Volume 14, Number 7—July 2008
Dispatch
Anaplasma phagocytophilum Infection in Small Mammal Hosts of Ixodes Ticks, Western United States
Table 1
Seroprevalence and PCR prevalence of Anaplasma phagocytophilum among small mammal species, northern and central coastal California*
Mammal species | A. phagocytophilum IFA |
A. phagocytophilum msp2 PCR |
|||||
---|---|---|---|---|---|---|---|
Seropositive | Seroprevalence | 95% CI | PCR positive | PCR prevalence | 95% CI | ||
Clethrionomys californicus | 1 | 12.50 | 0.6–53.3 | 0 | 0 | 0–53.7 | |
Glaucomys sabrinus | 2 | 14.29 | 2.5–43.9 | 1 | 16.7 | 0.8–63.5 | |
Mus musculus | 0 | 0.00 | 0–25.3 | 0 | 0 | 0–34.4 | |
Microtus californicus | 2 | 5.88 | 1.0–21.1 | 0 | 0 | 0–17.8 | |
Neotoma cinerea | 0 | 0.00 | 0–94.5 | 0 | 0 | 0–94.5 | |
N. fuscipes | 167 | 50.15 | 44.7–55.6 | 8 | 4.3 | 2.0–8.6 | |
N. macrotis | 2 | 3.03 | 5.3–11.5 | 1 | 1.8 | 0.09–10.6 | |
All Neotoma | 169 | 42.25 | 37.4–47.3 | 9 | 3.7 | 1.8–7.1 | |
Peromyscus boylii | 3 | 8.82 | 2.3–24.8 | 1 | 4.0 | 0.2–22.3 | |
P. californicus | 2 | 0.67 | 0.1–2.7 | 0 | 0 | 0–3.8 | |
P. maniculatus | 18 | 3.46 | 2.1–5.5 | 0 | 0 | 0–6.6 | |
P. truei | 1 | 2.56 | 0.1–15.1 | NT | |||
Peromyscus spp. | 0 | 0.00 | 0–53.7 | NT | |||
All Peromyscus | 24 | 2.68 | 1.8–4.0 | 1 | 0.45 | 0.02–2.9 | |
Rattus rattus | 0 | 0.00 | 0–37 | 0 | 0 | 0–37.1 | |
Reithrodontomys megalotis | 0 | 0.00 | 0–17.2 | 1 | 6.3 | 0.3–32.3 | |
Spermophilus beecheyi | 0 | 0.00 | 0–4.2 | 0 | 0 | 0–20.0 | |
S. lateralis | 2 | 22.22 | 3.9–59.9 | NT | |||
Sciurus carolinensis | 11 | 57.89 | 34.0–78.9 | 3 | 18.8 | 5.0–46.3 | |
S. griseus | 34 | 70.83 | 55.7–82.6 | 6 | 15.8 | 6.6–31.9 | |
S. niger | 1 | 100.00 | 55.0–100.0 | 0 | 0 | 0–94.5 | |
All Sciurus | 46 | 47.83 | 33.1–62.9 | 9 | 16.4 | 8.2–29.3 | |
Sorex spp. | 0 | 0.00 | 0–37.0 | 0 | 0 | 0–94.5 | |
Sylvilagus bachmani | 0 | 0.00 | 0–94.5 | NT | |||
Tamias amoenus | 6 | 6.82 | 2.8–14.8 | NT | |||
T. merriami | 0 | 0.00 | 0–48.3 | 0 | 0 | 0–40.2 | |
T. minimus | 0 | 0.00 | 0–4.9 | NT | |||
T. senex | 5 | 4.81 | 1.8–11.4 | NT | |||
T. speciosus | 4 | 33.33 | 11.3–64.6 | NT | |||
T. sonomae | 1 | 14.29 | 0.7–58.0 | 2 | 50.0 | 15.0–85.0 | |
T. ochrogenys | 30 | 27.52 | 19.6–37.0 | 2 | 6.9 | 1.2–24.2 | |
Tamias spp. | 2 | 8.33 | 1.5–28.5 | NT | |||
All Tamias | 48 | 13.45 | 10.2–17.5 | 4 | 34.0 | 3.2–24.1 | |
Tamiasciurus douglasii |
6 |
40.00 |
17.5–67.1 |
0 |
0 |
0–60.4 |
|
Total | 300 | 15.24 | 13.7–16.9 | 33 | 3.8 | 2.9–5.3 |
*IFA, immunofluorescence assay; CI, confidence interval; NT, not tested.