Related Experiment Videos
Experimental Helicobacter pylori infection in association with other bacteria
H Isogai1, E Isogai, S Hayashi
1Institute of Animal Experimentation, Sapporo Medical University, Hokkaido, Japan.
Abstract:
We performed surgical treatment on normal ddY mice before Helicobacter pylori inoculation. The treatment was expected to obstruct bacterial flow out of the stomach and increase the chance of bacterial attachment to the gastric epithelium in mice. The bacterial challenge induced inflammation in the stomach. H. pylori was recovered from the stomach throughout the observation period. Lactobacilli and streptococci tended to relate to the increase in number of H. pylori recovered. Pretreatment with atropine was considered to confuse the gastric flora and affect the number of H. pylori recovered. These results suggested that a certain amount of time is necessary for H. pylori to contact with the gastric epithelium and that the composition of flora is important for the establishment of H. pylori infection.
Insights
Surgical intervention in mice increased Helicobacter pylori attachment and infection. Gastric flora composition significantly impacts H. pylori establishment and recovery.
Area of Science:
- Gastroenterology
- Microbiology
- Animal Models
Background:
- Helicobacter pylori is a significant human pathogen.
- Understanding factors influencing H. pylori colonization is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the impact of surgical manipulation on H. pylori gastric colonization in mice.
- To explore the role of gastric flora in H. pylori infection establishment.
Main Methods:
- Surgical treatment was performed on ddY mice prior to H. pylori inoculation.
- Mice were monitored for H. pylori recovery and gastric inflammation.
- Gastric flora composition was analyzed in relation to H. pylori load.
Main Results:
- Surgical treatment obstructed gastric outflow, enhancing H. pylori attachment to the gastric epithelium.
- H. pylori was consistently recovered from the stomach post-inoculation.
- Increased populations of Lactobacilli and streptococci correlated with higher H. pylori recovery.
- Atropine pretreatment altered gastric flora and affected H. pylori recovery.
Conclusions:
- Sufficient time for H. pylori to interact with the gastric epithelium is necessary for infection.
- Gastric microflora composition plays a critical role in the successful establishment of H. pylori infections.