英文摘要 |
Salmonella enterica serovars Typhimurium, Typhi, and Enteritidis are serious food pathogens which may cause human disease and/or animal infections. In an attempt to elucidate the clonal relationship in each of these species, to find the most disseminated and recirculating strains in food poisoning cases, and to discern the possible transmission of these strains from different origins and areas, we have used phage typing, antibiograms and molecular typing methods, such as plasmid profiles, pulsed field gel electrophoresis (PFGE), and random amplified polymorphic DNA (RAPD) to identify subtypes of these Salmonella strains. The results showed that in Salmonella Typhimurium and Typhi strains, considerable genetic diversity were found while in S. Enteritidis, high genetic similarity was observed. Also possibly, the most disseminated and recirculating strains of S. Typhimurium and S. Enteritidis were identified. Strains of these common subtypes might be the most prevalent strains and transmission of strains between different areas and origins might be possible.
鼠傷寒、傷寒及腸炎血清型沙門氏桿菌是重要之食品病原菌,可造成人類疾病及(或)動物之感染,欲瞭解個別血清型內菌株之種源關係和找出分佈最廣及食品中毒案件中重複出現之菌株,以及這些菌株在不同分離源及地區之可能轉移,我們利用噬菌體分型,抗生素圖譜及分子分類之方法,如質體圖譜(plasmid profile)、脈衝式電場膠體電泳(PFGE)及隨機擴大多型性DNA分析(RAPD),以鑑定沙門氏菌之次分型。結果發現鼠傷寒沙門氏菌或傷寒沙門氏菌血清型內之各菌株,其基因型有相當的多樣性。然而,腸炎沙門氏菌血清型的菌株有高度的基因相似性。此外,鼠傷寒及腸炎沙門氏菌血清型中之食品中毒案件中最常見之菌株,也可被確認出,這些菌株在不同來源及地區間,可能是優勢菌株,而不同地區、不同分離源間菌株的轉移是可能的。 |