Corresponding author Thirumala-Devi Kanneganti, Ph.D., pictured with first authors Ein Lee, M.D., and Rajendra Karki, Ph.D. Credit: St. Jude Children’s Research Hospital St. Jude Children’s Research Hospital scientists have identified a key molecule that serves as a “security chief” to help the immune system quickly recognize and fight infections with dangerous gram-negative bacteria like Salmonella....