Campillo Jérémy, Hemilembolo M. C., Louya F., Bikita P., Pion Sébastien, Boussinesq Michel, Missamou F., Chesnais Cédric. (2023). Temporal variability of Loa loa microfilaraemia. Parasites and Vectors, 16 (1), p. 23 [7 p.]. ISSN 1756-3305.
Titre du document
Temporal variability of Loa loa microfilaraemia
Année de publication
2023
Auteurs
Campillo Jérémy, Hemilembolo M. C., Louya F., Bikita P., Pion Sébastien, Boussinesq Michel, Missamou F., Chesnais Cédric
Source
Parasites and Vectors, 2023,
16 (1), p. 23 [7 p.] ISSN 1756-3305
Background The diurnal periodicity of Loa loa microfilaraemia is well known but few studies have documented the short- and long-term stability of microfilarial density. It seems stable over time at the community level, but significant variations have been observed at the individual level. Methods We assessed the temporal variability of L. loa microfilaraemia at 5-day, 1-month and 16-month intervals and analyzed the influence of sex, age, level of microfilaraemia, temperatures and time of sampling on this variability. Results At the community level, L. loa microfilaraemia is very stable over time at 5-day, 1-month and 16-month intervals (Pearson correlation coefficients of 0.92, 0.91 and 0.78, respectively, all three with P < 0.001). However, some individuals had significant variations of up to +/- 50% of their initial microfilaraemia at 5-day (33.0%), 1-month (36.5%) and 16-month (62.6%) intervals, even in individuals with an initial microfilaraemia density > 20,000 mf/ml (7.7, 23.1 and 41.4%, respectively, for 5 days, 1 month and 16 months). We do not highlight any external factors that have a major impact on this variability. Conclusion Although at the community level, microfilaria density is very stable, we highlight some individuals with large variations in both the short and long term, which may have an important impact on onchocerciasis control campaigns and longitudinal studies evaluating the impact of an intervention on L. loa microfilaraemia.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
Description Géographique
CONGO
Localisation
Fonds IRD [F B010087411]
Identifiant IRD
fdi:010087411
