Organism to be modelled4°C/low temp range20°C/high temp range E.coli*T 90 = 70-100 daysT 90 = 15-35 days Enterococci*T 90 = 100-200 daysSame as 4°C BacteriophagesT 90 = 20-200 daysT 90 = 10-100 days Salmonella*T 90 = 10-50 days EHEC*T 90 = 10-30 daysSame as 4°C Rotavirusconservative model – no reduction T 90 = 100-300 days T 90 = 20-100 days GiardiaT 90 = 15-100 daysT 90 = 5-50 days CryptosporidiumT 90 = 30-200 daysT 90 = 20-120 days AscarisT 90 = 100-400 daysT 90 = 50-200 days *Possible growth not taken into consideration Inactivation of microorganisms in faeces ( Arnbjerg-Nielsen et al.