Nisin in Meat and Poultry Products
Application in Meat and Poultry Products: Inhibiting Pathogens and Reducing Spoilage
Meat and poultry products (e.g., fresh meat, cooked ham, sausages) are prone to contamination by pathogens (e.g., Listeria monocytogenes, Staphylococcus aureus) and spoilage bacteria (e.g., Bacillus species), leading to short shelf life and safety risks. Nisin addresses these issues through targeted antibacterial action:
Key Applications & Mechanisms
Fresh meat (beef, pork, chicken):
Method: Spray or soak fresh meat in a 0.1–0.2 g/L Nisin solution before packaging, or incorporate Nisin into edible coatings (e.g., chitosan-Nisin composite coating).
Effect: Inhibits the growth of surface pathogens (e.g., Listeria) and aerobic spoilage bacteria. For example, chilled pork treated with Nisin has a shelf life extended from 3–5 days to 7–10 days at 4°C, with no significant changes in color, texture, or flavor.
Cooked meat products (ham, sausages, canned meat):
Method: Add 0.05–0.1 g/kg Nisin directly to meat emulsions during processing, or combine with mild heat treatment (e.g., 80°C for 15 minutes).
Effect: Prevents post-sterilization "recontamination" by heat-resistant bacterial spores (e.g., Clostridium botulinum). Canned ham with Nisin avoids "swelling" caused by bacterial fermentation, and its shelf life at room temperature extends from 6 months to 12 months.
Advantage
Reduces reliance on chemical preservatives (e.g., nitrites) and high-temperature sterilization, avoiding nitrite residues and overcooking-induced texture loss (e.g., tough ham).
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