The skin has many major roles in cat’s life: protection of outside aggression of course but not only. Temperature regulation, moisture retaining, elimination of sebum excess and release of pheromones involved in territorial marking, social and sexual communication are other important function of the skin. The skin barrier is essential to protect the body from allergens, bacteria, yeasts and all other offenders out there.
To be efficient, the skin barrier protection relies on 3 components which interact:
The mechanical skin barrier: basically cells and skin components acting like a ‘brick and mortar’ wall allowing to keep water in and offenders out.
The immunological skin barrier: cells and molecules that defends the body against offenders. As skin is an interface with the external environment, the immune system is very active.
The microbiological skin barrier: there are many microorganism that live on the skin surface (bacteria, yeasts, etc.). This balanced barrier protect from invasion of pathogen microorganisms.