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 65% of tick tested are infected with at least one disease causing organism, 41% 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
65% Positive for Infection
Negative (35%)
Ixodes scapularis (deer tick)
79% Positive for Infection
Negative (21%)
Amblyomma americanum (lone star tick)
62% Positive for Infection
Negative (38%)
Dermacentor variabilis (American dog tick)
39% Positive for Infection
Negative (61%)

Coinfection Visualization

4+ Coinfection (5%)
3+ Coinfection (15%)
2+ Coinfection (41%)
No Co-infection (59%)

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 923 ticks.
23% Positive
77% Negative

Adult Female Deer Ticks

Sample size of 1,618 ticks.
36% Positive
64% Negative

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

Nymphal Deer Ticks

Sample size of 602 ticks.
10% Positive
90% Negative

Adult Female Deer Ticks

Sample size of 1,210 ticks.
12% Positive
88% Negative

Pathogenic Prevalence in Massachusetts

The bars below show the positive/negative prevalence ratio of selected pathogens we test for. These pathogens were observed in ticks from Massachusetts. 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 405 ticks.
35% Positive
65% Negative

Borrelia burgdorferi (American dog tick) associated with Lyme disease

Sample size of 94 ticks.
4% Positive
96% Negative

Anaplasma phagocytophilum associated with anaplasmosis

Sample size of 279 ticks.
10% Positive
90% Negative

Babesia microti associated with babesiosis

Sample size of 259 ticks.
5% Positive
95% Negative

Bartonella spp. associated with bartonellosis

Sample size of 116 ticks.
37% Positive
63% Negative

Ehrlichia chaffeensis associated with ehrlichiosis

Sample size of 63 ticks.
0% Positive
100% Negative

Rickettsia spp. associated with Rocky Mountain spotted fever

Sample size of 76 ticks.
16% Positive
84% Negative

Francisella tularensis associated with tularemia

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

Borrelia miyamotoi associated with B. miyamotoi

Sample size of 104 ticks.
2% Positive
98% Negative

Babesia spp. associated with babesiosis

Sample size of 64 ticks.
6% Positive
94% Negative

Mycoplasma spp. associated with Mycoplasma spp.

Sample size of 81 ticks.
6% Positive
94% Negative

Borrelia spp. associated with Borrelia spp.

Sample size of 46 ticks. Warning: Low Sample Size
22% Positive
78% Negative

Borrelia mayonii associated with Lyme disease

Sample size of 58 ticks.
0% Positive
100% Negative
Pathogen and co-infected tick prevalence data is © TickCheck, and is derived from our tick testing results and laboratory research.