TickReport

Testing ticks for pathogens since 2006. Tick educators and researchers. Resources added here:

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We detected Anaplasma phagocytophilum, a bacterium that can cause anaplasmosis, in this male black-legged deer tick from Bergen County, New Jersey!

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Our Tick of the Week is a female black-legged deer tick from Nova Scotia! We detected Borrelia burgdorferi, a bacterium that can cause Lyme disease.

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Our Tick of the Week is a female black-legged deer tick from Hillsborough County, New Hampshire. We detected two pathogens: Borrelia burgdorferi (Lyme disease) and Anaplasma phagocytophilum (anaplasmosis)!

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The Tick of the Week is a female black-legged deer tick from Steuben County, New York. We detected three pathogens in this specimen: Borrelia burgdorferi (Lyme disease), Borrelia miyamotoi (hard tick relapsing fever), and Anaplasma phagocytophilum (anaplasmosis). Spooky! 👻

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Our Tick of the Week is a female black-legged deer tick from Washington County, Rhode Island, carrying THREE pathogens: Borrelia burgdorferi (Lyme disease), Borrelia miyamotoi (hard tick relapsing fever), and Anaplasma phagocytophilum (anaplasmosis)!

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This female black-legged deer tick from Middlesex County, Massachusetts, was carrying three pathogens: Borrelia burgdorferi (Lyme disease), Babesia microti (babesiosis), and Powassan virus!

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This black-legged deer tick from Sheboygan County, Wisconsin, was carrying two pathogens. Borrelia burgdorferi is a bacterium that can cause Lyme disease and Babesia microti is a red blood cell parasite that can cause babesiosis.

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This female black-legged deer tick from Chittenden County, Vermont, was carrying THREE pathogens: Borrelia burgdorferi (Lyme disease), Babesia microti (babesiosis), and Anaplasma phagocytophilum (anaplasmosis).

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Our Tick of the Week comes to us from Norfolk County, Massachusetts! It was carrying Borrelia miyamotoi, a bacterium that can cause hard tick relapsing fever.

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This black-legged deer tick from Worcester County, Massachusetts, was carrying Borrelia burgdorferi, the most common causative agent of Lyme disease.

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#FlashbackFriday (May 2025): the Tick of the Week is a female American dog tick from DuPage County, Illinois, that was carrying Francisella tularensis. F. tularensis is a rare bacterium that can cause tularemia, a potentially serious illness, in its host.

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Borrelia burgdorferi was detected in this black-legged deer tick from our neighbors in Franklin County, Massachusetts! B. burgdorferi is the most common causative agent of Lyme disease.

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We detected Borrelia miyamotoi in this black-legged deer tick from Carroll County, New Hampshire! B. miyamotoi is a bacterium that can cause hard tick relapsing fever if transmitted to the tick's host.

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Two pathogens detected in this black-legged deer tick from Dukes County, Massachusetts: Borrelia burgdorferi (Lyme disease) and Babesia microti (babesiosis)!

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No pathogens detected in this adult, male American dog tick from Ocean County, New Jersey! However, we have previously detected Anaplasma phagocytophilum in Dermacentor ticks from the state.

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We detected Ehrlichia ewingii in this lone star tick (Amblyomma americanum) from Camden County, New Jersey! This pathogen can cause ehrlichiosis if transmitted to its host.

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This nymphal lone star tick (Amblyomma americanum) from Anne Arundel County, Maryland, was carrying Borrelia lonestari, a bacterium that can cause southern tick-associated rash illness in its host.

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This black-legged deer tick from Oconto County, Wisconsin, was carrying three pathogens: Borrelia burgdorferi (Lyme disease), Babesia microti (babesiosis), and Ehrlichia muris-like agent (ehrlichiosis)!

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This western black-legged tick (Ixodes pacificus) from Marin County, California, was carrying both Borrelia burgdorferi and Anaplasma phagocytophilum!