The district offers assistance and refers clients who have been exposed to tuberculosis for chest x-rays, follow-up and medicines as needed. Sexually transmitted diseases can be treated at the clinics, free of charge. Free confidential HIV testing and counseling also is available. Communicable disease investigation, surveillance and control is a district service. The district is actively involved in disaster planning, including possible bio terrorist events and conducts investigations of suspected food and water borne outbreaks, conducts surveillance and provides guidance for rabies exposure.