Table 1. Rodent-associated Bartonella serologic results in 114 adults with acute febrile illness, southwestern United States.

Clinical diagnosis	Total	No. thrombocytopenic	No. leukopenic	Titer to Neotoma albigula–associated Bartonella antigen
				<64	128	256	512	>1,024
Undifferentiated fever	76	55	43	52	11	2	5	6
Bacterial pneumonia	12	4	4	12	0	0	0	0
Hantavirus pulmonary syndrome	12	12	0	11	1	0	0	0
Other febrile illnesses	14	9	4	11	0	1	0	2