Delineation of onchocerciasis operational transmission zones of Burkina Faso

Background Defining the transmission zones for onchocerciasis is a critical first step needed in an endemic country aiming at eliminating the transmission of onchocerciasis. The process focuses on defining the geographical boundaries of areas where onchocerciasis transmission could persist with minimal influence from neighbouring regions. The use of operational transmission zones (OTZ) allows for assessment of interruption of onchocerciasis transmission with greater certainty within endemic countries. Methods We used available environmental, epidemiological, and entomological data on onchocerciasis in Burkina Faso from the OCP program to the present day. This information, together with field assessment allowed delineation of OTZs across the whole country. Results Six OTZs were identified: Comoé-Léraba, Dienkoa, Bas-Mouhoun, Volta, Boucle du Mouhoun and Gourma. Conclusion The delineation of the operational onchocerciasis OTZs of Burkina Faso will facilitates the implementation of futures interventions and assessment of the progress towards the disease elimination within the country and bordering regions.