Some diseases, such as gonorrhea, Chlamydia, syphilis, HIV and Hepatitis B are reportable to the Missouri Department of Health and Senior Services (MDHSS). The MDHSS has trained, professional Disease Intervention Specialists who confidentially track and investigate these reportable diseases. The purpose it to ensure that the person and their partner(s) have been adequately treated. The goal is to stop the spread of STDs.