Table 1.

Serological results A, B, C, D and E. cELISA positive (above cutoff) sheep with frequency, respective proportion (%), median titers and titer range.

Flock (n)	Parameter	Spring 2005	Autumn 2005	Spring 2006	Autum 2006
A	No. positive	15	13	11	11
15 sheep	Prop. Pos. (%)	100	87	73	73
	Median titer	91.7	86.6	81.3	82.3
	Titer range	70.9 – 99.9	55.1 – 99.2	62.0 – 99.0	55.3 – 99.2
B	No. positive	8	4	2	8
26 sheep	Prop. Pos. (%)	31	16	8	31
	Median titer	65.0	62.9	58.7	63.9
	Titer range	61.3 – 72.8	55.1 – 68.1	56.4 – 61.0	55.3 – 77.5
C	No. positive	14	13	14	15
17 sheep	Prop. Pos. (%)1	82	76	82	88
	Median titer	82.9	72.2	71.3	76.8
	Titer range	69.1 – 95.2	55.1 – 89.6	57.1 – 94.8	55.4 – 95.8
D	No. positive	13	21	29	19
63 sheep	Prop. Pos. (%)	21	33	46	30
	Median titer	69.5	69.1	69.4	74.3
	Titer range	55.1 – 100	55.1 – 93.4	55.6 – 88.6	56.9 – 95.2
E	No. positive	26	24	19	24
63 sheep	Prop. Pos. (%)	42	38	30	38
	Median titer	73.4	81.2	80.4	81.8
	Titer range	57.4 – 94.8	56.5 – 96.3	55.2 – 97.6	56.0 – 98.7

¹significant difference in % positive (Fishers Exact Test, p = 0.024)