Related Experiment Videos
[Digestive and cutaneous colonization of Staphylococcus epidermidis in hairless axenic mice]
Abstract:
In order to determine the cutaneous and digestive colonization of S. epidermidis in germ-free HRS mice, several groups of animals were contaminated with this strain according to different methods. The bacterial cutaneous enumerations were performed after preliminary crushing of the cutaneous biopsy. In this study, whatever the method of contamination of germ-free HRS mice, the kinetics of S. epidermidis cutaneous colonization was parallel to the kinetics of intestinal colonization. The isolation of bacteria on skin was possible only when microorganisms were eliminated in faeces (6 h after contamination). During a single experiment, there was only slight variability in colonization, whether intestinal or cutaneous. Some differences could be found from one experiment to another, but all animals in the same trial showed the same cutaneous bacterial count. This experimental model is characterized by an interrelation between the intestinal and cutaneous ecosystems.
Insights
This study shows that Staphylococcus epidermidis colonization on mouse skin mirrors intestinal colonization. This finding highlights the interconnectedness of skin and gut microbial ecosystems in a mouse model.
Area of Science:
- Microbiology
- Dermatology
- Gastroenterology
Context:
- Investigating Staphylococcus epidermidis (S. epidermidis) colonization in germ-free HRS mice.
- Utilizing various contamination methods to assess bacterial distribution.
- Focusing on the relationship between cutaneous and digestive tract colonization.
Purpose:
- To determine the patterns of S. epidermidis colonization on the skin and in the digestive system of germ-free mice.
- To analyze the kinetics and variability of S. epidermidis colonization across different experimental conditions.
- To establish the link between intestinal and cutaneous microbial ecosystems.
Summary:
- Germ-free HRS mice were contaminated with S. epidermidis via different methods.
- Cutaneous and intestinal colonization kinetics of S. epidermidis were found to be parallel.
- Bacterial isolation from skin was feasible only after fecal elimination (6 hours post-contamination).
- Colonization showed low variability within experiments but some inter-experiment differences.
- A strong interrelation between intestinal and cutaneous ecosystems was observed.
Impact:
- Provides a reproducible experimental model for studying skin-gut microbial interactions.
- Enhances understanding of S. epidermidis's role in host-microbe dynamics.
- Suggests potential for targeting intestinal colonization to influence skin microbiota.