Evolution of the Helicobacter pylori vacuolating cytotoxin in a human stomach

被引:18
|
作者
Aviles-Jimenez, F
Letley, DP
Gonzalez-Valencia, G
Salama, N
Torres, J
Atherton, JC [1 ]
机构
[1] Univ Nottingham Hosp, Wolfson Digest Dis Ctr, Nottingham NG7 2UH, England
[2] Univ Nottingham Hosp, Inst Infect Immun & Inflammat, Nottingham NG7 2UH, England
[3] IMSS, Mexico City, DF, Mexico
[4] Fred Hutchinson Canc Res Ctr, Human Biol Div, Seattle, WA 98104 USA
关键词
D O I
10.1128/jb.186.15.5182-5185.2004
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
We describe two subclones of Helicobacter pylori, isolated contemporaneously from a human stomach, which differ markedly in the vacuolating cytotoxin gene, vacA, but whose near identity in sequences outside this locus implies a very recent common origin. The differences are consistent with homologous recombination with DNA from another strain and result in a changed vacA midregion and, importantly, in changed toxicity.
引用
收藏
页码:5182 / 5185
页数:4
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