- Compared efficacy of repeated annual and semi-annual doses of ivermectin and diethylcarbamazine for prevention of Wuchereria bancrofti filariasis in French Polynesia. Final evaluation. Cartel, J.L., Spiegel, A., Nguyen Ngnoc, L., Cardines, R., Plichart, R., Martin, P.M., Roux, J.F., Moulia-Pelat, J.P. Trop. Med. Parasitol. (1992)