Since 2009, Marin County has seen an increase in syphilis cases, as is being seen regionally. In 2014, there were 20 cases reported. 19 of these were men, and most were men who have sex with men (MSM). USPSTF recommends that providers screen those at increased risk for syphilis infection, including MSM. The CDC recently updated its Sexually Transmitted Diseases Treatment Guidelines, which are now available as a mobile app.