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Our Tick Testing Data

Each tick submitted for testing contributes to the research being conducted here at TickCheck. By keeping records of all the results generated, we have been able to gain valuable insights into disease prevalence and co-infection rates. The comprehensive testing panel has been especially helpful in contributing to this research by ensuring all diseases and coinfections are accounted for when examining a tick. Our current research shows that 60% of tick tested are infected with at least one disease causing organism, 38% are co-infected with two or more, 14% carry three or more, and 5% of the ticks tested carry four or more.

Infection Visualization by Tick Species

All Ticks Tested
60% Positive for Infection
Negative (40%)
Ixodes scapularis (deer tick)
32% Positive for Infection
Negative (68%)
Amblyomma americanum (lone star tick)
17% Positive for Infection
Negative (83%)
Dermacentor variabilis (American dog tick)
6% Positive for Infection
Negative (94%)

Coinfection Visualization

4+ Coinfection (5%)
3+ Coinfection (14%)
2+ Coinfection (38%)
No Co-infection (62%)

Pathogenic Prevalence by Species & Life Stage

Generally, nymphal ticks will have fewer pathogen because they've had fewer opportunities to feed. Our data shows this as well.

Infection Rate for Borrelia burgdorferi between Adult Female and Nymphal Deer Ticks

Nymphal Deer Ticks

Sample size of 1,061 ticks.
24% Positive
76% Negative

Adult Female Deer Ticks

Sample size of 2,692 ticks.
36% Positive
64% Negative

Infection Rate for Anaplasma phagocytophilum between Adult Female and Nymphal Deer Ticks

Nymphal Deer Ticks

Sample size of 740 ticks.
10% Positive
90% Negative

Adult Female Deer Ticks

Sample size of 2,284 ticks.
12% Positive
88% Negative

Infection Rate for Rickettsia amblyommii between Adult Female and Nymphal Lone Star Ticks

Nymphal Deer Ticks

Sample size of 248 ticks.
46% Positive
54% Negative

Adult Female Deer Ticks

Sample size of 71 ticks.
51% Positive
49% Negative

Pathogenic Prevalence in California

The bars below show the positive/negative prevalence ratio of selected pathogens we test for. These pathogens were observed in ticks from California. Data set includes tests performed since TickCheck's founding in 2014 and is updated in real time.

Borrelia burgdorferi (deer tick) associated with Lyme disease

Sample size of 94 ticks.
11% Positive
89% Negative

Borrelia burgdorferi (western blacklegged tick) associated with Lyme disease

Sample size of 338 ticks.
5% Positive
95% Negative

Borrelia burgdorferi (American dog tick) associated with Lyme disease

Sample size of 128 ticks.
4% Positive
96% Negative

Anaplasma phagocytophilum associated with anaplasmosis

Sample size of 432 ticks.
3% Positive
97% Negative

Babesia microti associated with babesiosis

Sample size of 361 ticks.
2% Positive
98% Negative

Bartonella spp. associated with bartonellosis

Sample size of 233 ticks.
21% Positive
79% Negative

Ehrlichia chaffeensis associated with ehrlichiosis

Sample size of 143 ticks.
1% Positive
99% Negative

Rickettsia spp. associated with Rocky Mountain spotted fever

Sample size of 137 ticks.
19% Positive
81% Negative

Francisella tularensis associated with tularemia

Sample size of 102 ticks.
0% Positive
100% Negative

Borrelia miyamotoi associated with B. miyamotoi

Sample size of 206 ticks.
4% Positive
96% Negative

Borrelia lonestari associated with STARI

Sample size of 59 ticks.
2% Positive
98% Negative

Babesia spp. associated with babesiosis

Sample size of 101 ticks.
3% Positive
97% Negative

Mycoplasma spp. associated with Mycoplasma spp.

Sample size of 138 ticks.
7% Positive
93% Negative

Borrelia spp. associated with Borrelia spp.

Sample size of 87 ticks.
11% Positive
89% Negative

Powassan virus Lineage II associated with Deer tick virus

Sample size of 58 ticks.
5% Positive
95% Negative

Borrelia mayonii associated with Lyme disease

Sample size of 137 ticks.
0% Positive
100% Negative

Ehrlichia ewingii associated with ehrlichiosis

Sample size of 39 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Rickettsia amblyommii associated with Rocky Mountain spotted fever

Sample size of 28 ticks. Warning: Low Sample Size
7% Positive
93% Negative

Babesia duncani associated with babesiosis

Sample size of 41 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Rickettsia rickettsii associated with Rocky Mountain spotted fever

Sample size of 29 ticks. Warning: Low Sample Size
3% Positive
97% Negative

Ehrlichia muris-like associated with ehrlichiosis

Sample size of 41 ticks. Warning: Low Sample Size
2% Positive
98% Negative
Pathogen and co-infected tick prevalence data is © TickCheck, and is derived from our tick testing results and laboratory research.