Table. Yersinia pestis isolates collected from humans, small mammals, and fleas, United States.

State	No. isolates	Years collected
Arizona	151	1975, 1977–1984, 1986–1989, 1992–1996, 1998, 2000–2002
California	129	1943, 1962, 1970, 1977, 1979–1980, 1983–1999
Colorado	97	1963, 1968, 1989, 1992, 1995–1997, 1999–2002
Idaho	2	1987, 1997
Kansas	17	1997, 1999
Montana	11	1987, 1992–1993
North Dakota	2	1986, 1993
New Mexico	124	1950, 1976–1977, 1979–1988, 1991–1992, 1994–1995, 1997–2002
Nevada	36	1980–1985, 1987, 1992–1995
Oregon	18	1959, 1970–1971, 1977, 1979, 1981–1984, 1987
Texas	5	Unknown
Utah	55	1965, 1981–1984, 1991–1995, 1999–2001
Washington	2	1984
Wyoming	64	1978, 1980, 1982–1983, 1985–1987, 1989–1990, 1997, 2000–2001