University of Arizona entomology professor Kathleen Walker is leading the Great Arizona Tick check, part of a project to map the distribution of ticks and the diseases they carry. Ticks can carry ...

Statewide rates of dogs testing positive for exposure to the bacterium that causes anaplasmosis nearly tripled between 2021 and 2024. The same ticks that spread anaplasmosis also spread Lyme disease.

A blacklegged tick, Ixodes pacificus, on a leaf. The parasite can spread anaplasmosis and Lyme disease. (Smith Collection / Gado / Getty Images) Dog owners may need to be on alert for a disease many ...

Dog owners may need to be on alert for a disease many have never heard of — anaplasmosis, spread by the same tick that transmits Lyme disease. Anaplasmosis can make dogs feverish or lethargic, turn ...