A parasitic worm that infects and kills dogs has been found in California for the first time, a new study reports. The worm was discovered near the Arizona border on the banks of the Colorado River.
The discovery marks the furthest west this dog-infecting worm has been found in the U.S. The parasite, called Heterobilharzia americana, is mainly found in Gulf Coast and South Atlantic states but appears to have expanded its range into additional regions in recent years.
