Matsushita S, Yamada S, Kai A, Kudoh Y
Department of Microbiology, Tokyo Metropolitan Research Laboratory of Public Health, Japan.
J Clin Microbiol. 1993 Nov;31(11):3034-5. doi: 10.1128/jcm.31.11.3034-3035.1993.
Ten strains of Escherichia coli isolated from 10 travellers with sporadic diarrhea who were returning to Tokyo, Japan, from abroad were found to be of serotype O121:NM and were positive in the Serény test for invasiveness; this suggests that this serotype can cause a shigellosis-like illness in humans. The E. coli O121:NM strains were positive in the cell invasion test in HeLa cells. Analysis of the plasmid content of these strains showed that they contained a high-molecular-mass plasmid of 120 to 140 MDa which has been associated with invasiveness and were positive in an enzyme-linked immunosorbent assay for detection of the virulence plasmid-encoded proteins of Shigella spp. and enteroinvasive E. coli.
从10名从国外返回日本东京且患有散发性腹泻的旅行者身上分离出的10株大肠杆菌,被鉴定为O121:NM血清型,并且在用于检测侵袭性的塞内试验中呈阳性;这表明该血清型可在人类中引起志贺氏菌病样疾病。O121:NM大肠杆菌菌株在HeLa细胞的细胞侵袭试验中呈阳性。对这些菌株的质粒含量分析表明,它们含有一个120至140 MDa的高分子量质粒,该质粒与侵袭性有关,并且在用于检测志贺氏菌属和肠侵袭性大肠杆菌的毒力质粒编码蛋白的酶联免疫吸附试验中呈阳性。