Table 1.

Seroprevalence of C. burnetii among blood donors

Country	Year	Seroprevalence, %	Author [ref.]
The Netherlands	1987	45	Richardus et al. [127]
France	1992	4	Tissot-Dupont et al. [31]
Newfoundland	2001	8	Hatchette et al. [129]
Germany	2001	15–22	Hellenbrand et al. [54]
Spain	2007	23 (IgG), 0.3 (IgM)	Bartolomé et al. [131]
Turkey	2008	32 (IgG), 3 (IgM)	Kilic et al. [130]
The Netherlands	2012	12 (IgG)	Hogema et al.a [128]

^aFalse-positive reactions in the test collectives cannot be ruled out.