TABLE 1.

Original source, pathogenic characteristics, genetic group, and plasmid type of C. burnetii strains

Groupa	Plasmid typeb	Isolatec	Phase	Original source	Disease or type	Passaged
I	QpH1	Nine Mile RSA493	I	Montana, tick, 1935		307GP/1TC/1EP
		Turkey RSA333	II	Turkey, human blood, 1948	Acute	31EP
		African RSA334 (>e)	I	Central Africa, human blood, 1949	Acute, Congolese red fever	3HP/4EP
		Giroud RSA431 (>e)	I	Central Africa, human blood, 1949	Acute, Congolese red fever	2GP/2EP
		El Tayeb RSA342	I	Egypt, tick, 1967		4GP/2EP
		Panama RSA335	I	Panama, chiggers, 1961		4EP
		California 33 RSA329	I	California, cow's milk, 1947	Persistent	6EP
		Ohio 314 RSA270	I	Ohio, cow's milk, 1956	Persistent	4EP
II		Henzerling RSA331	II	Italy, human blood, 1945	Acute	36EP
IV	QpRS	Priscilla	I	Montana, goat cotyledon, 1980	Abortion	GP/2EP
		KQ154	I	Oregon, human heart valve, 1976	Endocarditis	HV/2EP
V	NP	GQ212	I	Nova Scotia, Canada, human heart valve, 1981	Endocarditis	HV/2EP
		SQ217	I	Montana, human liver biopsy sample, 1981	Hepatitis	BX/2EP
		KoQ229	I	Nova Scotia, Canada, human heart valve, 1982	Endocarditis	HV/2EP
VI	QpDG	Dugway 7E22-57	I	Utah, rodents, 1958		3EP
—f	QpDV	MAN	I	French, human blood	Aortic aneurysm	?
—f		ME	I	French, human heart valve	Endocarditis	?

^aAs defined by restriction enzyme banding patterns (5).

^bPlasmids were described elsewhere (22, 27).

^cProvided by Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, Hamilton, Mont. Reference strains were determined by complement block titration (M. G. Peacock, Rocky Mountain Laboratories).

^dNumbers indicate passage number; GP, guinea pig passage; TC, tissue culture; EP, egg passage; HP, hamster passage; HV, heart valve; BX, liver biopsy sample; ?, passage prior to receipt in authors' laboratory not known.

^e>, passage history variants.

^f—, MAN and ME were not classified (27).