TABLE 1.

Estimated first-order degradation coefficients^a

Temp	Fitted model	Model significance	Parameter significance
4 and 30°C	k = 0.003 · bars − 0.004 · Temp	P < 0.001	Temp, P < 0.001; Bars, P = 0.003
−14°C	k = 0.013 · bars	P = 0.001	Bars, P = 0.001
Freeze-thaw cycling (−14 to 10°C)	k = 0.055 · bars	P < 0.001	Bars, P < 0.001

^aStatistics are related to significance of regression models to estimate k (degradation coefficient used to represent exponential rate of decay of oocyst populations: n₃/n₁ = e^kt) and coefficient estimates for temperature and water potential for above-freezing, subfreezing, and freeze-thaw cycling conditions, with k = ln(n₃/n₁)/t and n₃/n₁ representing the proportion of potentially infective oocysts remaining after t days or t freeze-thaw cycles.