Ecological dynamics of blacklegged ticks, vertebrate hosts, and associated zoonotic pathogens in northeastern forests

LaDeau, Shannon L., KellyOggenfuss, AlexanderSchmidt, SaravananThangamani, and Richard S.Ostfeld. 2025. “Ecological Dynamics of Blacklegged Ticks, Vertebrate Hosts, and Associated Zoonotic Pathogens in Northeastern Forests.” Ecosphere16(12): e70508. https://doi.org/10.1002/ecs2.70508

Researchers tested 2,000+ blacklegged ticks in New York over 9 years

38% of ticks carried at least one pathogen capable of infecting humans

About 10% carried multiple pathogens (co-infection)

• The most common combination was Lyme disease + Babesia microti

Babesia was found in 21% of ticks, higher than previous estimates

Bartonella was not detected in the ticks tested at these study sites

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