A newly discovered verotoxin variant, VT2g, produced by bovine verocytotoxigenic Escherichia coli

被引：81

作者：

Leung, PHM

Peiris, JSM

Ng, WWS

Robins-Browne, RM

Bettelheim, KA

Yam, WC ^{[1
]}

机构：

[1] Univ Hong Kong, Queen Mary Hosp, Dept Microbiol, Hong Kong, Hong Kong, Peoples R China

[2] Univ Hong Kong, Sch Prof & Continuing Educ, Hong Kong, Hong Kong, Peoples R China

[3] Univ Melbourne, Dept Microbiol & Immunol, Parkville, Vic 3010, Australia

来源：

APPLIED AND ENVIRONMENTAL MICROBIOLOGY | 2003年 / 69卷 / 12期

关键词：

D O I：

10.1128/AEM.69.12.7549-7553.2003

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

A new verotoxin (VT) variant, designated vt2g, was identified from a bovine strain of verocytotoxigenic Escherichia coli (VTEC) serotype O2:H25. When vt2g was aligned with published sequences of vt2 and vt variants, it exhibited the highest DNA sequence homology with vt2 and vt2c. However, vt2g was not detected by vt2-specific primers and probes, although it was partially neutralized by an antiserum to the VT2A subunit. VT2g was cytotoxic for Vero and HeLa cells and was not activated by mouse intestinal mucus. The vt2g gene was detected in 3 of 409 (0.7%) bovine VTEC strains, including serotypes O2:H25, O2:H45 and Ont:H-.

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页码：7549 / 7553

页数：5

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