Table 1.

Patient and diagnostic characteristics.

Diagnostic Test	Positive n	% Positive Overall
STG * polymerase chain reaction (PCR)	48	11.7%
STG immunoglobulin M (IgM) ≥3200 admission	54	13.1%
STG IgM 4-fold rise to ≥3200	8	1.9%
STG IgM ≥3200 or 4-fold rise to ≥3200	62	15.1%
Total STG positives (immunofluorescence assay (IFA) + PCR)	71	17.2%
TG ** PCR	15	3.6%
SFG *** PCR	5	1.2%

* STG–Scrub typhus group; ** STG–Typhus group; *** SFG–Spotted fever group.