Entomological surveillance indicates potential interruption of onchocerciasis transmission in Chad's Oulibangala region, suggesting successful disease control efforts.
Background Chad onchocerciasis program is conducting several onchocerciasis surveillance activities to verify the interruption of the disease transmission and deciding to stop the MDA ongoing in the country since 1998. Methods Entomological surveillance was conducted from June 2021 to February 2022 in the onchocerciasis persistence focus of Oulibangala, Chad Results A total of 6 962 Simulium spp. Blackflies were collected near Oulibangala (n=5 871) and Kaitia (n=1181). Vector blackflies were pooled and tested for O. volvulus DNA using O-150 PCR. Conclusions No O. volvulus infections were detected, suggesting potential interruption of transmission in the area.
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Oumar et al. (2025) studied this question.
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