Sexually Transmitted Diseases

PLEASE NOTE: Effective July 20, 2020, the Department of Public Health office at 1650 Boone’s Lick Road will close for several months to enable building improvements. The department is now operating at a temporary facility, located at 1551 Wall St., in St. Charles. For assistance with department programs, please call 636-949-7400 or utilize online services.

Thank you for your patience.

COVID-19 Latest News - Update August 10, 2020

All St. Charles County Division of Health Services’ Clinics are temporarily closed to the public. For information on scheduling an appointment with the Sexually Transmitted Disease Clinic, please call 636-949-7484.

Please be aware that building restrictions are in place. Upon entrance to any County building, employees and the public are encouraged to wear cloth facial protection, and everyone is required to have a health screening, including temperature check, before entering. Those with a fever or who have other COVID-19 symptoms will not be permitted to enter the building.

This website will be updated daily, when necessary, to reflect any changes in facility or department services. The public is encouraged to continue accessing County Government services by phone, email and online when available. Thank you.

We hope that you will remain healthy and safe, and we thank you for your cooperation and understanding. Click here for a full list of online services available from St. Charles County Government departments and programs.


Sexually transmitted diseases (STDs) are the most commonly reported infectious diseases in the United States, with more than 20 million new infections reported each year according to the Centers for Disease Control and Prevention (CDC). These diseases cause significant short- and long-term consequences, and even deaths, for those infected.

Aside from total abstinence, regular testing is the only way to know if a person has an STD, as some illnesses do not present any symptoms. To help individuals know their status, the Division of Health Services Clinic provides confidential testing. Until further notice - Testing is available on Mondays and Fridays by appointment only.

To schedule an appointment, please call 636-949-7484.

Test to Know Your Status

Testing is essential for everyone interested in knowing their status. Talking openly and honestly with the medical provider will ensure thorough testing. The CDC especially recommends testing for:

  • Every adult at least one time for HIV.
  • Sexually active men and women who have new or multiple sex partners or who knowingly have a partner diagnosed with a sexually transmitted infection.
  • Pregnant women who may be at-risk for having an STD, so that the infection does not impact their pregnancy or the development of the child.
  • Sexually active men and women who have unsafe sex or share injection drug equipment.

Affordable testing services provided through the Division of Health Services are open to all seeking help. Screenings are payable by cash, check and credit card (includes a service fee). Coverage through individual health insurance plans is also accepted. For those that do test positive for these infections, medication and educational counseling are offered at no cost.

Nurse with specimen vials for testing_crop

Preventing the Spread of STDs

Smart decision-making is necessary to prevent the spread of these diseases. The most reliable way to avoid infection is to abstain from any sexual contact. Additionally, being in a long-term mutually monogamous relationship with an unaffected partner is recommended. Those who are sexually active should undergo regular testing and use latex condoms properly and consistently to reduce risk for transmission — although condom usage is not 100% effective in preventing pregnancy or STDs.