Table 3.

Calculation of the probability of becoming infected (P_inf) during summer for three waterborne pathogens detected in river waters.

Microorganism	Swimmers	Pinf (%)			Equation Model
		Site A	Site B	Site C
C. parvum	Adult	0.002	0.001	<0.001	(1)
		0.010	0.003	<0.001	(2)
	Child	0.005	0.002	<0.001	(1)
		0.023	0.008	<0.002	(2)
G. duodenalis	Adult	0.013	0.019	0.013	(1)
		0.064	0.096	0.064	(2)
	Child	0.029	0.044	0.029	(1)
		0.147	0.221	0.147	(2)
Adenovirus	Adult	0.904	1.194	4.616	(1)
		4.438	5.831	21.046	(2)
	Child	2.078	2.740	10.353	(1)
		9.965	12.971	42.100	(2)

Notes: (1) For one-time bathing; (2) For five bathing episodes.