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Characteristic faecal flora of NC mice
Laboratory Animals
|January 1, 1985
Summary
Mouse strain genetics significantly influence gut microbiota composition. NC mice exhibit distinct fecal flora patterns, with lower levels of key bacteria compared to CF #1 mice, indicating a genetic basis for gut microbial colonization.
Area of Science:
- Microbiology
- Genetics
- Gastroenterology
Background:
- The gut microbiome plays a crucial role in host health.
- Understanding host-microbe interactions is vital for deciphering physiological processes.
- Strain-specific differences in gut flora composition are increasingly recognized.
Purpose of the Study:
- To investigate the influence of host genetics on the composition of fecal flora in mice.
- To compare the gut microbial colonization patterns between NC and CF #1 mouse strains.
- To determine if genetic factors dictate the establishment of specific bacterial populations.
Main Methods:
- Germfree (GF) mice of NC and CF #1 strains were colonized with conventional (CV) mouse flora via cage-mating or hysterectomy-derived foster rearing.
- GF mice were mono-associated with specific Lactobacillus and Bifidobacterium strains.
- Bacterial populations in the gastrointestinal tract were quantified and compared between mouse strains.
Main Results:
- Ex-GF mice fecal flora composition was dependent on the recipient mouse strain, irrespective of donor bacteria.
- NC mice consistently showed lower numbers of Lactobacillus and Bifidobacterium in the stomach and intestines compared to CF #1 mice.
- Strain-specific patterns of fecal flora were observed even when pups were fostered to different strains.
Conclusions:
- The composition of fecal flora in NC mice is genetically determined.
- Genetic factors influence the colonization efficiency of specific gut bacteria, such as Lactobacillus and Bifidobacterium.
- Differences in gut microbial communities between mouse strains are attributable to inherent genetic variations.