<prompt> Which one of the following statements is false -The presence of ingested erythrocytes is seen only in Entamoeba histolyticaYoung adult male of low socioeconomic status are most commonly affected by invasive amoebiasisA low iron content in the diet predisposes to invasive amoebiasisThe pathogenic and non-pathogenic strains of E. Histolytica can be differentiated by the electrophroretic study of zymodemes  <response>: In food vacuoles of trophozoites,erythrocytes,leucocytes,tissue debris are found Cultures are not used routinely but may on occasion prove positive in cases found negative by microscopy. Cultures permit the determination of zymodeme patterns for differentiation between pathogenic and nonpathogenic strains. TEXTBOOK OF MEDICAL PARASITOLOGY,CKJ PANIKER,6TH EDITION,PAGE NO 25 