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Dalzini E.,National Reference Center for Emerging Risk in Food Safety | Cosciani-Cunico E.,National Reference Center for Emerging Risk in Food Safety | Bernini V.,University of Parma | Bertasi B.,Istituto Zooprofilattico Sperimentale della Lombardia e dellEmilia Romagna B. Ubertini | And 3 more authors.
Food Control | Year: 2015

The aim of this study was to evaluate the behaviour of Escherichia coli, Salmonella Typhimurium and Listeria monocytogenes in an innovative semi-dry reduced fat Italian salami. The product is made from pork meat and it is characterized by less than 20% fat, lactose-, gluten- and milk protein-free. It is developed in Italy according to EC Regulation No. 1924/2006 "on nutrition and health claims made on foods". Multi-strain cocktails of each pathogen were used to inoculate (5logcfug-1) separately the salami batter. During the manufacture and ripening, E. coli, S. Typhimurium, and L. monocytogenes decreased by 2.5, 1.65 and 0.5logcfug-1 respectively from the initial inoculated levels. Experimental data indicated that, during the shelf life in a condition of moderate thermal abuse (8-12°C), the portioned and vacuum packed low fat salami are not able to support the growth of L.monocytogenes. © 2014 Elsevier Ltd. Source


Dalzini E.,National Reference Center for Emerging Risk in Food Safety | Bernini V.,University of Parma | Bertasi B.,Istituto Zooprofilattico Sperimentale della Lombardia e dellEmilia Romagna B. Ubertini | Daminelli P.,National Reference Center for Emerging Risk in Food Safety | And 2 more authors.
Food Control | Year: 2016

Listeria monocytogenes is an important food-borne pathogen causing meningitis, meningo-encephalitis and abortion. Both sporadic and epidemic human listeriosis cases are associated with the consumption of contaminated foods. To assess the potential risk to consumer health, the presence of L. monocytogenes was investigated using qualitative and quantitative methods in raw milk (bulk tank milk and milk for vending machine) collected from 2010 to 2013 in Northern Italy (Lombardy and Emilia-Romagna regions). Overall, L. monocytogenes was detected in 145 on 8716 of raw milk samples, with a prevalence of 1.66% (95% C.I. 1.4%-1.7%). The prevalence ranged from 0.52% (95% C.I. 0.3%-0.9%) in 2012 to 2.7% (95% C.I. 2.0%-3.8%) in 2013, but no trend of increase was observed in four-years of investigation. The pathogen was detected from 2.2% (95% C.I. 1.9%-2.6%) of bulk tank milk and from 0.5% (95% C.I. 0.3%-0.8%) of milk for vending machine. A significative difference (p < 0.05) of the prevalence data was observed between data collected in two different regions of Northern Italy with an higher prevalence in Lombardy. In addition to the geographical area, the L. monocytogenes presence was influenced also by the seasonal period of collection samples, with peaks in spring and autumn. These results confirm the raw milk can be a source of foodborne illness outbreaks if consumed without sanitizing treatments, but the low prevalence and the low contamination levels (more than 80% of the contaminated samples contained <10 cfu ml-l of L. monocytogenes) proving the hygienic quality of the milk produced in Northern Italy. © 2015 Elsevier Ltd. Source

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