(a)Name the protozoan parasite that causes amoebic dysentry in humans

(a)Name the protozoan parasite that causes amoebic dysentry in humans.
(b)Mention two diagnostic symptoms of the disease.
©How is this disease transmitted to others?

(a)Entamoeba histolytica.
(b)Symptoms: constipation,abdominal pain, stools with mucus and blood clot.
©Contaminated food or water.