Microbiology General 75398a25 Non-pathogenic amoebae is/are - A E. histolytica B E.coli C Acanthanmoeba D All High-Yield Explanation Ans. is 'b' i.e., E. coli Non-pathogenic amaebae are E.hamanni, E.coli, E.polecki, Endolimax nana, lodamoeba botschlii, and Dientamoeba fragilis.