title: Behaviour ofListeria MonocytogenesandEscherichia ColiO157:H7 During the Cheese Making of Traditional Raw-Milk Cheeses from Italian Alps.
abstract: The behaviour ofListeria monocytogenesandEscherichia coliO157:H7 was studied during the manufacture and ripening of two traditional Italian Alps cheeses. Each cheese type was manufactured in a pilot plan from raw cow milk (without the addition of starter cultures) artificially inoculated withL. monocytogenesandE. coliO157:H7 to a final concentration of about 4 log CFU/mL. The pathogens were enumerated throughout the cheese making and ripening processes to study their behaviour. When the milk was inoculated with 4 Log CFU/mL, the pathogens counts increased in the first time during the manufacturing process and then remained constant, until the end of ripening, or decreased significantly. Results indicate that the environment and nature of food borne pathogens affected the concentration of the bacteria during the manufacturing and ripening process. Thus, the presence of low cells numbers ofL. monocytogenesandE. coliO157:H7 in milk destined for the production of raw milk cheeses characterized by a cooking of the curd less than 48°C can constitute a hazard for the consumer.
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Elena
authors: E
authors: Cosciani-Cunico
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Elena
authors: E
authors: Dalzini
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Stefania
authors: S
authors: Ducoli
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Chiara
authors: C
authors: Sfameni
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Barbara
authors: B
authors: Bertasi
authors: Veterinary Public Health Institute of Lombardy and Emilia Romagna , Brescia, Italy.
authors: Marina-Nadia
authors: MN
authors: Losio
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Paolo
authors: P
authors: Daminelli
authors: Department of Food Microbiology, Veterinary Public Health Institute of Lombardy and Emilia Romagna Brescia , Brescia, Italy.
authors: Giorgio
authors: G
authors: Varisco