Table 1. West Nile virus in wild mammals at 7 sites in Washington, DC, and Maryland, United States*.
| Capture site | UI | Age | % WNV seroprevalence (no. samples) |
|||||
|---|---|---|---|---|---|---|---|---|
| Tamias striatus | Sciurus carolinensis | Didelphis virginiana | Peromyscus leucopus | Procyon lotor | Rattus norvegicus | |||
| Baltimore, MD | 91.2 | J | 0 (3) | |||||
| A | 64 (10) | 50 (2) | ||||||
| Foggy Bottom, Washington, DC† | 75.5 | J | 20 (11) | 50 (2) | ||||
| J‡ | 43 (7) | |||||||
| A | 52 (23) | 50 (2) | 50 (6) | |||||
| A‡ | 100 (6) | |||||||
| Fort Dupont Park, Washington, DC | 38.8 | J | 100 (2) | 20 (5) | ||||
| A | 75 (8) | 60 (5) | 50 (2) | |||||
| Takoma Park, MD§ | 50.4 | J | 0 (2) | 71 (7) | ||||
| J‡ | 50 (6) | |||||||
| A | 65 (20) | 50 (6) | 100 (2) | |||||
| A‡ | 100 (5) | |||||||
| Bethesda, MD¶ | 41.5 | J | 0 (4) | 100 (1) | ||||
| A | 22 (12) | 67 (13) | ||||||
| Rock Creek Park, Rockville, MD# | 27.8 | J | 0 (5) | 0 (1) | ||||
| A | 16 (6) | 30 (20) | 0 (3) | 100 (3) | ||||
| SERC** | 16.2 | J | 50 (4) | 0 (11) | 0 (1) | |||
| A | 100 (1) | 25 (4) | 0 (6) | 0 (1) | ||||
*Mammals caught from June 14, 2005, through September 17, 2005, except where noted. WNV, West Nile virus; UI, urbanization index; A, adult; J, juvenile. †Also sampled house mouse, Mus musculus (1 WNV-positive adult, 1 WNV -negative juvenile). ‡Samples from April 2006. §Also sampled big brown bat, Eptesicus fuscus (1 WNV-negative adult), little brown bat, Myotis lucifugus (1 WNV-positive adult). ¶Also sampled little brown bat, Myotis lucifugus (1 WNV-positive adult). #Also sampled groundhog, Marmota monax (1 WNV-negative adult). **SERC, Smithsonian Environmental Research Center, Edgewater, MD; also sampled domestic cat (1 WNV-negative juvenile), groundhog, Marmota monax (1 WNV-negative adult, 1 WNV-positive adult), eastern cottontail rabbit, Sylvilagus floridanus (1 WNV-negative adult).