IDdx was built for queries. Users can find lists of matching infectious diseases by using the disease search criteria (99 signs & symptoms, 39 epidemiological factors, and 16 regions of the world). The user can see all the symptoms associated with a disease or see all the diseases associated with a symptom. See http://www.iddx.com/gideon.html for how IDdx compares to GIDEON, the only other infectious disease application built as a relational database to supports queries.

WHAT CAN YOU DO WITH IDdx?
- Explore the database of 253 diseases in 15 categories.
- Search by Disease Name or Disease Criteria.
- Disease criteria include 99 signs & symptoms, 39 epidemiological factors, and 16 regions of the world.
- Search by Occupation. Results are sorted by high-risk job tasks.
- Search by one or more incubation periods.
- Examples of epidemiological factors are ingest (entry), soil (source), ticks (vector), and cats (reservoir).
- Access diseases worldwide or limit the search to those endemic to the United States.

WHAT IS THE CONTENT? - Similar to the Control of Communicable Diseases Manual, the content includes coverage of 253 important infectious diseases organized into the following categories: arthropod-borne, bioterrorism, childhood, community-acquired, foodborne, gastroenteritis, sapronoses, localized infections, sexually-transmitted, and zoonoses.