In this section, we analyze the protozoan subphylum Sarcodina — amoebas. The main focus is on the causative agent of intestinal amoebiasis, as well as free-living amoebas capable of causing severe central nervous system lesions.
The section includes the general characteristics of amoebas and a detailed analysis of the dysenteric amoeba (Entamoeba histolytica). You will study its life cycle, morphological forms (cysts, luminal and tissue forms), routes of transmission, and virulence factors leading to ulceration in the large intestine and extraintestinal complications (e.g., amoebic liver abscess).
During practical classes and exams, instructors most frequently ask to distinguish pathogenic E. histolytica from the commensal Entamoeba coli. Mandatory topics also include the developmental cycle of the pathogen and laboratory diagnostic methods for amoebiasis, primarily the rules for sample collection and native smear microscopy.