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The microbiology of transmissible murine colonic hyperplasia
Abstract:
The relationship of Citrobacter freundii (4280) to the development of colonic hyperplasia in mice was investigated. The number of Citrobacter freundii (4280) in the descending colon were quantitated at intervals following experimental inoculation, and findings were correlated with previously reported histological and ultrastructural findings. Citrobacter freundii (4280) was a transient infection, lasting 2-3 weeks, after which time mice no longer harbored the organism. Neomycin sulfate and tetracycline hydrochloride, when administered in the drinking water, were useful in the prevention of infection as well as ablation of established infection. The presence of Citrobacter freundii (4280) for as little as 2 days was sufficient stimulus to result in detectable mucosal hyperplasia. The longer the bacterium was present, through 10 days, the greater the hyperplasia.
Insights
Citrobacter freundii (4280) can cause colonic hyperplasia in mice. Even short-term presence of this bacterium stimulates significant mucosal hyperplasia, with longer exposure increasing the severity.
Area of Science:
- Microbiology
- Gastroenterology
- Pathology
Background:
- Citrobacter freundii (4280) is a bacterium that has been investigated for its role in gastrointestinal conditions.
- Colonic hyperplasia is an increase in the number of cells in the colon lining, which can be a precursor to other issues.
Purpose of the Study:
- To investigate the relationship between Citrobacter freundii (4280) and the development of colonic hyperplasia in a mouse model.
- To determine the duration of infection and its correlation with hyperplasia.
Main Methods:
- Experimental inoculation of mice with Citrobacter freundii (4280).
- Quantitation of bacterial numbers in the descending colon at various time points.
- Correlation of bacterial presence with histological and ultrastructural findings of mucosal hyperplasia.
Main Results:
- Citrobacter freundii (4280) infection was transient, lasting approximately 2-3 weeks.
- As little as 2 days of bacterial presence was sufficient to induce detectable mucosal hyperplasia.
- Prolonged presence of the bacterium (up to 10 days) resulted in progressively greater hyperplasia.
- Neomycin sulfate and tetracycline hydrochloride were effective in preventing and treating the infection.
Conclusions:
- Citrobacter freundii (4280) can act as a stimulus for colonic mucosal hyperplasia in mice.
- The duration of exposure to Citrobacter freundii (4280) directly correlates with the severity of hyperplasia.
- Antibiotic treatment can prevent and clear Citrobacter freundii (4280) infections.