title: Behaviour ofListeria Monocytogenesin Artisanal Raw MilkPecorino UmbroCheese: A Microbiological Challenge Test.
abstract: In the present study, a microbiological challenge test in artificially contaminated raw milkPecorino Umbrocheese during cheese-making was carried out. Raw ewe milk was contaminated by a suspension of particularListeria monocytogenesstrains. The number ofL. monocytogenesandL. monocytogenesdynamic growth were evaluated during cheese-making and storage. A significant decrease of the viable count ofL. monocytogeneswas observed during ripening andL. monocytogenesviable count was below the limit of quantification during storage. The results show that the product is unable to support the growth of the pathogen.
authors: Institute for Experimental Veterinary Medicine of Umbria and Marche , Perugia, Italy.
authors: Roberta
authors: R
authors: Ortenzi
authors: Department of Veterinary Medicine, University of Perugia , Italy.
authors: Raffaella
authors: R
authors: Branciari
authors: Institute for Experimental Veterinary Medicine of Umbria and Marche , Perugia, Italy.
authors: Sara
authors: S
authors: Primavilla
authors: Department of Veterinary Medicine, University of Perugia , Italy.
authors: David
authors: D
authors: Ranucci
authors: Institute for Experimental Veterinary Medicine of Umbria and Marche , Perugia, Italy.
authors: Andrea
authors: A
authors: Valiani
keywords: Ewe cheese; Listeria monocytogenes; Microbiological challeng test