Volume 3, Number 2—June 1997
Dispatch
Seroepidemiologic Studies of Hantavirus Infection Among Wild Rodents in California
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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