Influence of soil physicochemical parameters on the abundance of Paracoelophrya polymorphus (Ciliophora: Radiophryidae) commensal of earthworms (Annelida: Glossoscolecidae) collected in Bambui (North-West Cameroon) Journal title: Journal of Biodiversity and Environmental Sciences (JBES) Authors: Zéphyrin Fokam, Paul Alain Nana, Karine Moche, Geneviève Bricheux, Philippe Bouchard, Pierre Ngassam... Subject(s): Biological Sciences, Environmental Sciences, Biology