Name the causative organism of the disease amoebiasis. List three symptoms of the disease.

Amoebiasis is caused by the protozoan parasite Entamoeba histolytica. Three symptoms of the disease are:

1. In acute conditions, diarrhoea or dysentery occurs with frequent, small and often bloody stools.
   
2. In chronic cases gastrointestinal symptoms are seen plus fatigue, weight loss and occasional fever
   
3. Liver abscess seen in severe cases.