TABLE 1.

The IgG and IgM titers of sera from patients with murine typhus, epidemic typhus, or typhus of undetermined etiology

Patient no.	Diagnosis	Antibody titer obtained
		Before adsorption				After R. typhi adsorption				After R. prowazekii adsorption
		R. typhi		R. prowazekii		R. typhi		R. prowazekii		R. typhi		R. prowazekii
		IgG	IgM	IgG	IgM	IgG	IgM	IgG	IgM	IgG	IgM	IgG	IgM
1	Murine typhus	512	1,024	256	2,048	<32	<32	<32	<32	256	32	<32	<32
2	Murine typhus	2,048	1,024	2,048	1,024	<32	<32	<32	<32	512	64	<32	<32
3	Murine typhus	256	512	128	128	<32	<32	<32	<32	256	<32	<32	<32
4	Murine typhus	256	256	128	128	<32	<32	<32	<32	64	<32	<32	<32
5	Murine typhus	2,048	1,024	512	512	<32	<32	<32	<32	256	64	<32	<32
6	Epidemic typhus	512	256	2,048	2,048	<32	<32	256	128	<32	<32	<32	<32
7	Epidemic typhus	64	32	128	512	<32	<32	128	<32	<32	<32	<32	<32
8	Epidemic typhus	256	512	1,024	1,024	<32	<32	512	<32	<32	<32	<32	<32
9	Epidemic typhus	256	32	256	32	<32	<32	128	<32	<32	<32	<32	<32
10	Epidemic typhus	256	1,024	1,024	2,048	<32	<32	256	128	<32	<32	<32	<32
11	Undetermineda	256	256	64	256	<32	<32	<32	<32	64	<32	<32	<32
12	Undetermined	2,048	128	4,096	128	<32	<32	512	<32	<32	<32	<32	<32

^aUndetermined, diagnosis of typhus of undetermined etiology.