Serological Investigation of Granulocytic EhrlichiaInfection in Sheep in Norway

Table 5 Comparison of E. equi serology and tick pasture in relation to the number of seropositive sheep flocks in Norway.

Pasture	Seropositive flocks	Seronegative flocks	Total
Ixodes-infested	32	2 *	34
Ixodes-free	0	41	41
Total	32	43	75

Yates corrected χ² = 63.51 (p < 0.00001)
* Both flocks were grazing on pasture with an unknown distribution of I. ricinus; one flock had been prophylactically treated with synthetic pyrethroids

ISSN: 1751-0147