Ixodes pacificus ticks tested for evidence of Borrelia species, California, 2008.

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
tested

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;