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 50% of tick tested are infected with at least one pathogen, 35% are co-infected with two or more, 10% carry three or more, and 3% of the ticks tested carry four or more.

Infection Visualization by Tick Species

All Ticks Tested
50% Positive for Infection
Negative (50%)
Ixodes scapularis (deer tick)
27% Positive for Infection
Negative (73%)
Amblyomma americanum (lone star tick)
15% Positive for Infection
Negative (85%)
Dermacentor variabilis (American dog tick)
5% Positive for Infection
Negative (95%)

Coinfection Visualization

4+ Coinfection (3%)
3+ Coinfection (10%)
2+ Coinfection (35%)
No Co-infection (65%)

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 1,954 ticks.
25% Positive
75% Negative

Adult Female Deer Ticks

Sample size of 6,318 ticks.
37% Positive
63% Negative

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

Nymphal Deer Ticks

Sample size of 1,633 ticks.
9% Positive
91% Negative

Adult Female Deer Ticks

Sample size of 5,910 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 544 ticks.
50% Positive
50% Negative

Adult Female Lone Star Ticks

Sample size of 170 ticks.
52% Positive
48% Negative

Pathogenic Prevalence in Maryland

The bars below show the positive/negative prevalence ratio of selected pathogens we test for. These pathogens were observed in ticks from Maryland. 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 280 ticks.
24% Positive
76% Negative

Borrelia burgdorferi (lone star tick) associated with Lyme disease

Sample size of 388 ticks.
4% Positive
96% Negative

Borrelia burgdorferi (American dog tick) associated with Lyme disease

Sample size of 60 ticks.
5% Positive
95% Negative

Anaplasma phagocytophilum associated with anaplasmosis

Sample size of 380 ticks.
6% Positive
94% Negative

Babesia microti associated with babesiosis

Sample size of 233 ticks.
1% Positive
99% Negative

Bartonella spp. associated with bartonellosis

Sample size of 178 ticks.
11% Positive
89% Negative

Ehrlichia chaffeensis associated with ehrlichiosis

Sample size of 360 ticks.
1% Positive
99% Negative

Rickettsia spp. associated with Rocky Mountain spotted fever

Sample size of 200 ticks.
44% Positive
56% Negative

Francisella tularensis associated with tularemia

Sample size of 214 ticks.
0% Positive
100% Negative

Borrelia miyamotoi associated with B. miyamotoi

Sample size of 209 ticks.
3% Positive
97% Negative

Borrelia lonestari associated with STARI

Sample size of 252 ticks.
9% Positive
91% Negative

Babesia spp. associated with babesiosis

Sample size of 60 ticks.
5% Positive
95% Negative

Mycoplasma spp. associated with Mycoplasma spp.

Sample size of 159 ticks.
3% Positive
97% Negative

Borrelia spp. associated with Borrelia spp.

Sample size of 78 ticks.
23% Positive
77% Negative

Powassan virus Lineage II associated with Deer tick virus

Sample size of 46 ticks. Warning: Low Sample Size
2% Positive
98% Negative

Borrelia mayonii associated with Lyme disease

Sample size of 92 ticks.
0% Positive
100% Negative

Ehrlichia ewingii associated with ehrlichiosis

Sample size of 90 ticks.
2% Positive
98% Negative

Rickettsia amblyommii associated with Rocky Mountain spotted fever

Sample size of 86 ticks.
41% Positive
59% Negative

Babesia duncani associated with babesiosis

Sample size of 45 ticks. Warning: Low Sample Size
0% Positive
100% Negative

Rickettsia rickettsii associated with Rocky Mountain spotted fever

Sample size of 228 ticks.
0% Positive
100% Negative

Ehrlichia muris-like associated with ehrlichiosis

Sample size of 45 ticks. Warning: Low Sample Size
0% Positive
100% Negative
Pathogen and co-infected tick prevalence data is © TickCheck, and is derived from our tick testing results and laboratory research.