Which structure is used for identifying Entamoeba histolytica?

The identification of Entamoeba histolytica is primarily based on the presence of cysts, particularly those that contain four nuclei. These cysts are characteristically found in fecal samples and are an important diagnostic feature of the organism.

Cysts of E. histolytica can be observed microscopically, and their identification is crucial for diagnosing amoebic infections. The four-nucleated cysts are considered a definitive form of the parasite, indicating its potential pathogenicity.

While trophozoites, the active motile form of the parasite, can also be used for identification, they are less frequently observed in stool samples compared to cysts. Additionally, structures such as ova are not associated with this protozoan, and flagella are not present in E. histolytica, as it is not a flagellated organism. Focusing on cyst morphology, particularly those with four nuclei, provides a reliable basis for diagnosing infections caused by this organism.