Volume 14, Number 7—July 2008
Dispatch
Anaplasma phagocytophilum Infection in Small Mammal Hosts of Ixodes Ticks, Western United States
Janet E. Foley*
, Nathan C. Nieto*, Jennifer Adjemian*, Haydee Dabritz†, and Richard N. Brown‡
, Nathan C. Nieto*, Jennifer Adjemian*, Haydee Dabritz†, and Richard N. Brown‡
Table 2
Regional seroprevelance and PCR prevalence rates for exposure to Anaplasma phagocytophilum in small mammals in various sites, northern and central California*
| Site | A. phagocytophilum IFA |
A. phagocytophilum msp2 PCR |
|||||
|---|---|---|---|---|---|---|---|
| Seropositive | Seroprevalence | 95% CI | PCR positive | PCR prevalence | 95% CI | ||
| Big Basin State Park | 16 | 6.30 | 3.76–10.22 | 5 | 12.20 | 4.58–27.00 | |
| Humboldt Redwoods State Park | 24 | 16.90 | 11.33–24.31 | 2 | 6.06 | 1.06–21.62 | |
| Hoopa Valley Indian Reservation | 173 | 36.19 | 31.91–40.70 | 6 | 4.14 | 1.69–9.18 | |
| Hendy Woods State Park | 43 | 22.51 | 16.93–29.22 | 5 | 12.19 | 4.58–27.00 | |
| King Range National Conservation Area | 1 | 3.45 | 0.18–19.63 | 0 | 0.00 | 0.00–80.21 | |
| Mendocino County (roadside only) | 0 | 0.00 | 0.00–94.53 | 0 | 0.00 | 0.00–94.54 | |
| Morro Bay regional communities | 5 | 1.23 | 0.45–3.01 | 2 | 0.67 | 0.12–2.65 | |
| Placerville City region (roadside only) | 1 | 1.00 | 5.46–1.00 | 1 | 1.00 | 5.46–1.00 | |
| Quincy City region (roadside only) | 2 | 50.00 | 15.00–84.99 | 0 | 0.00 | 0.00–60.42 | |
| Sutter Buttes State Park | 3 | 7.50 | 1.96–21.48 | 1 | 50.00 | 9.45–90.55 | |
| Sagehen Research Station | 17 | 7.69 | 4.68–12.24 | 0 | 0.00 | 0.00–60.42 | |
| Siskiyou County (roadside only) | 3 | 1.00 | 30.99–1.00 | 1 | 33.33 | 1.76–87.47 | |
| Sonoma | 1 | 1.00 | 5.46–1.00 | 0 | 0.00 | 0.00–94.54 | |
| Samuel P. Taylor State Park | 3 | 1.75 | 0.42–5.45 | 2 | 4.26 | 0.74–15.73 | |
| Trinity County (roadside only) | 2 | 40.00 | 7.26–82.96 | 0 | 0.00 | 0.00–53.71 | |
| Sacramento River Valley (roadside only) | 3 | 1.00 | 30.99–1.00 | 0 | 0.00 | 0.00–69.00 | |
| Willow Creek Town (roadside only) | 3 | 0.30 | 8.09–64.63 | 0 | 0.00 | 0.00–60.42 | |
| Yolo County | 1 | 6.67 | 0.35–33.97 | 0 | 0.00 | 0.00–25.35 | |
*IFA, immunofluorescence assay; CI, confidence interval.
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Page updated: July 12, 2010
Page reviewed: July 12, 2010
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