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 44% of tick tested are infected with at least one pathogen, 32% are co-infected with two or more, 9% carry three or more, and 3% of the ticks tested carry four or more.

Infection Visualization by Tick Species

All Ticks Tested
44% Positive for Infection
Negative (56%)
Ixodes scapularis (deer tick)
24% Positive for Infection
Negative (76%)
Amblyomma americanum (lone star tick)
14% Positive for Infection
Negative (86%)
Dermacentor variabilis (American dog tick)
3% Positive for Infection
Negative (97%)

Coinfection Visualization

4+ Coinfection (3%)
3+ Coinfection (9%)
2+ Coinfection (32%)
No Co-infection (68%)

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 3,141 ticks.
24% Positive
76% Negative

Adult Female Deer Ticks

Sample size of 8,989 ticks.
36% Positive
64% Negative

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

Nymphal Deer Ticks

Sample size of 2,818 ticks.
8% Positive
92% Negative

Adult Female Deer Ticks

Sample size of 8,578 ticks.
10% Positive
90% Negative

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

Nymphal Lone Star Ticks

Sample size of 877 ticks.
49% Positive
51% Negative

Adult Female Lone Star Ticks

Sample size of 291 ticks.
51% Positive
49% Negative

Pathogenic Prevalence in Illinois

The bars below show the positive/negative prevalence ratio of selected pathogens we test for. These pathogens were observed in ticks from Illinois. 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 227 ticks.
22% Positive
78% Negative

Borrelia burgdorferi (lone star tick) associated with Lyme disease

Sample size of 68 ticks.
1% Positive
99% Negative

Borrelia burgdorferi (American dog tick) associated with Lyme disease

Sample size of 237 ticks.
2% Positive
98% Negative

Anaplasma phagocytophilum associated with anaplasmosis

Sample size of 358 ticks.
5% Positive
95% Negative

Babesia microti associated with babesiosis

Sample size of 225 ticks.
0% Positive
100% Negative

Bartonella spp. associated with bartonellosis

Sample size of 168 ticks.
3% Positive
97% Negative

Ehrlichia chaffeensis associated with ehrlichiosis

Sample size of 297 ticks.
0% Positive
100% Negative

Rickettsia spp. associated with Rocky Mountain spotted fever

Sample size of 125 ticks.
17% Positive
83% Negative

Francisella tularensis associated with tularemia

Sample size of 171 ticks.
0% Positive
100% Negative

Borrelia miyamotoi associated with B. miyamotoi

Sample size of 185 ticks.
2% Positive
98% Negative

Borrelia lonestari associated with STARI

Sample size of 137 ticks.
1% Positive
99% Negative

Babesia spp. associated with babesiosis

Sample size of 76 ticks.
5% Positive
95% Negative

Mycoplasma spp. associated with Mycoplasma spp.

Sample size of 110 ticks.
4% Positive
96% Negative

Borrelia spp. associated with Borrelia spp.

Sample size of 81 ticks.
22% Positive
78% Negative

Powassan virus General associated with Powassan virus General

Sample size of 45 ticks. Warning: Low Sample Size
2% Positive
98% Negative

Borrelia mayonii associated with Lyme disease

Sample size of 81 ticks.
0% Positive
100% Negative

Ehrlichia ewingii associated with ehrlichiosis

Sample size of 74 ticks.
0% Positive
100% Negative

Rickettsia amblyommii associated with Rocky Mountain spotted fever

Sample size of 74 ticks.
16% Positive
84% Negative

Babesia duncani associated with babesiosis

Sample size of 49 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Rickettsia rickettsii associated with Rocky Mountain spotted fever

Sample size of 257 ticks.
2% Positive
98% Negative

Ehrlichia muris-like associated with ehrlichiosis

Sample size of 49 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Ehrlichia spp. associated with Ehrlichia spp.

Sample size of 31 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Anaplasma spp. associated with Anaplasma spp.

Sample size of 31 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Anaplasma phagocytophilum - Deer Variant associated with non-human anaplasmosis

Sample size of 75 ticks.
1% Positive
99% Negative

Anaplasma phagocytophilum - Human Active associated with anaplasmosis

Sample size of 75 ticks.
3% Positive
97% Negative
Pathogen and co-infected tick prevalence data is © TickCheck, and is derived from our tick testing results and laboratory research.