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Efficient Stool Collection Methods for Evaluating the Diarrhea Score in Mouse Diarrhea Models
Sung Kyun Yim1,2, Sang Wook Kim1,2, Soo Teik Lee3,2
1Division of Gastroenterology and Hepatology, Department of Internal Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Republic of Korea.
Background/Aim:
The mouse diarrhea score is usually determined by evaluating stool consistency and shape. Thus, defecated stools should be collected without damage or contamination. The study aimed to develop improved mouse stool collection methods and diarrhea-scoring criteria.
Materials And Methods:
We developed improved stool collection methods (paper towel methods) and compared them with previously used ones (stool collection using regular cages containing bedding chips or filter paper and metabolic cages).
Results:
Compared to previously used methods, paper towel methods collected stools without bedding chips-induced contamination, mouse body/foot-induced damage, or sampling errors. When using paper towel methods, wet stools create water marks (diarrhea marks) on paper towels with strong water absorption capacity, by which diarrheal severity can be analyzed semi-quantitatively. To improve the objectivity in determining diarrhea scores, practical diarrhea-scoring criteria were also proposed.
Conclusion:
These results would be helpful to researchers facing difficulties in evaluating the mouse diarrhea score.
Insights
Improved mouse stool collection methods using paper towels enhance accuracy and reduce contamination. Novel diarrhea scoring criteria offer more objective evaluations for researchers.
Area of Science:
- Veterinary Medicine
- Animal Models
- Preclinical Research
Background:
- Accurate assessment of mouse diarrhea is crucial for research.
- Traditional stool collection methods often lead to contamination and damage.
- Existing diarrhea scoring criteria lack objectivity.
Purpose of the Study:
- To develop improved mouse stool collection techniques.
- To establish objective criteria for scoring mouse diarrhea.
- To enhance the reliability of diarrhea assessment in preclinical studies.
Main Methods:
- Development of a novel paper towel method for stool collection.
- Comparison of the paper towel method with traditional methods (regular cages, metabolic cages).
- Introduction of practical, semi-quantitative diarrhea-scoring criteria based on observed marks.
Main Results:
- The paper towel method effectively prevented contamination from bedding chips and damage from mice.
- Sampling errors were reduced compared to conventional methods.
- Diarrhea marks on absorbent paper towels allowed for semi-quantitative assessment of severity.
- Proposed scoring criteria improved the objectivity of diarrhea evaluation.
Conclusions:
- The developed paper towel method and scoring criteria offer a more reliable approach to assessing mouse diarrhea.
- These improvements will aid researchers in obtaining more accurate and reproducible data.
- The findings address a significant challenge in preclinical research involving mouse models.
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