%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Savassi, Baes
%A Dobigny, Gauthier
%A Etougbetche, J. R.
%A Avocegan, T. T.
%A Quinsou, F. T.
%A Gauthier, Philippe
%A Ibikounle, M.
%A Mone, H.
%A Mouahid, G.
%T Mastomys natalensis (Smith, 1834) as a natural host for Schistosoma haematobium (Bilharz, 1852) Weinland, 1858 x Schistosoma bovis Sonsino, 1876 introgressive hybrids
%D 2021
%L fdi:010081097
%G ENG
%J Parasitology Research
%@ 0932-0113
%K Schistosoma haematobium x Schistosoma bovis ; Cercarial chronobiology ; Mastomys natalensis ; Rattus rattus ; Schistosome transmission
%K BENIN
%M ISI:000626790100001
%N 5
%P 1755-1770
%R 10.1007/s00436-021-07099-7
%U https://www.documentation.ird.fr/hor/fdi:010081097
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2021-05/010081097.pdf
%V 120
%W Horizon (IRD)
%X Cercarial emission of schistosomes is a determinant in the transmission to the definitive host and constitutes a good marker to identify which definitive host is responsible for transmission, mainly in introgressive hybridization situations. Our goal was to test the hypothesis that micro-mammals play a role in Schistosoma haematobium, S. bovis, and/or S. haematobium x S. bovis transmission. Small mammal sampling was conducted in seven semi-lacustrine villages of southern Benin. Among the 62 animals trapped, 50 individuals were investigated for Schistosoma adults and eggs: 37 Rattus rattus, 3 Rattus norvegicus, 9 Mastomys natalensis, and 1 Crocidura olivieri. Schistosoma adults were found in four R. rattus and two M. natalensis, with a local prevalence reaching 80% and 50%, respectively. Two cercarial chronotypes were found from Bulinus globosus experimentally infected with miracidia extracted from naturally infected M. natalensis: a late diurnal and nocturnal chronotype, and an early diurnal, late diurnal, and nocturnal chronotype. The cytochrome C oxidase subunit I mtDNA gene of the collected schistosomes (adults, miracidia, and cercariae) belonged to the S. bovis clade. Eleven internal transcribed spacer rDNA profiles were found; four belonged to S. bovis and seven to S. haematobium x S. bovis. These molecular results together with the observed multi-peak chronotypes add M. natalensis as a new host implicated in S. haematobium x S. bovis transmission. We discuss the origin of the new chronotypes which have become more complex with the appearance of several peaks in a 24-h day. We also discuss how the new populations of offspring may optimize intra-host ecological niche, host spectrum, and transmission time period.
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