show Abstracthide AbstractPlanorbidae snails are molluscs of health importance as they are intermediate hosts for trematode parasite of the Schistososma genus that are responsible of bilharzia, a disease affecting notably humans and cattle. Here we aimed at characterizing the microbiota composition of several Planorbidae species and strains to better understand which factors shape their bacterial communities. Individual snail microbiota was determined using 16S rDNA amplicon sequencing on 12 individuals of Biomphalaria glabrata (strains BAR2, BRE2, GH2, BS90), Biomphalaria pgeifferi, Planorbarisu metidjensis, Bulinus truncatus).