Ramassamy Jill-lea, Ayouba Ahidjo, Thaurignac G., Ndongo C. B., Nnuka P., Betsem E., Njouom R., Ngole E. M., Vanhomwegen J., Hoinard D., England P., Journeaux A., Picard C., Thomas D., Pannetier D., Baize S., Delaporte E., Peeters Martine, Gessain A. (2024). High seroreactivities to orthoebolaviruses in rural Cameroon : a case-control study on nonhuman primate bites and a cross-sectional survey in rural populations. Journal of Infectious Diseases, [Early access], p. [10 p.]. ISSN 0022-1899.
Titre du document
High seroreactivities to orthoebolaviruses in rural Cameroon : a case-control study on nonhuman primate bites and a cross-sectional survey in rural populations
Année de publication
2024
Auteurs
Ramassamy Jill-lea, Ayouba Ahidjo, Thaurignac G., Ndongo C. B., Nnuka P., Betsem E., Njouom R., Ngole E. M., Vanhomwegen J., Hoinard D., England P., Journeaux A., Picard C., Thomas D., Pannetier D., Baize S., Delaporte E., Peeters Martine, Gessain A.
Source
Journal of Infectious Diseases, 2024,
[Early access], p. [10 p.] ISSN 0022-1899
Background Ebola (EBOV) and Sudan (SUDV) orthoebolaviruses are responsible for lethal hemorrhagic fever outbreaks in humans in Central and West Africa, and in apes that can be at the source of human outbreaks for EBOV.Methods To assess the risk of exposure to orthoebolaviruses through contact with nonhuman primates (NHP), we tested the presence of antibodies against different viral proteins with a microsphere-based multiplex immunoassay in a case-control study on bites from NHPs in forest areas from Cameroon (n = 795) and in cross-sectional surveys from other rural populations (n = 622) of the same country.Results Seroreactivities against at least 2 viral proteins were detected in 13% and 12% of the samples for EBOV and SUDV, respectively. Probability of seroreactivity was not associated with history of NHP bites, but was 3 times higher in Pygmies compared to Bantus. Although no neutralizing antibodies to EBOV and SUDV were detected in a selected series of highly reactive samples, avidity results indicate strong affinity to SUDV antigens.Conclusions The detection of high level of seroreactivities against orthoebolaviruses in rural Cameroon, where no outbreaks have been reported, raises the possibilities of silent circulation of orthoebolaviruses, or of other not yet documented filoviruses, in these forested regions.Article's main point Our study found high seroreactivities to Ebola and Sudan orthoebolavirus antigens in rural Cameroonian populations, especially among Pygmies, despite no reported outbreaks. This suggests potential silent circulation of orthoebolaviruses or unknown filoviruses, highlighting the need for further surveillance and research.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
Description Géographique
CAMEROUN
Localisation
Fonds IRD [F B010091293]
Identifiant IRD
fdi:010091293
