Harbor–UCLA Medical Center 1 article published in JoVE Immunology and Infection Gene Expression Profiling of Infecting Microbes Using a Digital Bar-coding Platform Wenjie Xu1, Norma V. Solis2, Scott G. Filler2, Aaron P. Mitchell1 1Department of Biological Sciences, Carnegie Mellon University, 2Infectious Diseases, Harbor-UCLA Medical Center We developed a protocol that is fast, sensitive and reproducible for pathogen gene expression profiling during an infection.