云南省食源性沙门菌血清分型及脉冲场凝胶电泳的指纹图谱

目的 研究云南省食源性沙门菌的血清型, 用脉冲场凝胶电泳 (PFGE) 方法对优势血清型进行分子分型, 建立云南省食源性沙门菌PFGE指纹图谱资料库, 为食源性疾病溯源提供数据.方法 对2013年至2016年从云南省食源性疾病监测中分离到的322株食源性沙门菌进行血清学分型, 采用Bio Numerics软件对148株沙门菌DNA酶切图谱进行类聚分析, 通过聚类比较分析菌株间的相关性, 建立指纹图谱库.结果 322株沙门菌血清分型主要包括A、B、C、D、E、F、G群等7个群, 鼠伤寒沙门氏菌是主要血清型, 占11.4% (37/322) .采用Bio Numerics软件对148株沙门菌DNA酶切图谱进行类聚分析, 根据电泳产生条带的位置和数量的不同, 共分为102个不同的PFGE带型.按照90%的相似度, 这些PFGE带型可以分为39个大小不一的聚类群, 呈现多样性.结论 云南省食源性沙门菌分子分型复杂, 以鼠伤寒沙门氏菌为主, PFGE带型呈现多样性.

Serotyping and PFGE Type of Salmonella Isolates in Yunnan Province

Objective To study the serotypes and molecular characteristics of foodborne Salmonella in Yunnan Province using pulsed field gel electrophoresis (PFGE) and to establish PFGE fingerprint database.Methods This study was carried out on the basis of the Serological typing of 322 strains of foodborne Salmonella which was isolated from Yunnan national foodborne disease surveillance from 2013 to 2016. The clustering analysis was conducted on 148 strains of Salmonella DNA restriction enzyme map by using the software of Bio Numerics. Fingerprint database was established through the comparison of clustering analysis correlation on bacterial strain. Results The serotype of 322 strains of Salmonella mainly included A, B, C, D, E, F, G and other 7 groups, among which Salmonella typhimurium was the major type, accounting for 11.4% (37/322) . Cluster analysis was applied using Bio Numerics software in 148 strains of Salmonella DNA restriction enzyme map.According to the different number and the different positions, electrophoresis strips were divided into 102 different PFGE patterns (Figure 1) , which was categorized into 39 clusters if 90% of the strips was similar. Conclusion Foodborne salmonella molecular classification is complex. Salmonella typhimurium is the major type. PFGE belt type presents diversity.