A study led by researchers from Penn State's College of Agricultural Sciences, in partnership with Antech Diagnostics, has discovered the presence of Echinococcus, a zoonotic tapeworm, in wild canids like coyotes and foxes in Pennsylvania. This research, published in the journal One Health, aimed to investigate the spread of gastrointestinal parasites among wild canids, pet dogs, and hunting dogs. The team used a more advanced diagnostic method called the KeyScreen GI Parasite PCR test, which is more sensitive than traditional fecal float methods. The results showed that wild canids had higher levels of multiple parasites compared to pet dogs, while hunting dogs had higher levels of specific parasites like hookworms and whipworms compared to pet dogs. Echinococcus was only recently identified in Pennsylvania, and traditional diagnostic methods may not detect it due to the similarity of its eggs to those of other tapeworms and their small size. This highlights the importance of using advanced diagnostic tools to identify zoonotic parasites—those that can be transmitted from animals to humans. However, the study also notes that such tests have limitations when it comes to detecting a wide range of parasites in wildlife, underscoring the need for continued research and improved diagnostic techniques. The research involved collaboration between undergraduate students and researchers from multiple institutions, supported by a range of partners including industry leaders, academic institutions, state and federal agencies, hunters, and pet owners. This multi-faceted approach reflects the complexity of studying parasites that affect both animals and humans. The study's findings emphasize the interconnectedness of human, animal, and environmental health, reinforcing the importance of a One Health approach—where the health of people, animals, and ecosystems are considered together. By identifying the presence of Echinococcus in wild canids, the study raises awareness about the potential risks these parasites pose to both pets and humans. It also highlights the need for greater vigilance in monitoring and managing the health of animals in the wild, as well as domestic pets, to prevent the spread of zoonotic diseases. The research serves as a reminder that the health of ecosystems and the animals within them can have direct implications for human health.