
The first line of defence
Skin mucus serves as a first line of defence against pathogens and external stressors. As well as acting as a physical barrier, it contributes to the antioxidant defense system responsible for protecting the surrounding and underlying tissues.
Antioxidative protection
When the fish faces a challenge, the immune cells produce free radicals, which can lead to cell damage. In challenge situations, Protec can provide cells with additional antioxidative protection.
Safeguarding the fish
Lysozymes are enzymes that form part of the innate immunity: they are an important line of defence in case of an infection because of their antibacterial activity. Lysozymes have the capacity to lyse the cell wall of bacteria. An increase in lysozyme activity has been observed in fish fed Protec.