A March 2026 study documenting the parasites was published in PLOS Neglected Tropical Diseases. Researchers from the University of Washington found Echinococcus multilocularis in 37 of the 100 coyotes they surveyed in Washington’s Puget Sound region.

“The fact that we found it here in one-third of our coyotes was surprising, because it wasn’t found anywhere in the Pacific Northwest until earlier this year,” said Yasmine Hentati, lead author of the study and former doctoral researcher at the University of Washington, in an interview with the university.

Full News Article: https://wildlife.org/washingtons-coyotes-carry-tapeworm/

Full Publication: Detection of Echinococcus multilocularis in coyotes in Washington State, USA highlights need for increased wildlife surveillance