Table. Ig detection by immunofluorescent assay and molecular results by PCR and sequence identity of the amplicons of gltA and 17-kDa genes of Rickettsia spp. from 2 patients with murine typhus, Yucatan, Mexico.

Patient age, y/sex	Days after illness onset	Immunofluorescence assay								Rickettsia species*
		R. typhi			R. rickettsii			PCR/sequence test
		IgM	IgG		IgM	IgG		17 kDa	gltA
45/F	8	256	128		Neg	128		Pos	Pos	R. typhi
	12	128	128		Neg	64		Pos	Pos	R. typhi
	16	64	128		Neg	64		Neg	Neg	ND
12/M	8	128	128		Neg	64		Pos	Pos	R. typhi

*Identified species showed 99% identity with R. typhi Wilmington strain 17-kDa antigen gene (GenBank accession no. AE017197.1) and 100% identity with R. typhi Wilmington strain gltA gene (GenBank accession no. AE017197.1). ND, species not determined.