Cryptosporidium Contamination and Attributed Risks in Yunlong Lake in Xuzhou, China

Table 1

Model parameters for risk assessment of Cryptosporidium.

Variable description (unit)	Mean
January average oocysts concentration, sites 1–12 (per 100 L)	25
March average oocysts concentration, sites 1–12 (per 100 L)	15
July average oocysts concentration, sites 1–12 (per 100 L)	33
August average oocysts concentration, sites 1–12 (per 100 L)	30
November average oocysts concentration, sites 1–12 (per 100 L)	26
Water ingestion volume by swimming in the lake (mL/time)	37
Water ingestion volume by diving in the lake (mL/time)	13
Percentage of exposure swimmers (%)	16.05
Percentage of exposure divers (%)	2.1
Infectivity of annual exposures for swimming (times)	20
Infectivity of annual exposures for diving (times)	19.82
Probability of illness given infection	0.5