Table 3. Levels of IgG phase II antibody titers in patients with acute Q fever.

No.	Concentration of IgG Phase II (U/ml) in first sample	Concentration of IgG Phase II (U/ml) in the second sample
1	5	38
2	24	50
3	26	95
4	16	50
5	5	30
6	6	50
7	12	30
8	13	50
9	11	150
10	15	42
11	<5	26
12	8	26
13	10	24
14	14	38
15	12	27
16	<5	500<