Table 2.

Serological results vaccinated vs. non-vaccinated (Flock B and E). Comparison of cELISA positive (above cutoff) vaccinated and naturally exposed sheep with frequency, respective proportion (%), median titers and titer range.

Flock (n)	Parameter	Spring 2005	Autumn 2005	Spring 2006	Autum 2006
B1	No. positive	6	3	2	2
14 sheep	Prop. Pos. (%)	43	22	14	43
	Median titer	62.9	61.3	58.7	64.5
	Titer range	61.3 – 64.2	55.1 – 66.3	56.4 – 61.0	55.3 – 77.5
B2	No. positive	2	1	0	2
12 sheep	Prop. Pos. (%)	17	8	0	17
	Median titer	71.1	68.1	-	62.2
	Titer range	69.4 – 72.8	-	-	55.9 – 68.5
E1	No. positive	1	0	0	1
13 sheep	Prop. Pos. (%)	8	0	0	8
	Median titer	61.4	-	-	73.2
	Titer range	-	-	-	-
E2	No. positive	25	24	19	23
50 sheep	Prop. Pos. (%)	50	48	38	46
	Median titer	76.3	81.2	80.4	82.2
	Titer range	57.4 – 94.7	56.5 – 96.3	55.2 – 97.6	56.0 – 98.7

¹vaccinated group

²non-vaccinated group