Investigation of Anaplasma marginale Seroprevalence in a Traditionally Managed Large California Beef Herd

Table 3

True seroprevalence and 95% CI for Anaplasma marginale at baseline and final sampling times and values for McNemar’s test comparing TP within groups at baseline and final sampling for three cattle cohorts from a beef herd in California which were followed up for Anaplasma marginale seroconversion.

Age group	Baseline sample		Final sample
	TP (%)	95% CI	TP (%)^1	95% CI
Group 1 heifers	19.23	(6.02, 35.92)	68.68	(51.16, 83.06)
Group 2 heifers	41.13	(27.69, 54.56)	92.38	(80.99, 100.00)
Cows	89.55	(73.07, 99.57)	95.49	(80.17, 100.00)

Within a column, values with different superscript letters are significantly different ().
McNemar’s test value < 0.001.
Two group 2 heifers were lost to follow-up between the initial and final sample days.
McNemar’s test value .