Do entamoeba really have mitochondrion and where does the glucose come from as source of food for fermentation

the very source of glucose might major come from engulfed red blood cells ( erythrocyte) .

erythrocyte 's citation:
Mammalian erythrocytes also lose their other organelles including their mitochondria and produce energy by fermentation, via glycolysis of glucose followed by lactic acid production. Furthermore, red cells do not have an insulin receptor and thus glucose uptake is not regulated by insulin.(www.wikipedia.com)

EH engulf rbc , gains the glucose of it .

EH lacking Mitochondrion , so fermentation took place.

The genome of E. histolytica is revealed and a variety of metabolic adaptations shared with two other amitochondrial protest pathogens: Giardia Lamblia and Trichomonas vaginalis

These adaptations have reduced or eliminated many mitochondrial metabolic pathways and the use of oxidative stress enzymes generally used with anaerobic prokaryotes.

EH has no mitochondrion.