Contamination of Water with Sewage is Indicated by Cysts of (A) Escherichia (B) Entamoeba (C) Pseudomonas (D) Leishmania

Answer :  The correct answer to this question is option B Entamoeba. Several reports and outbreaks of sewage contamination worldwide are reported with the presence of E. histolytica. Entamoeba histolytica is a pathogenic protozoan, invasive, which can cause amoebiasis with chronic diarrhoea in most developing countries. The parasite has two stages in the life cycle, trophozoite and cyst. The Cyst is a non-motile and infectious parasite which can survive for several weeks. The cyst is excreted by faeces and is quite prevalent in tropical, non-tropical and clod areas by the medium of contaminated water. It causes morbidity in regions with inadequate and poor sewage facilities.