Aims to assist scientists in infectious-disease research. PATRIC is a National Institute of Health (NIH) supported bioinformatics resource center that has been built to enable comparative genomic analysis of bacterial pathogens. The database provides researchers with an online resource that stores and integrates a variety of data types (e.g. genomics, transcriptomics, protein-protein interactions (PPIs), three-dimensional protein structures and sequence typing data) and associated metadata. Tools and services for bacterial infectious disease research are also available.