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通过一种市售酶联免疫测定法鉴定产热稳定肠毒素STA的大肠杆菌,并将该测定法与幼鼠试验和DNA探针试验进行比较。

Identification of Escherichia coli that produces heat-stable enterotoxin STA by a commercially available enzyme-linked immunoassay and comparison of the assay with infant mouse and DNA probe tests.

作者信息

Scotland S M, Willshaw G A, Said B, Smith H R, Rowe B

机构信息

Division of Enteric Pathogens, Central Public Health Laboratory, London, England.

出版信息

J Clin Microbiol. 1989 Jul;27(7):1697-9. doi: 10.1128/jcm.27.7.1697-1699.1989.

Abstract

By using the infant mouse test and a commercially available competitive enzyme-linked immunosorbent assay (ELISA), 100 strains of Escherichia coli carrying STA1 or STA2 genes were shown to produce the heat-stable enterotoxin STA. An additional 100 strains were negative in both tests. The ELISA was easy to perform, and results were available within 24 h. Testing strains with an enzyme-linked DNA probe kit that incorporated both STA1- and STA2-specific oligonucleotides showed that the 100 strains positive in the mouse test and ELISA also hybridized with the mixed probe. Two strains carrying STA1 genes but negative in the mouse test and ELISA also hybridized with the mixed probe.

摘要

通过使用幼鼠试验和市售的竞争性酶联免疫吸附测定(ELISA),结果显示携带STA1或STA2基因的100株大肠杆菌可产生热稳定肠毒素STA。另外100株在两种试验中均呈阴性。ELISA操作简便,24小时内即可获得结果。用包含STA1和STA2特异性寡核苷酸的酶联DNA探针试剂盒检测菌株,结果表明在小鼠试验和ELISA中呈阳性的100株菌株也能与混合探针杂交。两株携带STA1基因但在小鼠试验和ELISA中呈阴性的菌株也能与混合探针杂交。

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