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 61% of tick tested are infected with at least one disease causing organism, 40% are co-infected with two or more, 15% carry three or more, and 5% of the ticks tested carry four or more.

Infection Visualization by Tick Species

All Ticks Tested
61% Positive for Infection
Negative (39%)
Ixodes scapularis (deer tick)
32% Positive for Infection
Negative (68%)
Amblyomma americanum (lone star tick)
18% Positive for Infection
Negative (82%)
Dermacentor variabilis (American dog tick)
7% Positive for Infection
Negative (93%)

Coinfection Visualization

4+ Coinfection (5%)
3+ Coinfection (15%)
2+ Coinfection (40%)
No Co-infection (60%)

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 1,054 ticks.
24% Positive
76% Negative

Adult Female Deer Ticks

Sample size of 2,114 ticks.
38% Positive
62% Negative

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

Nymphal Deer Ticks

Sample size of 733 ticks.
10% Positive
90% Negative

Adult Female Deer Ticks

Sample size of 1,706 ticks.
13% Positive
87% Negative

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

Nymphal Deer Ticks

Sample size of 237 ticks.
46% Positive
54% Negative

Adult Female Deer Ticks

Sample size of 70 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 82 ticks.
11% Positive
89% Negative

Borrelia burgdorferi (western blacklegged tick) associated with Lyme disease

Sample size of 238 ticks.
4% Positive
96% Negative

Borrelia burgdorferi (American dog tick) associated with Lyme disease

Sample size of 122 ticks.
4% Positive
96% Negative

Anaplasma phagocytophilum associated with anaplasmosis

Sample size of 318 ticks.
2% Positive
98% Negative

Babesia microti associated with babesiosis

Sample size of 249 ticks.
2% Positive
98% Negative

Bartonella spp. associated with bartonellosis

Sample size of 180 ticks.
27% Positive
73% Negative

Ehrlichia chaffeensis associated with ehrlichiosis

Sample size of 135 ticks.
1% Positive
99% Negative

Rickettsia spp. associated with Rocky Mountain spotted fever

Sample size of 133 ticks.
20% Positive
80% Negative

Francisella tularensis associated with tularemia

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

Borrelia miyamotoi associated with B. miyamotoi

Sample size of 153 ticks.
5% Positive
95% Negative

Borrelia lonestari associated with STARI

Sample size of 57 ticks.
2% Positive
98% Negative

Babesia spp. associated with babesiosis

Sample size of 68 ticks.
4% Positive
96% Negative

Mycoplasma spp. associated with Mycoplasma spp.

Sample size of 104 ticks.
6% Positive
94% Negative

Borrelia spp. associated with Borrelia spp.

Sample size of 54 ticks.
7% Positive
93% Negative

Powassan virus Lineage II associated with Deer tick virus

Sample size of 25 ticks. Warning: Low Sample Size
12% Positive
88% Negative

Borrelia mayonii associated with Lyme disease

Sample size of 85 ticks.
0% Positive
100% Negative

Ehrlichia ewingii associated with ehrlichiosis

Sample size of 38 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Rickettsia amblyommii associated with Rocky Mountain spotted fever

Sample size of 27 ticks. Warning: Low Sample Size
7% Positive
93% Negative
Pathogen and co-infected tick prevalence data is © TickCheck, and is derived from our tick testing results and laboratory research.