Table 1 Clinical manifestations and immunofluorescent antibody titre (mean ± std) in lambs primary infected on day 0 with either A. phagocytophilum var 1 or var 2

Incubation period (days)^#

3.7 ± 0.47

4.5 ± 0.50

Max. temp. (°C)^##

41.6 ± 0.15

40.9 ± 0.33

Duration of fever (days)^###

6.0 ± 0.82

3.0 ± 0.58

Nadir of neutropenia (G/l)^###

0.3 ± 0.08

0.6 ± 0.11

Duration of neutropenia (days)^###

8.6 ± 1.10

2.3 ± 0.75

Antibody titre (log₁₀), day 14^###

3.4 ± 0.11

2.3 ± 0.15

Antibody titre (log₁₀), day 28^###

3.3 ± 0.37

2.3 ± 0.24