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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 51% of tick tested are infected with at least one pathogen, 36% are co-infected with two or more, 11% carry three or more, and 3% of the ticks tested carry four or more.

Infection Visualization by Tick Species

All Ticks Tested
51% Positive for Infection
Negative (49%)
Ixodes scapularis (deer tick)
28% Positive for Infection
Negative (72%)
Amblyomma americanum (lone star tick)
16% Positive for Infection
Negative (84%)
Dermacentor variabilis (American dog tick)
5% Positive for Infection
Negative (95%)

Coinfection Visualization

4+ Coinfection (3%)
3+ Coinfection (11%)
2+ Coinfection (36%)
No Co-infection (64%)

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 1,931 ticks.
24% Positive
76% Negative

Adult Female Deer Ticks

Sample size of 5,819 ticks.
37% Positive
63% Negative

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

Nymphal Deer Ticks

Sample size of 1,610 ticks.
9% Positive
91% Negative

Adult Female Deer Ticks

Sample size of 5,414 ticks.
11% Positive
89% Negative

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

Nymphal Lone Star Ticks

Sample size of 519 ticks.
50% Positive
50% Negative

Adult Female Lone Star Ticks

Sample size of 161 ticks.
52% Positive
48% Negative

Pathogenic Prevalence in Pennsylvania

The bars below show the positive/negative prevalence ratio of selected pathogens we test for. These pathogens were observed in ticks from Pennsylvania. 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 1,370 ticks.
33% Positive
67% Negative

Borrelia burgdorferi (lone star tick) associated with Lyme disease

Sample size of 75 ticks.
11% Positive
89% Negative

Borrelia burgdorferi (American dog tick) associated with Lyme disease

Sample size of 224 ticks.
3% Positive
97% Negative

Anaplasma phagocytophilum associated with anaplasmosis

Sample size of 1,102 ticks.
9% Positive
91% Negative

Babesia microti associated with babesiosis

Sample size of 1,004 ticks.
3% Positive
97% Negative

Bartonella spp. associated with bartonellosis

Sample size of 427 ticks.
21% Positive
79% Negative

Ehrlichia chaffeensis associated with ehrlichiosis

Sample size of 208 ticks.
1% Positive
99% Negative

Rickettsia spp. associated with Rocky Mountain spotted fever

Sample size of 138 ticks.
17% Positive
83% Negative

Francisella tularensis associated with tularemia

Sample size of 138 ticks.
0% Positive
100% Negative

Borrelia miyamotoi associated with B. miyamotoi

Sample size of 406 ticks.
4% Positive
96% Negative

Borrelia lonestari associated with STARI

Sample size of 103 ticks.
5% Positive
95% Negative

Babesia spp. associated with babesiosis

Sample size of 214 ticks.
7% Positive
93% Negative

Mycoplasma spp. associated with Mycoplasma spp.

Sample size of 271 ticks.
6% Positive
94% Negative

Borrelia spp. associated with Borrelia spp.

Sample size of 188 ticks.
30% Positive
70% Negative

Powassan virus Lineage II associated with Deer tick virus

Sample size of 146 ticks.
4% Positive
96% Negative

Borrelia mayonii associated with Lyme disease

Sample size of 294 ticks.
0% Positive
100% Negative

Ehrlichia ewingii associated with ehrlichiosis

Sample size of 58 ticks.
0% Positive
100% Negative

Rickettsia amblyommii associated with Rocky Mountain spotted fever

Sample size of 48 ticks. Warning: Low Sample Size
19% Positive
81% Negative

Babesia duncani associated with babesiosis

Sample size of 124 ticks.
0% Positive
100% Negative

Rickettsia rickettsii associated with Rocky Mountain spotted fever

Sample size of 130 ticks.
0% Positive
100% Negative

Ehrlichia muris-like associated with ehrlichiosis

Sample size of 125 ticks.
2% Positive
98% Negative
Pathogen and co-infected tick prevalence data is © TickCheck, and is derived from our tick testing results and laboratory research.