AMOEBIASIS-PROTOZOA

It is caused by entamoeba histolytica also known as amoebic dysentery. Its trophozites that penetrate the wall of the intestine,secrete histolttic enzymes and feed upon its cells causing the formation of ulcers. These ulcers rupture and discharge blood and mucus into the intestine that pass with stool. The trophozoites under certain circumsrances reach the liver and brain also cause abscess formation.No intermediate host is involved in the life cycle of the parasite. Through the tetranucleate cysts  the transmission of the parasite from man to man. further the trophozoite changes into a smaller minuta form which other side form the tetranucleate cyst. The cyst are voided with the faecal matter and contaminate food and water spread into new host. e.g house flies.
Amoebic dysentery is endemic in warm countries .Medicines used for these are Emertin, fumagillin,erythromycin,aureomycin,metromidazole.