Country operational research priorities pending.
Dem. Rep. of Congo
Pilot a strategy for mapping and treating Onchocerciasis and Lymphatic Filariasis in Loa loa coendemic areas
Determine the effectiveness of integrated control of Human African Trypanosomiasis (HAT) in a model district in DRC
The primary objective for this request is to evaluate the performance of the Biplex RDT in a cohort of 500 people previously tested for oncho and LF in 2014 (3-year follow up). The evaluation of the Biplex is an add-on to a study that will conduct a longitudinal follow up on a cohort of 500 people from the Tshopo Province. The primary outcomes are serology and clinical manifestations of onchocerciasis, This study also evaluates serology, parasitology and clinical manifestations for other filarial infections, mainly LF, Loa and Mansonella.
Preliminary Findings and Lessons Learned
This study built on an existing onchocerciasis longitudinal follow-up study in Banalia community, Tshopo province, DRC. The location is co-endemic for Oncho, LF, Loa loa and Mansonella perstans. 500 people previously tested in 2014 have been followed up and were retested in 2017. A total of 239, out of 500, agreed to participate in the follow-up activity and provided a blood specimen. Thirty percent were positive by skin snip, 3% were positive by FTS, 15% were found to have loa (thick blood film) and 41% had M. perstans. Ov16 ELISA testing found 67% positive, while the Biplex found 38% Ov16 positive. The sensitivity of the Ov16 biplex compared to the ELISA was 53%.
To complete mapping of NTDs in AFRO and support transitioning of new diagnostics tools into program use.
To compare different diagnostic tools during onchocerciasis mapping, including Ov16 ELISA, OV16 rapid diagnostic test (RDT) and skin snip test.
To compare antigenemia results by ICT and FTS RDT, antibody responses to Wb123 and Ov 16 by ELISA , and Wb123/Ov16 Biplex RDT on LF sentinel sites.