Entamoeba histolytica is an anaerobic parasitic protozoan that infects the digestive tract of predominantly humans and other primates. It is a parasite that infects an estimated 50 million people around the world and is a significant cause of morbidity and mortality in developing countries.
The infection of E. histolytica causes the disease, Amebiasis (or Amoebiasis). E. histolytica infects the digestive tracts of predominantly humans and other primates. E. histolytica can infect dogs and cats, but these animals do not contribute significantly to transmission since they usually do not produce cysts. Cysts do not invade tissue and are shed with the host’s feces. The thick protective walls allow the cysts to remain viable for several weeks in the external environment and the internal acid content of the stomach.
The symptoms of the disease is often mild, causing diarrhea and abdominal pain. Amebic dysentery—a more severe symptom can occur. Symptoms of amebic dysentery include severe stomach pain, blood and mucus in feces and high temperature fever. Seldom does the infection invade the liver and cause an abscess.