Dabarar Tacewar Membrane (MF) dabara ce mai inganci kuma karbuwa don gwada samfuran ruwa don gurɓataccen ƙwayoyin cuta. An gabatar da dabarar a ƙarshen 1950s a matsayin madadin hanya mafi yuwuwar Lamba (MPN) don nazarin ƙananan ƙwayoyin cuta na samfuran ruwa.