Table 2. Rate of positive bacterial infections in 46 Apodemus agrarius rodents, as indicated by serological assays.

Name of positive sera	Seropositive
	IFA titer for O. tsutsugamushi a (% positive rate)	PHA for Leptospira species b (% positive rate)
6–6	1:128	– c
6–7	1:64	–
7–4	1:16	–
7–13	1:16	–
7–17	1:16	1:160
7–18	1:32	–
8–7	1:256	–
8–9	1:64	–
No. of positive sera	8 (17.4)	1 (2.2)

^a Cutoff titer of immunofluorescence assay, immunoglobulin G ≥ 1:16,

^b Cutoff for passive hemagglutination assay ≥ 1:80,

^c–: negative.