The most distinctive feature of pathogenic E. histolytica on fresh stool examination is:: (A) Presence of active pseudopodia, (B) Erythrophagocytosis, (C) Presence of intracytoplasmic vacuole, (D) Presence of two nucleoli
Answer is B. The trophozoites from acute dysentric stools often contain phagocytosed erythrocytes. This feature is diagnostic and distinctive as phagocytosed red cells are not found in any other commensal intestinal amoebae.