Table 1.

Number and percentage of EEEV antibody-positive deer sera by county in Vermont in 2010

County	No. deer serum samples screened	No. EEEV antibody-positive sera (% [95% CI])
Franklin	92	15 (16.3 [9.8–24.9])
Bennington	86	4 (4.7 [1.5–10.8])
Windsor	65	6 (9.2 [3.8–18.2])
Rutland	53	2 (3.8 [0.6–11.9])
Addison	49	4 (8.2 [2.6–18.5])
Chittenden	36	4 (11.1 [3.6–24.7])
Washington	27	5 (18.5 [7.1–36.4])
Orleans	16	1 (6.3 [0.3–27.2])
Lamoille	12	5 (41.7 [17.2–68.0])
Unknown	11	1 (9.1 [0.5–37.3])
Caledonia	7	1 (14.3 [0.7–53.0])
Windham	4	1 (25.0 [1.3–75.8])
Essex	3	1 (33.3 [1.7–86.8])
Orange	18	0 (0–15.3)
Grand Isle	10	0 (0–25.9)
Total	489	50 (10.2 [7.8–13.2])

CI = confidence interval.