Lake County Illinois GISSTI Rates in Lake County, Illinois. An explanation of field attributes: Chlamydia - Chlamydia is a common sexually transmitted infection (STI) caused by the bacteria Chlamydia trachomatis. This is a rate per 100,000. Gonorrhea - Gonorrhea is a common sexually transmitted infection (STI) caused by the bacteria Neisseria gonorrhoeae . This is a rate per 100,000.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/f81c33b967fd49aa8ef06ab7ce950010_5engLake County Illinois Open Data PortalPublicSTI Rates [Illinois--Lake County]Web servicesIllinois--Lake CountyIllinoisLast Modified: 2018-09-18