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

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Nuno F. Azevedo (Author) FEUP

Journal

Title: Applied and Environmental Microbiology

Vol. 70 No. 1

Pages: 490-493

ISSN: 0099-2240

Publisher: American Society for Microbiology

Scientific classification

FOS: Natural sciences > Biological sciences

Other information

DOI: 10.1128/AEM.70.1.490-493.2004

Abstract (EN): 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% CO(2), 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4