Toxicity and mutagenicity evaluation of water coagulated with Moringa oleifera seed preparations using fish, protozoan, bacterial, coliphage, enxyme and Ames Salmonella assays Toxicity and mutagenicity evaluation of water coagulated with Moringa oleifera seed preparations using fish, protozoan, bacterial, coliphage, enxyme and Ames Salmonella assays Posted in .