Table 3. Mean number (± 95% CI) colony pathogens detected in samples of adult bees.

2007 test of means: F = 5.76; df = 1,252; P = 0.017. 2008 test of means: F = 4.61; df = 1,150; P = 0.033.

	Weak colonies			Strong colonies
	Lower CI	Mean (n)	Upper CI	Lower CI	Mean (n)	Upper CI
2007	1.51	1.73 (115)	1.96	1.15	1.36 (139)	1.56
2008	2.25	2.49 (89)	2.74	1.79	2.08 (63)	2.37