A professor has called for Americans to spread awareness of a dog-killing parasite that was recently discovered in the Colorado River for the first time. The Colorado River is the 6th largest river in the United States. Despite its name, water from the river runs through Wyoming, Utah, New Mexico, Nevada, Arizona, and California. Infection can cause canine schistosomiasisScientists based at the University of California, Riverside, discovered flatworms in the Colorado River for the first time. The flatworms (Heterobilharzia americana), only known to live in Texas and other Gulf Coast states, ha…