Table 1

Parameter	Estimated Effect§
Intercept	5.82
Time ¥	0.13
Fall†	-2.95
Summer	2.83
Farm A‡	-0.54
Time*Summer£	0.24
Farm B*Spring€	1.39
Farm A*Summer	1.15

§ Estimated effect on log of SPC bacteria count (log of cfu/ml) in milk
¥ Effect of each increase in 1 hr of time since pasteurization
† Effect of season (Winter is baseline season)
‡ Effect of farm (Farm C is baseline farm)
£ Interaction - Effect of each increase in 1 hr of time since pasteurization during
each season; SPC increased more with each hr since pasteurization during
Summer (Winter is baseline)
€ Interaction – effect of season on a specific farm (Farm C is baseline farm)
R²=0.71, P<0.0001

Table 1: General linear model estimated effects of significant factors on log of bacteria count (LogSPC in cfu/ml) in milk following pasteurization.