2.4.2. Microbiological stability of refrigerated Port Salut cheese
Changes in psychrotrophic bacteria, Listeria spp. and total yeasts and moulds, microbial groups that commonly cause spoilage in Port Salut cheese, were measured during storage at refrigerated tem- perature. Briefly, pieces of cheese (2.5 2.5 0.5 cm; 5 ± 0.3 g) were cut with a sterile knife and placed on sterile petri dishes. Squares (5 cm side) from the different films (CF, CNANI and NANI) were cut and used to cover the cheese and also a cheese without film (CH) was evaluated. The samples were incubated at 7 ± 1 C for 22 days.