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Volume 3, Number 2—June 1997

Dispatch

Seroepidemiologic Studies of Hantavirus Infection Among Wild Rodents in California

Michele Jay*, Michael S. Ascher†, Bruno B. Chomel‡, Minoo Madon§, David Sesline†, Barryett A. Enge†, Brian Hjelle¶, Thomas G. Ksiazek¥, Pierre E. Rollin¥, Philip H. Kass‡, and Kevin Reilly*
Author affiliations: *California Department of Health Services, Sacramento, California, USA; †Viral and Rickettsial Diseases Laboratory, Berkeley, California, USA; ‡University of California, Davis, California, USA; §California Department of Health Services, Ontario, California, USA; ¶University of New Mexico, Albuquerque, New Mexico, USA; ¥Centers for Disease Control and Prevention, Atlanta, Georgia, USA

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Table 2

Prevalence of antibodies to Sin Nombre virus among Peromyscus maniculatus by county, California, 1975-1995

County No. survey
sites No.tested No.pos. % pos.
COASTAL
Alameda 2 6 1 16.7
Contra Costa 1 36 0 0.0
Del Norte 2 19 0 0.0
Los Angeles 10(8) 112(71) 13(11) 11.6(15.5)
Marin 2 153 3 2.0
Mendocino 1 13 0 0.0
Monterey 2 52 5 9.6
Orange 8 52 3 5.8
San Diego 32 131 7 5.3
San Francisco 1 30 0 0.0
San Luis Obispo 2 4 0 0.0
San Mateo 1 40 8 20.0
Santa Barbara 6(2) 294(81) 86(7) 29.3(8.6)
Sonoma 1 7 0 0.0
Ventura 5(3) 137(9) 0(0) 0.0(0.0)
SUBTOTAL 76(68) 1086(704) 126(45) 11.6(6.4)
INLAND/VALLEY
Imperial 1 2 1 50.0
Riverside 10 57 0 0.0
Sacramento 1 36 0 0.0
San Bernardino 4 49 0 0.0
San Joaquin 1 7 0 0.0
SUBTOTAL 17 151 1 0.7
FOOTHILLS/MOUNTAINS
Butte 12 115 14 12.2
El Dorado 1 25 0 0.0
Glenn 1 4 0 0.0
Inyo 2 3 1 33.3
Kern 5 66 7 10.6
Mariposa 1 46 7 15.2
Mono 8 107 17 15.9
Nevada 1 52 26 50.0
Placer 2 29 2 6.9
Plumas 4 35 1 2.9
Shasta 3 30 4 13.3
Siskiyou 4 117 12 10.3
Tehama 1 35 5 14.3
Tulare 1 20 2 10.0
SUBTOTAL 46 684 99 14.5
TOTAL 139 1921 226 11.8

*Numbers in parentheses exclude the Channel Islands in Los Angeles (Catalina, San Clemente), Santa Barbara (San Miguel, Santa Barbara, Santa Cruz, Santa Rosa), and Ventura (Anacapa, San Nicolas) counties.

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