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Volume 14, Number 7—July 2008
Dispatch

Anaplasma phagocytophilum Infection in Small Mammal Hosts of Ixodes Ticks, Western United States

Janet E. Foley*Comments to Author , Nathan C. Nieto*, Jennifer Adjemian*, Haydee Dabritz†, and Richard N. Brown‡
Author affiliations: *University of California, Davis, California, USA; †California Department of Public Health, Richmond, California, USA; ‡Humboldt State University, Arcata, California, USA;

Main Article

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.

Main Article

Page created: July 12, 2010
Page updated: July 12, 2010
Page reviewed: July 12, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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