[A multicenter study of a new Helicobacter pylori selective medium. Columbia horse blood agar HP].

This research explores the effectiveness of a new selective culture medium, Columbia Horse Blood Agar HP (CHBHP), for the growth and isolation of a bacterium called Helicobacter pylori. The study finds CHBHP to be a cost-effective and highly efficient medium for H. pylori cultivation in the laboratory setting.

Study Methodology

Investigations were conducted at three different Japanese clinical laboratories located in Hokkaido, Kanto, and Kyusyu. The new CHBHP medium was compared against traditional selective and nonselective media. The aspects compared were:

• The recovery rate of H. pylori on various media.
• The size of the colonies formed on these different media.
• The success rate of H. pylori detection in positive specimens.
• The effectiveness of CHBHP on specimens derived from H. pylori-infected animals.

Main Findings

Electing CHBHP as a medium for cultivating H. pylori showed promising results:

• The colony size on the CHBHP medium was notably larger than on other media. This increased size may contribute to easier detection and study of the bacteria.
• The H. pylori detection rate using CHBHP ranged from 98.1% to 100%, surpassing the detection rate of the other media conventionally used (88.0% to 96.2%).
• The CHBHP media demonstrated a higher detection rate also when using specimens from H. pylori-infected animals. This outcome widens its application from clinical to research scenarios involving infected animal models.

Cost and Efficiency Comparison

The new CHBHP medium showed superior performance in cultivating H. pylori, and it also offered financial benefits:

• The CHBHP medium eliminates the need for combining with non-selective media for growth and isolation of H. pylori, leading to lower overall costs.

In conclusion, the new CHBHP medium proves remarkably effective for the selective culture and isolation of H. pylori, excelling in both performance and cost efficiency compared to the conventional selective and nonselective media. This makes it a useful tool in both clinical and research settings involving H. pylori.