The skin plays many important roles in a cat’s life: it protects against external aggressions, but that’s not all. It also regulates temperature, retains moisture, eliminates excess sebum, and releases pheromones involved in territorial marking as well as social and sexual communication. The skin barrier is essential for protecting the body from allergens, bacteria, yeasts, and other potential irritants.
To be efficient, the skin barrier protection relies on 3 components which interact:
The mechanical skin barrier: essentially the cells and skin components act like a ‘brick and mortar’ wall, allowing water in while keeping 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 provides protection from invasion of pathogen microorganisms.