Table 3. IFA antibody titers of the 11 seropositive patients related to goat Q fever outbreak

Patients	Sex	Major work in the farm	Main symptoms	Onset time of symptoms	IFA antibody titers
					Phase I IgM	Phase I IgG	Phase II IgM	Phase II IgG
Farmer	M	Rearing	flu-like (severe)	6 days later	≤ 1:16	1:1,024	≤ 1:16	1:512
Farmer’s wife	F	Nursing	flu-like (severe)	6 days later	1:512	1:128	1:64	≥ 1:2,048
Officer a	M	Restraint	flu-like (severe)	5 days later	1:2,048	1:128	1:2,048	1:2,048
b	M	Restraint	flu-like (severe)	5 days later	1:256	≤ 1:16	1:64	1:1,024
c	M	Restraint	flu-like (severe)	7 days later	1:32	≤ 1:16	1:32	1:128
d	F	Lab works	flu-like (mild)	7 days later	1:256	≤ 1:16	≤ 1:16	1:256
e	M	Restraint	flu-like (mild)	14 days later	1:64	≤ 1:16	1:16	1:128
f	M	Lab works	flu-like (mild)	Unknown	1:1,024	≤ 1:16	≤ 1:16	1:1,024
g	M	Restraint	fatigue	Unknown	≤ 1:16	≤ 1:16	≤ 1:16	1:256
h	F	Sampling	fatigue	Unknown	≤ 1:16	≤ 1:16	1:16	1:128
i	M	Disinfection	fatigue	Unknown	1:64	≤ 1:16	1:128	1:256

Seropositivity was determined as antibody titer over 1:16 anti-IgG or IgM (phase II), M (male), F (female).
IFA, imunofluorescence assay.