Table 5.

Dose-response functions and morbidity values selected for the Giardia, Cryptosporidium, Campylobacter, E. coli O157 and norovirus models

Pathogen	Dose response and morbidity	Reference
Giardia	Exponential, r = 0·0199 Pill/inf = Uniform distribution (0·2–0·7)	Rose et al. [82] USEPA [22]
Cryptosporidium	Exponential, r = 0·018 Pill/inf = Uniform distribution (0·2–0·7)	Messner et al. [83] USEPA [22]
Campylobacter	Exact beta-Poisson (α = 0·1453, β = 8·007) Pill/inf = Uniform distribution (0·1–0·6)	Schmidt et al. [84] USEPA [22]
E. coli O157	Approx. beta-Poisson (α = 0·4, β = 37·6) Pill/inf = Uniform distribution (0·2–0·6)	Median of 10 000 iterations by Teunis et al. [85]; Bielaszewska et al. [86] USEPA, [22]
Norovirus*	Exact beta-Poisson (α = 0·04, β = 0·055) Pill/inf = Uniform distribution (0·3–0·8)	Teunis et al. [87] USEPA [21]

^*It was assumed that the entire population lacks immunity to norovirus.