Table 1.

Seroprevalence of IgG against Coxiella burnetii, Ehrlichia chaffeensis, Bartonella henselae, Anaplasma phagocytophilum, and Spotted Fever Group Rickettsiae (SFGR) in Patient Samples from Chiangrai and Mae Sot (Total n=375)

	Chiangrai (n=188)		Mae Sot (n=187)
Target organism	IgG positivity	Age/positivity p value (χ2)	IgG positivity	Age/positivity p value (χ2)	Difference between sites p value (χ2)
Anaplasma phagocytophilum	10 (5.3%)	0.478	7 (3.7%)	0.241	0.464
Bartonella henselae	34 (18.1%)	0.347	16 (8.6%)	0.457	0.007
Coxiella burnetii	12 (6.4%)	0.025	1 (0.5%)	0.309	0.002
Ehrlichia chaffeensis	22 (11.7%)	0.664	113 (60.4%)	0.094	<0.001
SFGR	62 (33.0%)	0.758	51 (27.3%)	<0.001	0.229

Values in bold italics indicate that that they are statistically significant (p ≤ 0.05).

IgG, immunoglobulin G.