Mississippi Code Title 41. Public Health § 41-3-43

(1) Each county in the state is authorized in its discretion to create a county health department and to appropriate funds for its support. A director for the same shall be appointed in accordance with Section 41-3-37 and certified to the board of supervisors of the county. Said director shall be a licensed physician, well trained in health work and shall be required to give his entire time to the work.

(3) When any county or counties create a health department hereunder, then all other local or municipal or county public health agencies and departments are thereby automatically abolished, and said county and district health departments shall have full control over all health matters in said county and counties, including all municipalities therein, subject to the supervision, direction, and jurisdiction of the state board of health. The proper authorities of any municipality in the State of Mississippi are hereby authorized in their discretion to make an appropriation for the support of such county or district health department from the general funds of such municipality.