具有短的重复基因外回文序列(REP)和肠杆菌重复基因间共有序列(ERIC)。我们使用基于重复元件序列的聚合酶链反应(rep-PCR)来评估REP和ERIC元件用于对从人、动物和食品中分离出的单核细胞增生李斯特菌菌株进行分型的潜力。基于rep-PCR指纹图谱,单核细胞增生李斯特菌菌株被分为四个主要簇,与分离来源相匹配。人和动物分离株的rep-PCR指纹图谱与食品分离株的不同。对rep-PCR指纹图谱的计算机评估允许在每个主要簇内区分测试的血清型1/2a、1/2b、1/2c、3b和4b。对52株流行病学上不相关的单核细胞增生李斯特菌分离株计算的REP-PCR和ERIC-PCR的鉴别指数为0.98。我们的结果表明,rep-PCR可为单核细胞增生李斯特菌分型提供一种替代方法。