TABLE 1.

B. hermsii isolates used in this study

Isolate	Geographic origin	Source	Yr of isola- tion	Refer- ence
HS1	Spokane, Wash.	O. hermsi tick	1968	56
DAH	Northwest of Cheney, Wash.	Human blood	1991	47
FRO	Eastern Washington	Human blood	1987	46
MAN	Sierra Nevada Mountains, Calif.	Human blood	1960s	46
CON	Sierra Nevada Mountains, Calif.	Human blood	1960s	46
HAN	Bonner’s Ferry, Idaho	Human blood	1990	47
YOR	Siskiyou Mountains, Calif.	Human blood	1964	46
REN	Winthrop, Wash.	Human blood	1992	47