Washington State University

Tapeworm in a third of Puget Sound coyotes: here's what that means for your dog.

Well, here's a plot twist I didn't have on my Pullman bingo card: a third of coyotes in the Puget Sound area are carrying a tapeworm that can cause some serious disease.

3 min readUW News
Tapeworm in a third of Puget Sound coyotes: here's what that means for your dog.
A new University of Washington study detected a parasitic tapeworm that can infect domestic dogs and humans in the intestines of one-third of coyotes surveyed in Washington. This coyote (not part of the study) was spotted in Seattle’s Discovery Park last fall. Photo: Samantha Kreling

The recent discovery of the Echinococcus multilocularis tapeworm in coyotes across the Puget Sound region serves as a significant reminder of the interconnectedness of wildlife and human health. As highlighted in the article, one-third of the surveyed coyotes were found to carry this parasitic tapeworm, which poses potential risks not just to domestic dogs but also to humans. This finding is alarming and underscores the importance of staying informed about zoonotic diseases—those that can be transmitted from animals to humans. The implications of such discoveries extend beyond mere statistics; they challenge us to consider the broader ecological and public health landscapes, especially in our rapidly urbanizing environments. For instance, the recent court ruling that reinstated a professor at Texas State highlights the need for academic freedom in addressing complex issues, much like the discourse surrounding wildlife health and safety.

Echinococcus multilocularis is not a new player in the United States, having been documented in various regions across North America for years. However, its emergence in the Pacific Northwest, a region known for its rich biodiversity and outdoor lifestyle, raises several questions. How can we mitigate risks to both our beloved pets and ourselves? The presence of this tapeworm may force us to rethink our interactions with wildlife and consider practical measures for prevention. For instance, the importance of responsible pet ownership cannot be overstated—ensuring that pets are regularly checked for parasites and educating local communities about potential risks could curb the spread of this tapeworm. This situation calls to mind similar conversations around local wildlife conservation efforts, such as those discussed in the article on how UW researchers deciphered beluga calls to strengthen conservation efforts.

The implications of this parasite's presence highlight the need for a community-first approach to wildlife health. Local governments, animal shelters, and veterinary services must come together to create educational campaigns that inform residents about the risks and preventative measures. This is particularly important for pet owners in urban areas, where interactions between wildlife and domestic animals are more likely to occur. The question of how to navigate our coexistence with wildlife is pertinent now more than ever. As we venture outdoors—be it for a hike in the nearby mountains or a stroll in the park—we must remain vigilant and informed about the potential threats to both our health and our pets' well-being.

In closing, the arrival of Echinococcus multilocularis in Washington coyotes serves as a critical juncture for public health and environmental awareness. We must proactively engage with the realities of our ecosystem, acknowledging that the health of our wildlife directly impacts our own. As we continue to observe the evolving landscape of wildlife health and its implications, one must wonder: what steps will we take as a community to ensure that future generations can enjoy the natural beauty of the Pacific Northwest without fear of such parasitic threats?

From UW News

New evidence suggests that a disease-causing tapeworm that has been spreading across the United States and Canada has arrived in the Pacific Northwest. The tapeworm, called Echinococcus multilocularis, lives as a parasite in coyotes, foxes and other canid species and can cause severe disease if passed to domestic dogs or humans.

Read the original at UW News

Briefing

Source
UW News
Published
April 7, 2026