More rattler victims experiencing extreme symptoms

Toxicologists in Arizona, Colorado and California say they have documented an "extreme symptom" increase in victims of rattlesnake bites, but they're not sure why. At least five people have died from rattlesnake bites in Arizona since 2002—three or four of them from the extreme symptoms--the same number of fatalities experienced during the 20 previous years. "This is a brand-new phenomenon," said Jeffrey Brent, clinical professor of medicine at the University of Colorado Health Sciences Center. AP reports.