Table 1. The simulation model and formulas in a Microsoft Excel^® spreadsheet used to calculate the risk of illness of Escherichia coli in natural cheese by means of the @RISK software

Input Model	Unit	Code	Formula	References
PRODUCT
Product
Pathogen Contamination
level
Non-EHEC E. coli		PR	=RiskBeta(1,91)	Vose (1998)
prevalence		PR	=RiskBeta(1,91)	Vose (1998)
Concentration	CFU/g	C	=RiskUniform(0,2)	Vose (1998)
Initial contamination level	CFU/g	IC	=PR×C	Vose (1998)
	Log CFU/g	log(IC)	=log(PR×C)
TRANSPORTATION
Transportation time	h	time_trans	=RiskPert(1,3,6)	Personal communication^a
Food temperature	°C	temp_trans	=RiskPert(0,4,10)	Personal communication^a
during transportation	°C	temp_trans	=RiskPert(0,4,10)	Personal communication^a