期刊
GUT PATHOGENS
卷 3, 期 -, 页码 -出版社
BMC
DOI: 10.1186/1757-4749-3-5
关键词
Genotyping Helicobacter pylori; biopsy specimens; bacterial cultures
资金
- US National Institutes of Health [RO3-AI061308]
- Medical Research Council Laboratories, The Gambia
- MRC [MC_U190092710, MC_U190081991, MC_U190074190, G0700837] Funding Source: UKRI
- Medical Research Council [G0700837, MC_U190074190, MC_U190081991, MC_U190092710] Funding Source: researchfish
Background: Helicobacter pylori is an important agent of gastroduodenal disease in Africa and throughout the world. We sought to determine an optimum method for genotyping H. pylori strains from children and adults in The Gambia, West Africa. Results: Virulence genes were amplified in 127 of 190 cases tested (121 adults and 6 children); each of 60 bacterial cultures, and 116 from DNA extracted directly from biopsies. The proportion of biopsies that were cagA+, the ratio of vacAs1/s2, and vacAm1/m2, and the proportion of mixed strain populations in individual subjects changed with age. Strains lacking virulence cagA and vacA genes and with apparently homogeneous (one predominant strain) infections were more common among infants than adults. Conclusions: In order to detect the range of bacterial genotypes harbored by individual patients, direct PCR proved slightly superior to isolation of H. pylori by biopsy culture, but the techniques were complementary, and the combination of both culture and direct PCR produced the most complete picture. The seemingly higher virulence of strains from adult than infant infections in The Gambia merits further analysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据