Nutrient shock and incubation atmosphere influence recovery of culturable Helicobacter pylori from water

被引:33
作者
Azevedo, NF
Pacheco, AP
Keevil, CW
Vieira, MJ [1 ]
机构
[1] Univ Minho, Ctr Engn Biol, P-4700057 Braga, Portugal
[2] Univ Southampton, Sch Biol Sci, Environm Healthcare Unit, Southampton SO9 5NH, Hants, England
关键词
D O I
10.1128/AEM.70.1.490-493.2004
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
Three different media-Columbia agar, Wilkins-Chalgren agar, and Helicobacter pylori special peptone agar-were prepared in a diluted version and compared to the standard medium formulation in order to study a possible nutrient shock effect observed when recovering H. pylori from water by counting the number of CFU. This same parameter was subsequently used to evaluate the influence of the incubation atmosphere by using a modular atmosphere-controlled system to provide different atmospheres and by employing an established gas generation kit as a control. Both a low nutrient content of the media and a rapidly achieved microaerophilic incubation atmosphere proved to increase the numbers of environment-stressed H. pylori organisms recovered. An atmosphere of 5% CO2 5% O-2 and 3% H-2 is recommended, although other atmospheres with a low oxygen concentration are also acceptable. Besides highlighting and assessing the importance of several factors in the culturability of H. pylori, this paper demonstrates the potential ability to develop an optimized technique for recovery of this pathogen from water.
引用
收藏
页码:490 / 493
页数:4
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