Table 1.

Number (percent) of seropositive individuals in all outbreaks in first and control (after one to four months) testing.

Individuals embraced by the outbreak	Serological testing in outbreaks (No. of seropositive/No. of tested)		No. of symptomatic cases#
	First testing**	Control testing***
Milkmaids	3/5 (60%)	4/5 (80%)	3
Farm workers*	32/116 (28%)	11/49 (23%)	9
Veterinary staff	16/36 (44%)	5/12 (42%)	8
Incidental visitors	10/86 (12%)	10/42 (24%)	1
Raw milk consumers##	7/36 (19%)	7/36 (19%)	5
Total	67/279 (24%)	38/141 (30%)	25

^*Animal service with everyday contact with animals;

^**testing 1–4 weeks after infection was recognized in animals;

^***testing 1–3 months after infection was recognized in animals;

^#all presented acute Q fever symptoms such as: myalgia, arthralgia, headache, cough, asthenia, rigors, perspirations, stomach ache;

^##family members.