The following table contains the results of tests for evidence of Borrelia infection in ticks collected in California in 2008. The tests were conducted by the California Department of Public Health, Vector-Borne Disease Section (CDPH-VBDS), and by the United States Army Center for Health Promotion and Preventive Medicine - West (US Army).
|
County
|
Location
|
Ticks |
Pools
tested |
Number Pools Positive
|
|||
|
DFA
|
PCR**
|
Laboratory
|
|||||
| Borrelia spp. |
Borrelia spp. | Borrelia burgdorferi | |||||
| Alameda | Indian Joe Trail |
25
|
25
|
0
|
CDPH-VBDS | ||
| Little Yosemite Area |
4
|
4
|
0
|
CDPH-VBDS | |||
| Amador | Grinding Rock SP |
31
|
4
|
1
|
US Army | ||
| Calveras | Natural Bridge |
103
|
11
|
US Army | |||
| Water Treatment Site |
13
|
4
|
40
|
US Army | |||
| Contra Costa | Tilden Regional Park |
115 (170*)
|
115 (170*)
|
1 (4*)
|
CDPH-VBDS | ||
| Lake | Mendocino NF |
190 (2*)
|
19 (1*)
|
4
|
3
|
US Army | |
| Middletown |
5 (3*)
|
5 (3*)
|
0
|
CDPH-VBDS | |||
| Los Angeles | Angeles NF |
17
|
17
|
0
|
CDPH-VBDS | ||
| Charmlee Wilderness |
117
|
117
|
0
|
CDPH-VBDS | |||
| Malibu |
100
|
10
|
0
|
US Army | |||
| Madera | Chepo Saddle |
2 (1*)
|
1 (1*)
|
0
|
US Army | ||
| Marin | Point Reyes NS |
5
|
5
|
0
|
CDPH-VBDS | ||
| Marin Headlands |
67
|
67
|
3
|
CDPH-VBDS | |||
| Mariposa | Sierra NF |
20
|
2
|
0
|
US Army | ||
| Mendocino | Manchester SB |
26
|
26
|
0
|
CDPH-VBDS | ||
| Nevada | Nevada City |
17 (8*)
|
11 (2*)
|
0
|
US Army | ||
| Riverside | San Bernardino NF |
26 (1*)
|
26 (1*)
|
0
|
CDPH-VBDS | ||
| San Bernardino | San Bernardino NF |
6
|
2
|
0
|
US Army | ||
| San Diego | Cleveland NF |
24
|
3
|
0
|
US Army | ||
| Cleveland NF |
23
|
23
|
0
|
CDPH-VBDS | |||
| San Joaquin | Carnigie SP |
22
|
8
|
0
|
US Army | ||
| Santa Clara | Henry Coe SP |
100 (11*)
|
10 (1*)
|
2 (1*)
|
2 (1*)
|
US Army | |
| Shasta | Anderson River Park |
38
|
4
|
0
|
US Army | ||
| Baily Cove CG |
18
|
2
|
0
|
US Army | |||
| Anderson |
51
|
5
|
0
|
US Army | |||
| Redding |
70
|
7
|
0
|
US Army | |||
| Stanislaus | Patterson |
3
|
2
|
0
|
US Army | ||
| Total ticks tested |
1,238 (196*)
|
535 (179*)
|
|||||
| Total pools positive |
4 (4*)
|
11 (1*)
|
5 (1*)
|
||||
* Nymphs; ** PCR primer sets were specific for B. burgdorferi;
Tests: DFA, Direct Fluorescent Antibody; PCR, Polymerase Chain Reaction;
CG, Campground; NF, National Forest; NS, National Seashore; SB, State Beach; SP, State Park;