(Salem, OR) -- Oregon scientists are credited for determining what caused a nationwide salmonella outbreak that sickened more than 130 people. Public Health Epidemiologist Emilio DeBess says bearded dragons were the source of a strain of salmonella resistant to the antibiotic ceftriaxone [[ SEFF-tree-AX-own ]]. Bearded dragons are popular pets with children, but DeBess says children under ten should not be allowed to handle any reptile. He tells "The Oregonian" that those who handle reptiles should wash their hands frequently and sanitize any surface that children might touch.