Mazzette, Rina and Colleo, Maria Maddalena and Riu, Giovanni and Piras, Gabriella and Piras, Francesca and Addis, Margherita and Pes, Massimo and Pirisi, Antonio and Meloni, Domenico and Mureddu, Anna and Spada, Salvatore and Fiori, Myriam and Coinu, Marco and Lentini, Andrea (2010) Produzione di "Casu Marzu" in condizioni controllate: valutazione dell'effetto della colonizzazione da Piophila casei sulle caratteristiche microbiologiche e chimiche dei formaggi = Production under controlled conditions of “casu marzu” cheese: effect of the Piophila casei colonization on microbial and chemical composition of the cheeses. Italian Journal of Food Safety = Rivista dell'Associazione Italiana dei Veterinari Igienisti, Vol. 7 , p. 45-54. ISSN 1974-8620. eISSN 2239-7132. Article.
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The aim of the present study was to evaluate the effect of the Piophila casei colonization under controlled conditions on “casu marzu”, a typical Sardinian sheep milk cheese. Three batches of two different kind of cheese (PO, holed paste and PC, firm paste) were produced in duplicate (test and control). Test cheeses were exposed to the Piophila casei colonization in a conditioned store room, while control cheeses were suitably protected. All the samples were analyzed at 0, 10, 30, 60 and 90 days from the production. The pH and aw, the chemical composition and the microbiological parameters (food safety and process hygiene criteria) were determined. The colonization was unhomogeneous between the batches: PO cheeses were more easily colonized and showed more intense proteolysis and lipolysis respect to PC cheeses. The microbiological parameters were strongly affected by the experimental process conditions. The authors discuss about the opportunity of a controlled production of “casu marzu” and the implications to the health of consumers.
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