[1] Interdisciplinary Ctr Med Res Franceville CIRMF, Unit Res Hlth Ecol, Franceville, Gabon
[2] Univ Sci Sante USS, Dept Epidemiol Biostat & Informat Med DEBIM, Unite Rech Epidemiol Malad Transmissibles Sante En, Owendo 4009, Gabon
[3] Ecole Doctorale Reg Africa Cent Infectiol Trop ECO, Franceville, Gabon
[4] Masuku Univ Sci & Technol USTM, Fac Sci, Dept Biol, Franceville, Gabon
[5] Hlth Sci Univ USS, Dept Parasitol, Owendo 4009, Libreville, Gabon