alexa Reproductive characteristics of Mastomys natalensis and Lassa virus prevalence in Guinea, West Africa.
Infectious Diseases

Infectious Diseases

Epidemiology: Open Access

Author(s): FichetCalvet E, Lecompte E, Koivogui L, Daffis S, ter Meulen J

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Abstract We recently reported increased prevalence of Lassa virus (LASV) infection in Mastomys natalensis during the rainy season in Guinea, West Africa. Here, the association of LASV prevalence with fecundity, fertility, and the age structure of the rodent population was analyzed using data from the previous study. The animals reproduced throughout the year, but highest fecundity was observed during the rainy season. Accordingly, the rodent population was aged at the beginning and young at the end of the rainy season. Lassa virus infection was observed in all age groups, including the very young, which is compatible with vertical transmission. However, since the prevalence of infection showed a trend with increasing age in the younger age groups, horizontal transmission by yet unknown mechanisms may also play a role in LASV transmission. Multivariate analysis did not show an association of LASV prevalence with any demographic variable studied. Rodent behavior influencing virus transmissibility and contaminated environment may therefore be responsible for spatial and seasonal variations in LASV prevalence in M. natalensis. This article was published in Vector Borne Zoonotic Dis and referenced in Epidemiology: Open Access

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