Table 1. Serum samples tested for Q fever, by year, France*.
| Year | No. positive/ no. tested (%) | No. positive |
|
|---|---|---|---|
| Acute disease | Chronic disease | ||
| 1985 | 239/2,290 (10.4) | 22 | 8 |
| 1986 | 518/3,464 (15.0) | 37 | 8 |
| 1987 | 767/4,361 (17.6) | 52 | 12 |
| 1988 | 706/3,403 (20.7) | 49 | 12 |
| 1989 | 1,316/4,258 (30.9) | 40 | 18 |
| 1990 | 1,621/4,720 (34.3) | 92 | 22 |
| 1991 | 1,737/5,028 (34.5) | 112 | 20 |
| 1992 | 2,011/5,249 (38.3) | 89 | 29 |
| 1993 | 1,815/7,020 (25.9) | 76 | 26 |
| 1994 | 1,472/7,222 (20.4) | 102 | 24 |
| 1995 | 1,359/6,171 (22.0) | 73 | 34 |
| 1996 | 1,326/7,101 (18.7) | 116 | 28 |
| 1997 | 1,683/7,050 (23.9) | 70 | 35 |
| 1998 | 1,420/7,340 (19.3) | 140 | 37 |
| 1999 | 1,537/8,296 (18.5) | 199 | 32 |
| 2000 | 1,460/8,444 (17.3) | 135 | 32 |
| 2001 | 1,589/8,974 (17.7) | 167 | 38 |
| 2002 | 2,029/10,639 (19.1) | 224 | 55 |
| 2003 | 2,094/10,588 (19.8) | 242 | 52 |
| 2004 | 2,544/10,742 (23.7) | 360 | 70 |
| 2005 | 2,514/10,597 23.7) | 199 | 100 |
| 2006 | 2,010/7,891 (25.5) | 266 | 237 |
| 2007 | 1,700/5,522 (30.8) | 244 | 278 |
| 2008 | 2,073/10,981 (18.9) | 256 | 263 |
| 2009 | 1,933/12,443 (15.5) | 361 | 205 |
| Total | 39,472/179,794 (21.9) | 3,723 | 1,675 |
*Acute disease, phase II (avirulent bacteria) immunoglobulin (Ig) G titer >200 and phase II IgM titer >50; chronic disease, phase I (virulent bacteria) IgG titer >800.