The pathogenecity of Entamoeba histolytica is indicated by ?
Ans. is 'a' i.e., Isoenzyme pattern Zymodene There are distinct invasive and noninvasive strains of E. histolytica. These strains vary according to their isoenzyme patterns (zymodemes). E. histolytica strains have 22 zymodemes of these 10 zymodemes are invasive and 12 are noninvasive. Zymodemes of E. histolytica are identified according to the electrophoretic mobility of 4 enzymes. L-malate : NADP+ Oxidoreductase Phosphoglucomutase (PGM)-------- most impoant Glucose-phosphate isomerase Hexokinase Electrophoresis of PGM can show one or more of the 4 bands : a, 13, y and 5. Strains of E. histolytica showing, an absence of a-band together with the presence of 13 band are virulent i.e., invasive.
Isoenzyme pattern
Size
Nuclear pattern
ELISA test